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Queensland-based yowie researcher 00:01
Dean Harrison and his team 00:03
are testing out infrared cameras 00:04
at Springbrook National Park. 00:06
They picked this spot because they believe 00:09
they've seen traces of yowie activity among the brush. 00:11
And that night, they capture this mysterious footage. 00:14
The thermal imagery seems to show a solitary figure 00:18
hiding behind, or even hugging, a large tree trunk. 00:21
[Harrison] This is doing what yowies do. 00:25
They hug a tree, 00:27
pretend they're part of it because of a human in the area. 00:29
They just blend. So it seems he's putting his head in. 00:31
[Harris] Minutes later, the image changes. 00:35
Now it looks like there's a couple. 00:37
[Harrison] Two giant creatures emerge from the foliage, 00:39
and one is bending down to pick up something. 00:42
[Harris] As it bends over, you can also make out 00:44
what looks like one of the creatures' heads. 00:46
It looks cone-shaped. 00:49
The figures are large, 00:50
with wide shoulders and ape-like proportions. 00:52
Field researcher Cliff Barackman, 00:55
who has been to Australia to study the yowie, 00:56
says the footage aligns with descriptions 00:59
from indigenous peoples going back centuries. 01:01
[Barackman] All the Aborigines down there have drawings 01:04
on the walls of caves depicting these things. 01:07
They're prevalent in their storytelling traditions as well. 01:09
But then the settlers came in the late 1700s, 01:13
and they, too, started running into yowies. 01:16
Which is another very strong indicator 01:20
that they're a real, biological animal. 01:22
Now, Bigfoot-like creatures are part of folklore the world over. 01:25
Nepal had the yeti, Mongolia has the alma. 01:29
One theory is that they all descended 01:32
from a single Asian ancestor, 01:34
some of whom made it to Australia 01:36
while others crossed the Bering Land Bridge, 01:38
came to North America, and evolved into Bigfoot. 01:40
If this video is real, it could help prove that theory. 01:43
But that's a big if. 01:47
There's some sort of subject, creature, person, if you will. 01:53
It's something that's emitting a heat signature. 01:57
And as we go through different FLIR filter rays, 02:00
this object's movement is consistent. 02:04
There's something happening in here that's moving around. 02:06
[Harris] Look at the footage with this filter. 02:09
Now the head comes into better view. 02:12
It appears to have a pronounced sagittal crest, 02:13
a ridge of bone along the top of the cranium. 02:16
It's similar to what's seen 02:19
in the skulls of the early hominid Australopithecus, 02:20
which some believe to be the common ancestor 02:23
of Bigfoot, yowie, and other similar creatures. 02:25
But Primeau is cautious. 02:28
Although we have not found any evidence to support 02:30
that the recording was fabricated, 02:32
we have no idea what is being depicted here. 02:34
Next, our zoologist, Roxy Furman, 02:38
analyzes the anatomy of the figures. 02:40
What we can see clearly at one point 02:43
is that there are two animals pictured. 02:45
It also looks like it's a bipedal animal, 02:47
which means it walks on two legs. 02:51
[Harris] That might have you thinking primate. 02:52
But here's a key fact: 02:55
there are no known primates native to Australia. 02:56
In fact, the only bipedal animals 03:00
are the cassowary and the kangaroo, 03:02
which look nothing like this. 03:04
So how do we explain the heat signatures 03:06
and those head shapes? 03:09
Furman thinks she may have the answer: 03:11
People wearing headlamps. 03:13
That would explain why the head's a slightly strange shape. 03:15
[Harris] That means the people were misidentified 03:19
or participants in an elaborate hoax, 03:21
maybe Australia's version of The Patterson-Gimlin Film, 03:24
if that was a hoax, too. 03:27
But anthropologist Kathy Strain says that in this case, 03:29
size does matter. 03:32
The research team went back to the spot in daylight 03:33
and measured the tree, 03:36
matching the thermal footage as best they could 03:37
to get a sense of the size of the figures 03:39
in the infrared video. 03:41
[Strain] Whatever it is is more than eight feet tall. 03:43
The possibility of them being human is highly unlikely. 03:47
I came to the conclusion that what this video shows 03:51
are two real yowie. 03:55
I think it is one of the most significant films taken 03:57
in at least 50 years. 04:00
So yes, there's a possibility that this is a hoax. 04:07
But based on Professor Strain's estimate 04:10
of the creature's height, 04:13
we're going to say these are possible yowies. 04:14
It's 2011 in a small village in Russia. 04:16
A local farmer reports that his home is shaken 04:19
by a large explosion nearby. 04:22
While looking for the source, the farmer stumbles upon this-- 04:24
some remains that look nothing like the usual local wildlife. 04:28
Take a good look. 04:32
The creature has a strange head and an even stranger torso 04:34
and limbs. 04:37
And the state its in is even more puzzling. 04:38
It appears petrified. 04:41
The way this finding is displayed in the video 04:42
is also quite intriguing. 04:45
What's very interesting to me is that they're drying 04:46
some corn at the same time. 04:49
And I wouldn't think you'd want to put something 04:51
alien next to a food resource. 04:54
TONY HARRIS: According to the source who gave us this video, 04:56
the cause of the explosion was never found. 04:59
But residents of the town were more 05:02
frightened by what this creature could 05:03
portend for their village. 05:05
Journalist Erin McCarthy says local legends 05:07
could explain why. 05:10
In Slavic folklore, there's Baba Yaga, 05:11
a witch who lives in the woods, in a shack that has 05:13
chicken legs and chicken feet. 05:16
She also steals and eats children. 05:19
TONY HARRIS: Baba Yaga has become 05:22
the equivalent to the boogeyman for kids in this region. 05:23
Some locals may have believed, this creature 05:26
was her handiwork, but McCarthy says 05:28
there could be another slightly less creepy explanation. 05:30
Permafrost is melting in Russia. 05:33
And with that melting, all kinds of extinct creatures 05:35
are popping up like mammoths and rhinos. 05:38
So potentially, this creature is something 05:41
that's extinct that we just don't know about yet. 05:44
Now, there are some conditions on Earth that could instantly 05:48
mummify a living creature, like the super alkaline waters 05:51
of Lake Natron in Tanzania. 05:55
But there's no evidence something like that 05:57
currently exists in Russia. 05:59
So before we determine if this video shows 06:01
an undiscovered dinosaur or even a child-eating witch, 06:03
our experts will dig deeper. 06:08
First, video forensic analyst Mick 06:14
West examines whether the specimen 06:16
could be some kind of hoax. 06:18
I think the only way you could have done that is 06:19
to have modeled it from life. 06:23
And that means that you actually had the real thing 06:24
to start off with. 06:26
So I think the simplest explanation 06:27
here is that what we're seeing is what we're getting. 06:28
This is, in fact, a dead animal that has been 06:31
partially or fully mummified. 06:34
TONY HARRIS: If this is indeed some kind 06:36
of animal, what kind of animal? 06:38
Just in terms of the morphology, 06:40
something about its face looks quite birdlike to me. 06:42
It looks like it could have part of the beak that 06:45
had formed off or not been preserved 06:47
in this mummification process. 06:50
But it's got a really big eye socket. 06:53
Birds tend to have quite small eyes. 06:55
So for me, that would kind of rule out a bird. 06:57
TONY HARRIS: That Xes out it being 07:00
one of Baba Yaga's chickens. 07:01
Biologist Floyd Hayes is thinking mammal. 07:03
FLOYD HAYES: OK, right here, it looks like there 07:06
may be some teeth in the jaws. 07:08
To me, the skull looks much more like a mammal. 07:10
It does look like there may be a wing. 07:13
It could potentially be a fruit bat. 07:15
There are some large species of fruit bats called flying foxes. 07:19
TONY HARRIS: Furman sees some merit in the bat theory. 07:23
They also do have that similar large nose 07:26
that we can see in this fossil. 07:30
In terms of their skeleton, they do have a long neck as well. 07:32
And going right to the end of what looks like it could have 07:35
been wings, they have what looks like it was a claw 07:38
or a hand of some sort. 07:41
TONY HARRIS: So it kind of looks like a large fruit bat. 07:42
But here's the problem. 07:45
They don't live up in Russia though. 07:46
They're more characteristic of the tropical islands 07:48
in the Western Pacific Ocean and Indian Ocean and 07:50
in Southeastern Asia. 07:53
TONY HARRIS: Floyd says, until this family 07:55
comes forward with the specimen, we can't be certain what it is. 07:57
The process of mummification could 08:00
take a long period of time. 08:02
It's possible that this is an extinct species 08:04
of animal that formerly lived in Russia, 08:06
that is no longer there today. 08:09
So I know we're going out on a limb here. 08:15
But for now, we're going to say this is 08:18
an unidentified extinct animal. 08:21
Of course, it would take proper scientific examination 08:23
to know for sure. 08:26
But with the Arctic warming two times faster 08:27
than the global average, we may see 08:29
more strange creatures thawing out from the permafrost soon. 08:31
And we'll do our best to identify them. 08:36
On a Friday evening in 2008, 08:39
geology professor Heinrich Frank 08:41
is homebound on the freeway 08:43
past the town of Novo Hamburgo, Brazil. 08:45
Something catches his eye at a construction site 08:48
on the side of the road. 08:51
Take a look. 08:52
The first tunnel I found was very, very small. 08:54
And when I entered, I see immediately 08:57
the claw marks on the walls. 09:01
(Host) Look closer. 09:03
Dr. Frank focuses on this, 09:04
grooves dug into the tunnel walls 09:06
and slashes in the surface. 09:08
What could have made these marks? 09:11
Dr. Frank's research dates the caves 09:13
to be about 12,000 years old. 09:15
And there's reason to think 09:18
they aren't just natural formations. 09:19
Taken a close look at them from a scientific point of view, 09:21
they don't appear to be natural caves 09:24
based on the types of rocks that they're being cut in. 09:26
Some of these rocks are much harder. 09:28
The easy rocks can be broke by water. 09:29
They also have a really weird shape, 09:32
that they're more horizontal than they are vertical. 09:34
Which tells me that something carved these tunnels out. 09:36
When you consider all the megafauna, 09:40
you have only two animals 09:43
with the necessary claws to build tunnels. 09:45
The armadillos and the sloths. 09:48
(Host) We're talking now about the Pleistocene era 09:50
which ended 11,700 years ago. 09:53
It was the age of megafauna, 09:56
gargantuan mammals like mastodons, 09:58
and in this case perhaps the famous giant sloth. 10:00
Could Frank have discovered some sort of ancient burrow? 10:03
Or could such an animal, believed to be extinct, 10:07
still be living there today? 10:09
(Frank) When you go inside the tunnels, 10:10
sometimes you feel like the animal 10:13
is on the next corner. 10:15
(Host) The fossil records show that Megalonyx sloths 10:18
were the size of present day bull elephants. 10:21
But throw in there massive claws on each forearm 10:24
used for defense, they roamed the Western Hemisphere 10:26
when humans first arrived. 10:29
One can only imagine how terrifying it must have been 10:31
to try to hunt these giant ground sloths. 10:34
In fact, there has been evidence found of these 10:37
giant ground sloths, the Mylodons, 10:40
that were actually trapped in a cave in Argentina 10:42
and corralled and kept as a food source 10:46
by primitive humans. 10:48
Giant sloths and humans together? 10:51
If it sounds like something out of a horror film 10:54
instead of history, 10:56
a recent find will change your mind. 10:58
At White Sands in New Mexico, 11:00
archeologists uncovered the prints of a giant sloth 11:01
being followed by humans. 11:05
They were stalking it. 11:06
So could these giants still be around? 11:08
Did they dig the Brazilian tunnels? 11:10
And if not them, then what did? 11:13
(Anderson) If you take a look at the tops of the ceilings 11:19
in one of these caverns, 11:22
you'll see that they're-- look like claw marks. 11:24
(Host) So geologist Bob Anderson thinks 11:26
some sort of burrowing creature made these caves. 11:28
And what if these animals still exist? 11:30
Archeologist Ed Barnhart says not so fast. 11:33
Well, some people have suggested 11:36
that these giant caves are actually 11:38
the holes and burrows. 11:41
Well, that's an interesting idea, 11:44
but show me the artifacts. 11:46
(Host) So far there's no proof. 11:48
No one has captured a giant sloth, 11:50
found a carcass or taken a single picture of one. 11:52
So I can take giant sloth right off the list. 11:54
(Host) And Barnhart even questions if giant sloths 11:57
ever dug these tunnels at all. 12:00
(Barnhart) Look down in this section here. 12:02
There's one, one, one. 12:04
There's one coming across here. 12:06
There is no reason to believe that these are claw marks, 12:08
because they would be repeatedly sections of three. 12:12
(Host) Barnhart makes a good point. 12:16
But if a giant three-toed sloth had uneven claws, 12:18
it might leave one, two or three marks 12:21
depending on how hard it was digging. 12:23
Still, Barnhart thinks it's more likely 12:25
the marks were created by an extinct worm-like creature 12:27
called a trilobite. 12:30
Some were predators. 12:31
The biggest weighed as much as 10 pounds, 12:33
and they were known to burrow into walls. 12:34
These are much more like worm casts 12:37
that were into the wall. 12:40
Trilobites make more sense to me 12:42
because those are individual hot-dog-shaped things 12:44
that attach themselves to the wall and dig in. 12:47
(Host) But hang on. As you can see, 12:50
there are distinct differences between these 12:53
confirmed trilobite tracks 12:54
and what we see in Dr. Frank's tunnels? 12:56
Is this case really closed? 12:58
Okay. It's true that no giant sloth fossils 13:04
have been found in Dr. Frank's tunnels. 13:07
But the marks don't look exactly like trilobite tracks either. 13:09
So we can't come down on one side or the other. 13:13
We're calling this an unexplained phenomenon 13:16
until we get further proof. 13:18
[host] Tartu, Estonia. 13:21
October 2021. 13:22
Johan Hui Bapju receives a disturbing phone call 13:24
from his mother regarding her chicken coop. 13:27
He offers to take a look, 13:29
but nothing could prepare him 13:30
for what he found. 13:32
-[dramatic music] -[unintelligible] 13:33
Oh, boy. 13:37
Their tail is really tangled. 13:38
[host] That's an understatement. 13:41
Let's take another look. 13:42
What looks like a heap of black rats 13:44
is actually a heap of black rats 13:47
with their tails hopelessly entangled together. 13:48
There are 13 rats in this bundle 13:52
bound together for life. 13:54
[McCarthy] One of them, unfortunately, 13:56
looks like it has... 13:58
passed on to the next world. 13:59
And maybe that's for the best. 14:01
I wouldn't wanna be tied to... 14:03
a bunch of my brothers and sisters either. 14:06
[host] Would you believe that this isn't the first time 14:08
a knot of rats like this has been discovered? 14:11
It's even got a name. 14:13
The Rat King. 14:15
The term Rat King is 14:17
thought to originate 14:19
from German. 14:20
It's a number of rats 14:21
whose tails have become 14:23
entangled so that they are 14:24
basically like a rodent super organism. 14:26
An older wiser rat 14:29
would sit atop a pile of younger rats 14:31
and they would serve all of his needs. 14:35
Unfortunately for Rat Kings, 14:38
they are considered to be 14:40
bad omens. 14:41
It's thought that they warn of the plague. 14:42
They're also associated with witchcraft. 14:45
[host] Because of this, in old Strasbourg 14:49
were Rat Kings were found, 14:51
they were usually drowned in a well 14:52
or dumped in boiling water 14:54
before being brought to the local school teacher 14:55
to study them. 14:57
Because of their supernatural associations 14:58
and the rarity of their occurrences, 15:00
there's debate as to whether or not Rat Kings 15:02
are cruel man-made hoaxes. 15:05
[McCarthy] There is a long history 15:07
of fabricating creatures for profit. 15:09
Think about P. T. Barnum's Fiji Mermaid, 15:12
George Hull's Cardiff Giant. 15:15
Back in the day, 15:18
people would take lizards and glue bat wings on them 15:19
and say, "Here, buy a dragon." 15:22
Or they'd stick a narwhal horn on a horse and say, 15:24
"This is a unicorn." 15:27
So, a hoax is definitely 15:28
not outside the realm of possibility. 15:30
Knots are complicated. 15:34
There's a whole area of mathematics 15:36
called Knot Theory 15:38
dedicated to studying these things in the abstract. 15:39
And the knots of the Rat King tails are complex too. 15:43
Scientist have attempted to recreate them 15:46
and they quickly discovered it was a lot harder than expected. 15:48
The knots they made looked too neat and intentional. 15:51
And those rats were dead. 15:55
Let's turn to our experts to see what they think 15:57
about this whole thing. 15:59
[suspenseful music] 16:01
[host] First, we turned to biologist Floyd Hayes 16:04
to find out, is this real? 16:06
And, if so, how the heck does something like this happen? 16:08
One possibility is that it was faked 16:10
and somebody actually stuck the tails together. 16:13
But it could also be a natural phenomenon 16:17
and I think that's most likely in this case. 16:19
It's been suggested that perhaps they are stuck together 16:21
from birth, but that seems very unlikely 16:24
because these are fairly well grown 16:26
and they would likely starve to death 16:28
if they were stuck together for a few weeks. 16:30
[host] So, if they weren't destined at birth 16:33
to become parts of a Rat King, 16:35
how do they form? 16:36
[Hayes] So a Rat King occurs 16:38
when the tails are stuck together. 16:39
This usually happens in black rats, which have 16:40
unusually long tails 16:42
compared to other species of rats. 16:44
And it happens mostly in cold countries 16:46
during the winter months. 16:49
And it is believed that their tails 16:50
are frozen together overnight 16:52
when they're huddling together for warmth 16:53
by water or urine 16:56
or sperm or food. 16:58
[host] However, in a bizarre twist, 17:00
when we do some research of our own, we find 17:02
that temperatures in this area of Estonia 17:04
only had a low of 36 degrees Fahrenheit 17:06
the night before this Rat King was found. 17:08
Not cold enough to freeze. 17:11
And what's more, rats, contrary to their reputation, 17:13
groom themselves nearly as much as cats. 17:15
The idea that they could get stuck together 17:18
with dirt and grime seems unlikely. 17:19
So, we turn to wildlife biologist Stephanie Schuttler. 17:22
She says the Rat King legend carries a grain of truth. 17:24
Rats can be carriers of diseases 17:28
and parasites, 17:30
so, the fact that people thought Rat Kings 17:32
were bad omens 17:35
or carriers or signals of plague, 17:36
it's not that unreasonable of a leap. 17:39
[host] It might just be coincidence, 17:42
but the COVID-19 epidemic was still ravaging Europe 17:44
when this video was shot. 17:47
And Schuttler says 17:48
there's another question gnawing at her. 17:49
Why do these rats lie down and accept their fates? 17:51
Why don't they fight back? 17:54
[Schuttler] When animals are 17:55
stuck or trying to escape from something, 17:57
they can do things like... 18:00
chew their own appendage off. 18:02
Like, this has happened 18:04
in leg traps 18:05
with animals like coyotes or wolves. 18:07
Why aren't these rats 18:09
chewing their own tails off to get away? 18:11
Our verdict? 18:17
It seems like Rat Kings form naturally, 18:18
but what we don't know is the why of it all. 18:21
Why aren't there more Rat Kings? 18:24
And why don't these rats make more of an effort 18:26
to escape? 18:28
It remains an unexplained mystery. 18:29
Eisenhower State Park, Texas 2015. 18:33
One morning after some record-setting rain, 18:37
a few rangers are checking the park's back roads 18:39
when they discover this. 18:42
KEN GERHARD: It's pretty gross and weird and disgusting. 18:44
SHOW HOST: At first glance, it almost looks 18:48
like patties of ground beef, oddly arranged straight 18:49
down the middle of the road. 18:52
But look closer. 18:53
Is that one wiggling? 18:55
KEN GERHARD: They look to be giant masses of earthworms 18:57
or annelids, segmented worms. 19:01
I've honestly never heard of any type 19:03
of behavior like this before. 19:06
SHOW HOST: So what are these worms doing? 19:08
And why? 19:10
Since we couldn't ask them, Gerhard got to theorizing. 19:11
One interesting possibility is that we're 19:15
looking at a spontaneous attempt at evolution. 19:16
These worms are attempting to build a superorganism. 19:19
SHOW HOST: And these worms wouldn't 19:25
be the first to try it. 19:26
KEN GERHARD: One example would be something called a tunicate. 19:27
This is a very primitive type of vertebrate 19:31
that will actually join together and form a massive chain 19:34
tens of feet long. 19:38
And there is an advantage to this in terms of locomotion 19:39
through the water. 19:43
SHOW HOST: Social insects can do something similar, 19:44
creating a group of synergetic organisms 19:46
known as a superorganism. 19:49
KEN GERHARD: In times of heavy flooding, 19:51
you'll often see these complete islands 19:53
of ants that join together. 19:55
It's kind of a survival mode where these animals 19:57
are able to collaborate in order to survive 20:00
an extreme situation. 20:03
SHOW HOST: And who could forget bees, 20:05
one of the better known superorganisms 20:07
and the source of inspiration for the term "hive mind." 20:09
Perhaps these worms are exhibiting just that. 20:12
I think this is a great example of a very primitive 20:15
life form, a worm, demonstrating that perhaps it 20:18
has a level of conscious collective intelligence 20:21
that is greatly underestimated. 20:25
Some scientists are starting to believe 20:28
that the complex brains that you and I have 20:30
could have evolved from the very first worms. 20:33
So does that make worms smart or humans dumb? 20:35
We'll let you make the call. 20:39
As for these worm balls, we'll rely 20:40
on the brains of our experts. 20:43
Wow. 20:48
SHOW HOST: First, Dr. Floyd Hayes considers 20:49
the superorganism theory. 20:51
FLOYD HAYES: Worms could detect each other 20:52
through olfactory cues. 20:54
And they are attracted to larger groups of worms. 20:55
So they like to socialize for some reason. 20:58
SHOW HOST: While the worms do socialize to some degree, 21:02
Hayes notes that true superorganisms are eusocial. 21:04
They have designated individuals that reproduce, 21:07
and others that don't. 21:11
And they have a very complex society. 21:12
These worms are not examples of eusocial animals, 21:14
so I would not classify them as a superorganism. 21:18
SHOW HOST: OK, if superorganism isn't the right word, what is? 21:21
It's hard to understand why exactly they're gathered 21:24
together in the road there. 21:27
It may be drying up a little bit. 21:28
And one potential benefit of grouping together 21:30
would be that they could stay more humid 21:32
for a longer period of time. 21:34
SHOW HOST: Dr. Hayes brings up an important point. 21:36
Worms need moisture to live. 21:38
The mucus on a worm's skin actually acts as a medium 21:40
for oxygen absorption, meaning that in order to breathe, 21:43
the worm cannot dry out. 21:46
That's what makes the strange alignment of these worm balls 21:48
the biggest mystery of all. 21:51
STEPHANIE SCHUTTLER: It's really strange 21:52
that the worms seem to congregate in the center 21:53
of the road, almost perfectly. 21:58
It is probably the driest part of the road. 22:00
Roads are designed to mound in the center 22:02
so that water can go off the road. 22:06
SHOW HOST: It's not adding up. 22:09
If worms need moisture to live, why gather at the driest place 22:10
available? 22:13
So, folks, we're stumped. 22:19
While it's not unnatural for animals to herd together, 22:21
this peculiar behavior is leading us to call 22:24
this an unexplained phenomenon. 22:27
In the end, Darwin concluded that despite their small size, 22:29
worms are just as capable of shaping 22:33
the landscape as any person. 22:35

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[English]
Queensland-based yowie researcher
Dean Harrison and his team
are testing out infrared cameras
at Springbrook National Park.
They picked this spot because they believe
they've seen traces of yowie activity among the brush.
And that night, they capture this mysterious footage.
The thermal imagery seems to show a solitary figure
hiding behind, or even hugging, a large tree trunk.
[Harrison] This is doing what yowies do.
They hug a tree,
pretend they're part of it because of a human in the area.
They just blend. So it seems he's putting his head in.
[Harris] Minutes later, the image changes.
Now it looks like there's a couple.
[Harrison] Two giant creatures emerge from the foliage,
and one is bending down to pick up something.
[Harris] As it bends over, you can also make out
what looks like one of the creatures' heads.
It looks cone-shaped.
The figures are large,
with wide shoulders and ape-like proportions.
Field researcher Cliff Barackman,
who has been to Australia to study the yowie,
says the footage aligns with descriptions
from indigenous peoples going back centuries.
[Barackman] All the Aborigines down there have drawings
on the walls of caves depicting these things.
They're prevalent in their storytelling traditions as well.
But then the settlers came in the late 1700s,
and they, too, started running into yowies.
Which is another very strong indicator
that they're a real, biological animal.
Now, Bigfoot-like creatures are part of folklore the world over.
Nepal had the yeti, Mongolia has the alma.
One theory is that they all descended
from a single Asian ancestor,
some of whom made it to Australia
while others crossed the Bering Land Bridge,
came to North America, and evolved into Bigfoot.
If this video is real, it could help prove that theory.
But that's a big if.
There's some sort of subject, creature, person, if you will.
It's something that's emitting a heat signature.
And as we go through different FLIR filter rays,
this object's movement is consistent.
There's something happening in here that's moving around.
[Harris] Look at the footage with this filter.
Now the head comes into better view.
It appears to have a pronounced sagittal crest,
a ridge of bone along the top of the cranium.
It's similar to what's seen
in the skulls of the early hominid Australopithecus,
which some believe to be the common ancestor
of Bigfoot, yowie, and other similar creatures.
But Primeau is cautious.
Although we have not found any evidence to support
that the recording was fabricated,
we have no idea what is being depicted here.
Next, our zoologist, Roxy Furman,
analyzes the anatomy of the figures.
What we can see clearly at one point
is that there are two animals pictured.
It also looks like it's a bipedal animal,
which means it walks on two legs.
[Harris] That might have you thinking primate.
But here's a key fact:
there are no known primates native to Australia.
In fact, the only bipedal animals
are the cassowary and the kangaroo,
which look nothing like this.
So how do we explain the heat signatures
and those head shapes?
Furman thinks she may have the answer:
People wearing headlamps.
That would explain why the head's a slightly strange shape.
[Harris] That means the people were misidentified
or participants in an elaborate hoax,
maybe Australia's version of The Patterson-Gimlin Film,
if that was a hoax, too.
But anthropologist Kathy Strain says that in this case,
size does matter.
The research team went back to the spot in daylight
and measured the tree,
matching the thermal footage as best they could
to get a sense of the size of the figures
in the infrared video.
[Strain] Whatever it is is more than eight feet tall.
The possibility of them being human is highly unlikely.
I came to the conclusion that what this video shows
are two real yowie.
I think it is one of the most significant films taken
in at least 50 years.
So yes, there's a possibility that this is a hoax.
But based on Professor Strain's estimate
of the creature's height,
we're going to say these are possible yowies.
It's 2011 in a small village in Russia.
A local farmer reports that his home is shaken
by a large explosion nearby.
While looking for the source, the farmer stumbles upon this--
some remains that look nothing like the usual local wildlife.
Take a good look.
The creature has a strange head and an even stranger torso
and limbs.
And the state its in is even more puzzling.
It appears petrified.
The way this finding is displayed in the video
is also quite intriguing.
What's very interesting to me is that they're drying
some corn at the same time.
And I wouldn't think you'd want to put something
alien next to a food resource.
TONY HARRIS: According to the source who gave us this video,
the cause of the explosion was never found.
But residents of the town were more
frightened by what this creature could
portend for their village.
Journalist Erin McCarthy says local legends
could explain why.
In Slavic folklore, there's Baba Yaga,
a witch who lives in the woods, in a shack that has
chicken legs and chicken feet.
She also steals and eats children.
TONY HARRIS: Baba Yaga has become
the equivalent to the boogeyman for kids in this region.
Some locals may have believed, this creature
was her handiwork, but McCarthy says
there could be another slightly less creepy explanation.
Permafrost is melting in Russia.
And with that melting, all kinds of extinct creatures
are popping up like mammoths and rhinos.
So potentially, this creature is something
that's extinct that we just don't know about yet.
Now, there are some conditions on Earth that could instantly
mummify a living creature, like the super alkaline waters
of Lake Natron in Tanzania.
But there's no evidence something like that
currently exists in Russia.
So before we determine if this video shows
an undiscovered dinosaur or even a child-eating witch,
our experts will dig deeper.
First, video forensic analyst Mick
West examines whether the specimen
could be some kind of hoax.
I think the only way you could have done that is
to have modeled it from life.
And that means that you actually had the real thing
to start off with.
So I think the simplest explanation
here is that what we're seeing is what we're getting.
This is, in fact, a dead animal that has been
partially or fully mummified.
TONY HARRIS: If this is indeed some kind
of animal, what kind of animal?
Just in terms of the morphology,
something about its face looks quite birdlike to me.
It looks like it could have part of the beak that
had formed off or not been preserved
in this mummification process.
But it's got a really big eye socket.
Birds tend to have quite small eyes.
So for me, that would kind of rule out a bird.
TONY HARRIS: That Xes out it being
one of Baba Yaga's chickens.
Biologist Floyd Hayes is thinking mammal.
FLOYD HAYES: OK, right here, it looks like there
may be some teeth in the jaws.
To me, the skull looks much more like a mammal.
It does look like there may be a wing.
It could potentially be a fruit bat.
There are some large species of fruit bats called flying foxes.
TONY HARRIS: Furman sees some merit in the bat theory.
They also do have that similar large nose
that we can see in this fossil.
In terms of their skeleton, they do have a long neck as well.
And going right to the end of what looks like it could have
been wings, they have what looks like it was a claw
or a hand of some sort.
TONY HARRIS: So it kind of looks like a large fruit bat.
But here's the problem.
They don't live up in Russia though.
They're more characteristic of the tropical islands
in the Western Pacific Ocean and Indian Ocean and
in Southeastern Asia.
TONY HARRIS: Floyd says, until this family
comes forward with the specimen, we can't be certain what it is.
The process of mummification could
take a long period of time.
It's possible that this is an extinct species
of animal that formerly lived in Russia,
that is no longer there today.
So I know we're going out on a limb here.
But for now, we're going to say this is
an unidentified extinct animal.
Of course, it would take proper scientific examination
to know for sure.
But with the Arctic warming two times faster
than the global average, we may see
more strange creatures thawing out from the permafrost soon.
And we'll do our best to identify them.
On a Friday evening in 2008,
geology professor Heinrich Frank
is homebound on the freeway
past the town of Novo Hamburgo, Brazil.
Something catches his eye at a construction site
on the side of the road.
Take a look.
The first tunnel I found was very, very small.
And when I entered, I see immediately
the claw marks on the walls.
(Host) Look closer.
Dr. Frank focuses on this,
grooves dug into the tunnel walls
and slashes in the surface.
What could have made these marks?
Dr. Frank's research dates the caves
to be about 12,000 years old.
And there's reason to think
they aren't just natural formations.
Taken a close look at them from a scientific point of view,
they don't appear to be natural caves
based on the types of rocks that they're being cut in.
Some of these rocks are much harder.
The easy rocks can be broke by water.
They also have a really weird shape,
that they're more horizontal than they are vertical.
Which tells me that something carved these tunnels out.
When you consider all the megafauna,
you have only two animals
with the necessary claws to build tunnels.
The armadillos and the sloths.
(Host) We're talking now about the Pleistocene era
which ended 11,700 years ago.
It was the age of megafauna,
gargantuan mammals like mastodons,
and in this case perhaps the famous giant sloth.
Could Frank have discovered some sort of ancient burrow?
Or could such an animal, believed to be extinct,
still be living there today?
(Frank) When you go inside the tunnels,
sometimes you feel like the animal
is on the next corner.
(Host) The fossil records show that Megalonyx sloths
were the size of present day bull elephants.
But throw in there massive claws on each forearm
used for defense, they roamed the Western Hemisphere
when humans first arrived.
One can only imagine how terrifying it must have been
to try to hunt these giant ground sloths.
In fact, there has been evidence found of these
giant ground sloths, the Mylodons,
that were actually trapped in a cave in Argentina
and corralled and kept as a food source
by primitive humans.
Giant sloths and humans together?
If it sounds like something out of a horror film
instead of history,
a recent find will change your mind.
At White Sands in New Mexico,
archeologists uncovered the prints of a giant sloth
being followed by humans.
They were stalking it.
So could these giants still be around?
Did they dig the Brazilian tunnels?
And if not them, then what did?
(Anderson) If you take a look at the tops of the ceilings
in one of these caverns,
you'll see that they're-- look like claw marks.
(Host) So geologist Bob Anderson thinks
some sort of burrowing creature made these caves.
And what if these animals still exist?
Archeologist Ed Barnhart says not so fast.
Well, some people have suggested
that these giant caves are actually
the holes and burrows.
Well, that's an interesting idea,
but show me the artifacts.
(Host) So far there's no proof.
No one has captured a giant sloth,
found a carcass or taken a single picture of one.
So I can take giant sloth right off the list.
(Host) And Barnhart even questions if giant sloths
ever dug these tunnels at all.
(Barnhart) Look down in this section here.
There's one, one, one.
There's one coming across here.
There is no reason to believe that these are claw marks,
because they would be repeatedly sections of three.
(Host) Barnhart makes a good point.
But if a giant three-toed sloth had uneven claws,
it might leave one, two or three marks
depending on how hard it was digging.
Still, Barnhart thinks it's more likely
the marks were created by an extinct worm-like creature
called a trilobite.
Some were predators.
The biggest weighed as much as 10 pounds,
and they were known to burrow into walls.
These are much more like worm casts
that were into the wall.
Trilobites make more sense to me
because those are individual hot-dog-shaped things
that attach themselves to the wall and dig in.
(Host) But hang on. As you can see,
there are distinct differences between these
confirmed trilobite tracks
and what we see in Dr. Frank's tunnels?
Is this case really closed?
Okay. It's true that no giant sloth fossils
have been found in Dr. Frank's tunnels.
But the marks don't look exactly like trilobite tracks either.
So we can't come down on one side or the other.
We're calling this an unexplained phenomenon
until we get further proof.
[host] Tartu, Estonia.
October 2021.
Johan Hui Bapju receives a disturbing phone call
from his mother regarding her chicken coop.
He offers to take a look,
but nothing could prepare him
for what he found.
-[dramatic music] -[unintelligible]
Oh, boy.
Their tail is really tangled.
[host] That's an understatement.
Let's take another look.
What looks like a heap of black rats
is actually a heap of black rats
with their tails hopelessly entangled together.
There are 13 rats in this bundle
bound together for life.
[McCarthy] One of them, unfortunately,
looks like it has...
passed on to the next world.
And maybe that's for the best.
I wouldn't wanna be tied to...
a bunch of my brothers and sisters either.
[host] Would you believe that this isn't the first time
a knot of rats like this has been discovered?
It's even got a name.
The Rat King.
The term Rat King is
thought to originate
from German.
It's a number of rats
whose tails have become
entangled so that they are
basically like a rodent super organism.
An older wiser rat
would sit atop a pile of younger rats
and they would serve all of his needs.
Unfortunately for Rat Kings,
they are considered to be
bad omens.
It's thought that they warn of the plague.
They're also associated with witchcraft.
[host] Because of this, in old Strasbourg
were Rat Kings were found,
they were usually drowned in a well
or dumped in boiling water
before being brought to the local school teacher
to study them.
Because of their supernatural associations
and the rarity of their occurrences,
there's debate as to whether or not Rat Kings
are cruel man-made hoaxes.
[McCarthy] There is a long history
of fabricating creatures for profit.
Think about P. T. Barnum's Fiji Mermaid,
George Hull's Cardiff Giant.
Back in the day,
people would take lizards and glue bat wings on them
and say, "Here, buy a dragon."
Or they'd stick a narwhal horn on a horse and say,
"This is a unicorn."
So, a hoax is definitely
not outside the realm of possibility.
Knots are complicated.
There's a whole area of mathematics
called Knot Theory
dedicated to studying these things in the abstract.
And the knots of the Rat King tails are complex too.
Scientist have attempted to recreate them
and they quickly discovered it was a lot harder than expected.
The knots they made looked too neat and intentional.
And those rats were dead.
Let's turn to our experts to see what they think
about this whole thing.
[suspenseful music]
[host] First, we turned to biologist Floyd Hayes
to find out, is this real?
And, if so, how the heck does something like this happen?
One possibility is that it was faked
and somebody actually stuck the tails together.
But it could also be a natural phenomenon
and I think that's most likely in this case.
It's been suggested that perhaps they are stuck together
from birth, but that seems very unlikely
because these are fairly well grown
and they would likely starve to death
if they were stuck together for a few weeks.
[host] So, if they weren't destined at birth
to become parts of a Rat King,
how do they form?
[Hayes] So a Rat King occurs
when the tails are stuck together.
This usually happens in black rats, which have
unusually long tails
compared to other species of rats.
And it happens mostly in cold countries
during the winter months.
And it is believed that their tails
are frozen together overnight
when they're huddling together for warmth
by water or urine
or sperm or food.
[host] However, in a bizarre twist,
when we do some research of our own, we find
that temperatures in this area of Estonia
only had a low of 36 degrees Fahrenheit
the night before this Rat King was found.
Not cold enough to freeze.
And what's more, rats, contrary to their reputation,
groom themselves nearly as much as cats.
The idea that they could get stuck together
with dirt and grime seems unlikely.
So, we turn to wildlife biologist Stephanie Schuttler.
She says the Rat King legend carries a grain of truth.
Rats can be carriers of diseases
and parasites,
so, the fact that people thought Rat Kings
were bad omens
or carriers or signals of plague,
it's not that unreasonable of a leap.
[host] It might just be coincidence,
but the COVID-19 epidemic was still ravaging Europe
when this video was shot.
And Schuttler says
there's another question gnawing at her.
Why do these rats lie down and accept their fates?
Why don't they fight back?
[Schuttler] When animals are
stuck or trying to escape from something,
they can do things like...
chew their own appendage off.
Like, this has happened
in leg traps
with animals like coyotes or wolves.
Why aren't these rats
chewing their own tails off to get away?
Our verdict?
It seems like Rat Kings form naturally,
but what we don't know is the why of it all.
Why aren't there more Rat Kings?
And why don't these rats make more of an effort
to escape?
It remains an unexplained mystery.
Eisenhower State Park, Texas 2015.
One morning after some record-setting rain,
a few rangers are checking the park's back roads
when they discover this.
KEN GERHARD: It's pretty gross and weird and disgusting.
SHOW HOST: At first glance, it almost looks
like patties of ground beef, oddly arranged straight
down the middle of the road.
But look closer.
Is that one wiggling?
KEN GERHARD: They look to be giant masses of earthworms
or annelids, segmented worms.
I've honestly never heard of any type
of behavior like this before.
SHOW HOST: So what are these worms doing?
And why?
Since we couldn't ask them, Gerhard got to theorizing.
One interesting possibility is that we're
looking at a spontaneous attempt at evolution.
These worms are attempting to build a superorganism.
SHOW HOST: And these worms wouldn't
be the first to try it.
KEN GERHARD: One example would be something called a tunicate.
This is a very primitive type of vertebrate
that will actually join together and form a massive chain
tens of feet long.
And there is an advantage to this in terms of locomotion
through the water.
SHOW HOST: Social insects can do something similar,
creating a group of synergetic organisms
known as a superorganism.
KEN GERHARD: In times of heavy flooding,
you'll often see these complete islands
of ants that join together.
It's kind of a survival mode where these animals
are able to collaborate in order to survive
an extreme situation.
SHOW HOST: And who could forget bees,
one of the better known superorganisms
and the source of inspiration for the term "hive mind."
Perhaps these worms are exhibiting just that.
I think this is a great example of a very primitive
life form, a worm, demonstrating that perhaps it
has a level of conscious collective intelligence
that is greatly underestimated.
Some scientists are starting to believe
that the complex brains that you and I have
could have evolved from the very first worms.
So does that make worms smart or humans dumb?
We'll let you make the call.
As for these worm balls, we'll rely
on the brains of our experts.
Wow.
SHOW HOST: First, Dr. Floyd Hayes considers
the superorganism theory.
FLOYD HAYES: Worms could detect each other
through olfactory cues.
And they are attracted to larger groups of worms.
So they like to socialize for some reason.
SHOW HOST: While the worms do socialize to some degree,
Hayes notes that true superorganisms are eusocial.
They have designated individuals that reproduce,
and others that don't.
And they have a very complex society.
These worms are not examples of eusocial animals,
so I would not classify them as a superorganism.
SHOW HOST: OK, if superorganism isn't the right word, what is?
It's hard to understand why exactly they're gathered
together in the road there.
It may be drying up a little bit.
And one potential benefit of grouping together
would be that they could stay more humid
for a longer period of time.
SHOW HOST: Dr. Hayes brings up an important point.
Worms need moisture to live.
The mucus on a worm's skin actually acts as a medium
for oxygen absorption, meaning that in order to breathe,
the worm cannot dry out.
That's what makes the strange alignment of these worm balls
the biggest mystery of all.
STEPHANIE SCHUTTLER: It's really strange
that the worms seem to congregate in the center
of the road, almost perfectly.
It is probably the driest part of the road.
Roads are designed to mound in the center
so that water can go off the road.
SHOW HOST: It's not adding up.
If worms need moisture to live, why gather at the driest place
available?
So, folks, we're stumped.
While it's not unnatural for animals to herd together,
this peculiar behavior is leading us to call
this an unexplained phenomenon.
In the end, Darwin concluded that despite their small size,
worms are just as capable of shaping
the landscape as any person.

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