Display Bilingual:

Welcome to Learning English, 00:03
a daily 30 minute program from the Voice of America. 00:06
I'm Caty. Weaver. 00:11
And I'm Mario Ritter Jr. 00:12
This program is designed for English learners. 00:15
So we speak a little slower, and we use words and phrases, 00:19
especially written for people learning 00:24
English. 00:27
On today's program, John Russell reports 00:31
on unmanned aircraft for agriculture. 00:34
Jill Robbins has a story about an ancient, bird like animal. 00:38
Bryan Lynn tells about the Voyager spacecraft on the science report, 00:43
then wishing on lesson of the day. 00:49
But first. 00:54
American companies are developing 00:56
unmanned aircraft systems that are larger than drones. 00:59
The goal is for the aircraft to help agricultural producers 01:04
and reduce risks to human safety. 01:10
When Hector Xue was learning 01:14
to pilot a helicopter in college, 01:16
he remembered having a few bad experiences while flying at night. 01:20
The experiences led him 01:26
to research unmanned aircraft systems 01:28
while getting his doctorate at Massachusetts Institute of Technology. 01:32
Then, Xu formed Rotor Technologies in 2021 01:39
to develop unmanned helicopters. 01:44
Roder has built two autonomous helicopters 01:48
that the company calls Spray Hawks. 01:52
Roder aims to have as many as 20 01:56
spray hawks ready for market next year. 01:59
The company also is developing 02:03
helicopters that would fly shipments into disaster areas 02:06
and to oil rigs in oceans. 02:11
The helicopters could also be used to fight wildfires. 02:14
For now, Roder is paying attention to agriculture. 02:20
The industry has accepted automation 02:25
with drones, but sees unmanned helicopters 02:28
as a better way to spray larger areas 02:32
with pesticides and fertilizers. 02:35
A major appeal of automation 02:39
in agriculture flights is safety, 02:42
because special airplanes, called crop 02:46
dusters, fly at around 240km/h 02:49
and only about three meters off the ground. 02:55
There are tens of accidents each year. 02:59
The small planes hit power lines, 03:03
cell towers and other planes. 03:06
Older planes in disrepair and pilot 03:10
tiredness play a part in accidents. 03:14
2014 report from the 03:18
National Transportation Safety Board found 03:20
there were more than 800 agriculture flight accidents 03:24
between 2001 and 2010, 03:29
including 81 that were deadly. 03:33
A separate report from the National Agriculture Aviation Association 03:37
found nearly 640 accidents from 2014 03:43
until this month, with 109 deaths. 03:48
It is a very, very dangerous profession, 03:53
said Dan Martin, a research engineer with the US Department 03:57
of Agriculture's Agriculture Research Service. 04:02
Martin said about the pilots, 04:07
they make all their money in those short few months. 04:10
So sometimes it may mean that they fly 04:14
10 to 12 hours a day or more. 04:17
Job risks also include possible contact 04:21
with farming, chemicals in recent years. 04:25
Safety and cost concerns have led to a number of drones 04:29
flying above farmers fields, Martin said. 04:34
He added that some 10,000 drones 04:39
will likely be sold this year alone. 04:42
It's growing exponentially as a market 04:46
super fast, Martin said. 04:49
But the size of the drones means they only can cover 04:53
a small amount of the area that a plane or helicopter can. 04:57
The limitation is 05:03
providing an opening for companies building bigger unmanned aircraft 05:05
like Rotor and another company, Pica. 05:10
California based Pica announced in August 05:15
that it had sold its first autonomous electric aircraft 05:19
for crop protection, and to a buyer in the United States. 05:24
Pikas. 05:29
Pelican spray, a fixed wing aircraft, received 05:29
official approval last year to fly for crop protection. 05:34
The company also sold its Pelican 05:39
spray to Dole for use in Honduras 05:42
and to the Brazilian company SLC Agricola. 05:47
Lucas Coke is chief technology officer 05:52
at Hainan Brothers Agro Services. 05:56
The company which but the Pelicans prey in August. 05:59
Coke has called unmanned aircraft 06:04
part of a coming revolution 06:07
that will save farmers money and increase safety. 06:10
The Kansas based company operates out of airports 06:15
from Texas to Illinois. 06:19
Coke does not see the unmanned aircraft 06:22
replacing all the company's pilots, 06:25
but rather taking over the riskiest jobs. 06:29
The biggest draw 06:33
is taking the pilot out of the aircraft inside 06:34
of those most dangerous situations, cook said. 06:38
But Coke also says that autonomous aviation systems 06:43
could bring new dangers to an already busy airspace. 06:48
Still, the risk is 06:53
less of a concern in rural areas, 06:55
with plenty of open space and fewer people. 06:59
Companies like rotor have developed 07:03
their systems to work if bad events come up. 07:06
Rotors helicopter, for example, 07:10
has a half dozen communications systems 07:13
and for now, a remote pilot in control. 07:17
If the ground team loses contact with the helicopter, 07:22
rotor has a system to deal with the problem. 07:27
The system makes sure the engine can be turned off, 07:31
and the helicopter can perform a controlled landing. 07:35
The safety measures will go a long way to helping the company receive 07:40
what it expects will be official government 07:45
approval to fly its helicopters for business purposes 07:49
once the company has approval. 07:54
The difficulty, as Xu sees it, will be building more devices 07:57
to meet the demand in the United States and Brazil. 08:02
I'm John Russell. 08:08
The brains 08:16
of today's birds show a level of intelligence 08:16
and behavioral complexity 08:20
rivaled only by mammals. 08:23
But scientists do not fully understand how bird brains have changed 08:26
over millions of years from the form they had as dinosaurs. 08:32
That understanding is now growing 08:38
thanks to a fossil discovery in Brazil. 08:40
Researchers unearthed the remains, or fossil, of a head, bone 08:44
or skull of a bird species not known before 08:50
it has been named. 08:55
Another witness, Hestia. 08:56
The fossil was in such good condition that scientists were able 08:59
to create a computer image of its brain 09:04
and inner ear structures, as 09:07
it lived in a dry area about 80 million years ago, 09:10
during the Cretaceous period, near the end of the age of dinosaurs. 09:14
This finding is one of a kind, said University of Cambridge 09:21
fossil expert Guillermo Avalon, a lead researcher of the study. 09:25
It appeared this month 09:31
in the publication Nature. 09:32
Birds developed from small feathered dinosaurs 09:35
during the Jurassic period. 09:39
The novel Ana's Discovery 09:42
filled in a 70 million year gap in the understanding of the development 09:44
of the bird dating back to the earliest known bird, 09:49
Archaeopteryx. 09:53
It lived about 150 million years ago 09:56
in what is now Europe. 10:00
The researchers said 10:03
the novel Ana's Skull has a bill 10:04
and is shaped like modern birds. 10:07
Its brain shows both modern and ancient elements, 10:11
and some that are in between. 10:16
Luis Chiapas 10:19
is a fossil scientist at the Natural History Museum of Los 10:21
Angeles County in California, and a co-writer of the study. 10:25
He said scientists 10:31
rarely find such skulls of early birds, 10:33
and this one is the best preserved ever. 10:37
Daniel Field is a fossil scientist 10:41
at the University of Cambridge and the study's lead writer. 10:44
He said scientists have long struggled to understand how 10:49
and when the brains and intelligence of birds developed. 10:54
The field has been awaiting 11:00
the discovery of a fossil exactly like this one. 11:02
He said 11:06
the novel Ana's brain, measuring about ten millimeters 11:08
across, is smaller relative to skull size 11:12
than that of modern birds, 11:17
but the skull is larger 11:20
and more complex than that of Archaeopteryx. 11:22
Its cerebellum, a brain structure 11:27
that in living birds helps with motor control during flight, 11:30
was smaller than in today's bird species 11:34
and more like Archaeopteryx is, 11:37
but its brain was connected to the spinal cord 11:42
in a way similar to modern birds as well as humans. 11:46
It was unlike Archaeopteryx 11:52
and the dinosaurs from which birds evolved. 11:55
Nervousness also had something special its inner ear organ for 11:59
balance is larger than in any other known bird. 12:04
The fossil included 80% 12:10
of the birds bone structure or skeleton. 12:12
The scientists say they believe the bird could fly well 12:16
based on their examination of the remains. 12:21
Field said, if you gave it a quick look, 12:25
you might think it was like a living bird. 12:28
But a closer look would show you some important differences, 12:32
like claws coming out of its wings. 12:36
I'm Jill Robins. 12:40
NASA has once again reconnected 13:00
with its Voyager spacecraft, marking a continuous portion 13:04
of the American space agency's longest mission in history. 13:10
The two spacecraft, Voyager one and Voyager two, 13:16
launched within weeks of each other in 1977, 13:22
so they have been operating for more than 47 years. 13:27
NASA officials have reported several difficulties 13:33
with the spacecraft in recent years, 13:37
mainly communication issues. 13:41
The most recent problems involved 13:44
the Voyager one spacecraft, 13:47
NASA said in a statement in April. 13:50
It had remained out of touch with the spacecraft 13:53
for the previous five months. 13:57
Agency officials said they later learned 14:01
the problem was linked to a chip inside 14:04
one of Voyager One's onboard computers. 14:08
The issue may data being sent 14:13
by the spacecraft unreadable. 14:16
NASA said its engineers were able to fix that problem 14:20
by making changes to how the spacecraft stores and reads data. 14:25
Then in October, 14:32
NASA reported another communication issue 14:34
that resulted in a brief delay 14:38
in receiving data from Voyager one. 14:41
That problem turned out to be linked to the spacecraft's 14:45
radio transmitter system. 14:49
The agency said that 14:53
for some reason, Voyager one's fault 14:55
protection system was activated when NASA sent a command 14:59
for the spacecraft to turn on one of its heaters. 15:05
This activation, meant to save power, 15:09
led Voyager one to start sending signals 15:13
to a different radio transmitter system. 15:17
Then it normally uses. 15:20
This meant NASA had to listen 15:23
for the signals on the S-band instead of the usual X-band. 15:26
Once they did this, they were able 15:32
to start receiving data again. 15:34
NASA has said the S-band is much weaker 15:38
than the X-band, so engineers were seeking 15:42
to get the X-band radio communication system 15:46
back online for long term use. 15:50
NASA said the agency had not used 15:54
the S-band since 1981. 15:57
Voyager one and Voyager two are NASA's 16:02
most distant operating spacecraft. 16:06
The agency has reported Voyager one is exploring space 16:10
from about 24,000,000,000km from Earth, 16:15
while Voyager two is operating 16:20
from about 20.5 billion kilometers away. 16:23
Because of this great distance, NASA says its communication 16:29
with the two Voyagers takes about one day to receive data 16:34
and another day to send information back from Earth. 16:39
The two Voyagers were first 16:44
designed to explore Jupiter and Saturn. 16:47
Both spacecraft successfully 16:51
carried out studies of those planets. 16:54
Later, Voyager two made the first ever 16:57
close observations of Uranus and Neptune. 17:01
In 1989. 17:05
The two spacecraft then began a new mission 17:08
to explore distant areas of space. 17:12
In 2013, NASA 17:16
announced Voyager one had crossed over the border 17:18
dividing our solar system from Interstate stellar space. 17:22
The term interstellar means between stars. 17:27
Scientists say interstellar 17:32
space begins where the sun's continuous flow of particles 17:35
and its magnetic field stop. 17:40
Voyager two first entered 17:44
interstellar space in 2018. 17:46
NASA said the spacecraft was more than 17.7 17:50
billion kilometers from the sun at the time. 17:55
Both Voyagers are the only spacecraft so far 18:00
to explore interstellar space. 18:04
The space agency says the Voyagers are studying 18:08
how the interstellar medium interacts with the solar wind. 18:13
Solar wind is the continuous flow 18:18
of charged particles released by the sun. 18:22
The spacecraft have also provided data on the heliosphere, 18:26
a kind of protective bubble around our solar system. 18:31
Suzanne Dodd is the current project manager 18:37
for the Voyager mission at NASA's Jet 18:42
Propulsion Laboratory in California. 18:45
She recently said in a statement 18:49
the agency has no plans to retire the two Voyagers 18:52
as long as they are communicating with mission 18:57
members back on Earth. 19:00
Dodd said the spacecraft are currently centered on observing 19:03
how interstellar space and the heliosphere interact with each other. 19:08
We wouldn't be doing Voyager 19:15
if it wasn't taking science data, she added. 19:17
Dodd noted one reason the Voyagers have been operating 19:22
for so long is that the engineers who built them 19:26
provided multiple backup systems 19:31
to avoid future problems. 19:34
She said some who worked on Voyager in its earliest days 19:37
have even come back from retirement to pass on knowledge 19:42
to the next generation of scientists and engineers. 19:46
From where I sit as a project 19:52
manager, it's really very exciting to see young engineers 19:54
be excited to work on Voyager, Dodd said. 19:59
To take on the challenges of an old mission and to work side by side 20:04
with some of the masters, the people that built the spacecraft. 20:10
They want to learn from each other. 20:15
I'm Bryan Lynn. 20:18
Welcome to the 20:28
lesson of the day on the Learning English Podcast. 20:29
My name is Andrew Smith. 20:33
And my name is Jill Robins. 20:36
Thanks for joining us. 20:38
Today's lesson will help you learn more about the English you hear. 20:40
In our video series, let's Learn English. 20:44
The series shows animate Teo and her work and life in Washington, D.C.. 20:47
Here's Ana introducing herself. 20:52
Hello. 20:56
My name is Ana Mateo. 20:57
In our previous lesson of the day, 21:00
we heard Ana and her friend Bruna 21:03
talk about hopes and wishes. 21:06
In today's podcast lesson, we're 21:09
going to give you more ways to practice using the verb wish. 21:12
But first, let's listen to Ana and Bruna again. 21:18
This is from lesson ten of level 21:22
two of the Let's Learn English series. 21:24
Hi, Ana. 21:29
Hi, Bruna. 21:29
What's up? 21:30
I thought we could meet for lunch today. 21:31
I wish I could, but I can't. 21:33
I have to research Peru for a story. 21:36
How's it going? Not so good. 21:39
I've been reading about Peru and listening to Peruvian music. 21:42
I really want to understand Peru. 21:46
I hope it's enough. 21:50
We wish for things we can't do, have or be. 21:52
That means we wish for things 21:59
that are different from how things are now. 22:01
To show this difference, English changes 22:05
the form of the verb or modal that follows 22:08
the word wish, for example, can change 22:11
this to could have changes to had 22:15
is changes to were 22:20
was, changes to had been, and so on. 22:23
So it sounds like this. 22:28
I wish I could. 22:31
I wish I had. 22:32
I wish I were. I wish I had been. 22:33
Of course, those are not complete sentences. 22:37
So now we'll explain how you can practice 22:40
making sentences with the word wish first. 22:43
Right? 22:46
Or think of a sentence that describes a real situation in the present 22:46
or in the past. 22:51
Then use a sentence with which to express the idea 22:53
that we want a different situation. 22:57
Jill and I are going to give you some examples. 23:00
First we say one thing 23:04
and then we wish that thing were different. 23:07
Are you ready, Jill? 23:11
Ready? 23:13
I can't swim. 23:15
I wish I could swim. 23:17
I don't understand the question. 23:20
I wish I understood the question. 23:22
My head hurts. 23:25
I wish my head didn't hurt. 23:28
Okay. 23:31
Notice that after the word wish, 23:32
we use a word that sounds like we are talking about the past. 23:35
But we are not talking about the past. 23:40
Listen again to this example. 23:43
I don't understand the question. 23:47
I wish I understood the question. 23:50
The verb understand changes to understood. 23:55
But we're not talking about the past. 23:59
In fact, we want to understand the question now. 24:01
But because. 24:05
Which means that it is not possible at the present time for us to understand. 24:06
We change the verb to understood. 24:12
We could also say, I wish I could understand the question. 24:16
This change of the verb form 24:20
also happens in conditional statements, 24:23
like sentences that start with the word. 24:27
If right. 24:30
For example, we say, if I had more time, I would study more. 24:32
The verb had does not mean the past. 24:37
Instead, it shows a situation that is not real because it comes after the word. If. 24:40
Okay. 24:48
Now let's give more examples with wish. 24:49
Are you ready again, Jill? 24:53
Ready? 24:55
I didn't see the game. 24:57
I wish I had seen the game. 24:59
He is not here. 25:02
I wish he were here. 25:04
I smoke cigarets. 25:07
I wish you didn't smoke cigarets. 25:09
They talk really fast. 25:12
I wish they didn't talk so fast. 25:14
Then you are not at the party. 25:17
I wish you had been at the party. 25:20
Notice that for real statements 25:24
about what people do, we change it to negative. 25:26
When we use wish. 25:30
They talk really fast. 25:33
I wish they didn't talk so fast. 25:36
In the same way, 25:41
the negation shown by the word not disappears 25:42
when we use wish. 25:46
I didn't see the game. 25:50
I wish I had seen the game. 25:52
Now it's your turn, listeners. 25:57
We will 26:00
say a sentence about a real situation, 26:00
and then give you time to say 26:03
a sentence using the word wish. 26:06
After you will hear us say a sentence 26:10
using the word wish so you can compare your answer. 26:13
Are you ready? 26:18
Okay, here we go. 26:19
Sentence number one I can't visit my family. 26:21
I wish I could visit my family. 26:29
Sentence number two. 26:33
I don't have a car. 26:35
I wish I had a car. 26:41
Sentence number three. 26:44
He is always late. 26:46
I wish he weren't always late. 26:53
Sentence number four. 26:56
They are not here. 26:58
I wish they were here. 27:04
Sentence number five. 27:07
I didn't go to the beach. 27:09
I wish I had gone to the beach. 27:16
Sentence number six. 27:19
She didn't help me. 27:21
I wish she had helped me. 27:28
Sentence number seven. 27:31
She never talks to me. 27:32
I wish she would talk to me. 27:40
Sentence number eight. 27:42
I don't know how to swim. 27:44
I wish I knew how to swim. 27:53
Listeners, how well did you do? 27:56
Was it easy or difficult to change your sentences 27:58
and use the word wish? 28:02
There are a lot of forms to learn, 28:05
so don't worry if you could not change all the sentences, 28:08
but you can always go back and play the examples again 28:12
and try to save the sentences with the word wish. 28:17
We hope these exercises will be helpful. 28:21
Now, before we finish, here's a little chart 28:24
with more examples using the word wish. 28:28
Ready? Listen. 28:31
I can't sing, but I wish I could. 28:34
And you don't dance. But I wish you would. 28:36
You don't cook and you don't try. 28:39
I wish you would cook. And I wish you would try. 28:42
I would if I could, but I don't have the time. 28:45
I wish we had a much longer day. 28:48
I do too, but what else can we say? 28:51
How about this? 28:54
We wish we had more time with you. 28:56
We wish we did. You know it's true. 28:58
But it looks like time is running out. 29:01
So one more thing before we go. 29:04
We hope you'll write us and let us know something that you wish 29:07
that we would do to help you learn and have fun, too. 29:11
Well, we really do have to go now. 29:16
Write to us and tell us your wishes at Learning 29:19
English at VOA News.com. 29:23
And remember, you can also find us 29:27
on YouTube and Instagram and Facebook. 29:30
I'm Jill Robbins. 29:34
Thanks for listening. I'm Andrew Smith. 29:35
And that's our show for today. 29:43
But join us again tomorrow to keep learning 29:46
English on the Voice of America. 29:50
I'm Caty Weaver. 29:53
And I'm Mario Ritter Jr. 29:55

– English Lyrics

💡 "" is packed with cool phrases waiting for you in the app!
By
Viewed
8,922
Language
Learn this song

Lyrics & Translation

[English]
Welcome to Learning English,
a daily 30 minute program from the Voice of America.
I'm Caty. Weaver.
And I'm Mario Ritter Jr.
This program is designed for English learners.
So we speak a little slower, and we use words and phrases,
especially written for people learning
English.
On today's program, John Russell reports
on unmanned aircraft for agriculture.
Jill Robbins has a story about an ancient, bird like animal.
Bryan Lynn tells about the Voyager spacecraft on the science report,
then wishing on lesson of the day.
But first.
American companies are developing
unmanned aircraft systems that are larger than drones.
The goal is for the aircraft to help agricultural producers
and reduce risks to human safety.
When Hector Xue was learning
to pilot a helicopter in college,
he remembered having a few bad experiences while flying at night.
The experiences led him
to research unmanned aircraft systems
while getting his doctorate at Massachusetts Institute of Technology.
Then, Xu formed Rotor Technologies in 2021
to develop unmanned helicopters.
Roder has built two autonomous helicopters
that the company calls Spray Hawks.
Roder aims to have as many as 20
spray hawks ready for market next year.
The company also is developing
helicopters that would fly shipments into disaster areas
and to oil rigs in oceans.
The helicopters could also be used to fight wildfires.
For now, Roder is paying attention to agriculture.
The industry has accepted automation
with drones, but sees unmanned helicopters
as a better way to spray larger areas
with pesticides and fertilizers.
A major appeal of automation
in agriculture flights is safety,
because special airplanes, called crop
dusters, fly at around 240km/h
and only about three meters off the ground.
There are tens of accidents each year.
The small planes hit power lines,
cell towers and other planes.
Older planes in disrepair and pilot
tiredness play a part in accidents.
2014 report from the
National Transportation Safety Board found
there were more than 800 agriculture flight accidents
between 2001 and 2010,
including 81 that were deadly.
A separate report from the National Agriculture Aviation Association
found nearly 640 accidents from 2014
until this month, with 109 deaths.
It is a very, very dangerous profession,
said Dan Martin, a research engineer with the US Department
of Agriculture's Agriculture Research Service.
Martin said about the pilots,
they make all their money in those short few months.
So sometimes it may mean that they fly
10 to 12 hours a day or more.
Job risks also include possible contact
with farming, chemicals in recent years.
Safety and cost concerns have led to a number of drones
flying above farmers fields, Martin said.
He added that some 10,000 drones
will likely be sold this year alone.
It's growing exponentially as a market
super fast, Martin said.
But the size of the drones means they only can cover
a small amount of the area that a plane or helicopter can.
The limitation is
providing an opening for companies building bigger unmanned aircraft
like Rotor and another company, Pica.
California based Pica announced in August
that it had sold its first autonomous electric aircraft
for crop protection, and to a buyer in the United States.
Pikas.
Pelican spray, a fixed wing aircraft, received
official approval last year to fly for crop protection.
The company also sold its Pelican
spray to Dole for use in Honduras
and to the Brazilian company SLC Agricola.
Lucas Coke is chief technology officer
at Hainan Brothers Agro Services.
The company which but the Pelicans prey in August.
Coke has called unmanned aircraft
part of a coming revolution
that will save farmers money and increase safety.
The Kansas based company operates out of airports
from Texas to Illinois.
Coke does not see the unmanned aircraft
replacing all the company's pilots,
but rather taking over the riskiest jobs.
The biggest draw
is taking the pilot out of the aircraft inside
of those most dangerous situations, cook said.
But Coke also says that autonomous aviation systems
could bring new dangers to an already busy airspace.
Still, the risk is
less of a concern in rural areas,
with plenty of open space and fewer people.
Companies like rotor have developed
their systems to work if bad events come up.
Rotors helicopter, for example,
has a half dozen communications systems
and for now, a remote pilot in control.
If the ground team loses contact with the helicopter,
rotor has a system to deal with the problem.
The system makes sure the engine can be turned off,
and the helicopter can perform a controlled landing.
The safety measures will go a long way to helping the company receive
what it expects will be official government
approval to fly its helicopters for business purposes
once the company has approval.
The difficulty, as Xu sees it, will be building more devices
to meet the demand in the United States and Brazil.
I'm John Russell.
The brains
of today's birds show a level of intelligence
and behavioral complexity
rivaled only by mammals.
But scientists do not fully understand how bird brains have changed
over millions of years from the form they had as dinosaurs.
That understanding is now growing
thanks to a fossil discovery in Brazil.
Researchers unearthed the remains, or fossil, of a head, bone
or skull of a bird species not known before
it has been named.
Another witness, Hestia.
The fossil was in such good condition that scientists were able
to create a computer image of its brain
and inner ear structures, as
it lived in a dry area about 80 million years ago,
during the Cretaceous period, near the end of the age of dinosaurs.
This finding is one of a kind, said University of Cambridge
fossil expert Guillermo Avalon, a lead researcher of the study.
It appeared this month
in the publication Nature.
Birds developed from small feathered dinosaurs
during the Jurassic period.
The novel Ana's Discovery
filled in a 70 million year gap in the understanding of the development
of the bird dating back to the earliest known bird,
Archaeopteryx.
It lived about 150 million years ago
in what is now Europe.
The researchers said
the novel Ana's Skull has a bill
and is shaped like modern birds.
Its brain shows both modern and ancient elements,
and some that are in between.
Luis Chiapas
is a fossil scientist at the Natural History Museum of Los
Angeles County in California, and a co-writer of the study.
He said scientists
rarely find such skulls of early birds,
and this one is the best preserved ever.
Daniel Field is a fossil scientist
at the University of Cambridge and the study's lead writer.
He said scientists have long struggled to understand how
and when the brains and intelligence of birds developed.
The field has been awaiting
the discovery of a fossil exactly like this one.
He said
the novel Ana's brain, measuring about ten millimeters
across, is smaller relative to skull size
than that of modern birds,
but the skull is larger
and more complex than that of Archaeopteryx.
Its cerebellum, a brain structure
that in living birds helps with motor control during flight,
was smaller than in today's bird species
and more like Archaeopteryx is,
but its brain was connected to the spinal cord
in a way similar to modern birds as well as humans.
It was unlike Archaeopteryx
and the dinosaurs from which birds evolved.
Nervousness also had something special its inner ear organ for
balance is larger than in any other known bird.
The fossil included 80%
of the birds bone structure or skeleton.
The scientists say they believe the bird could fly well
based on their examination of the remains.
Field said, if you gave it a quick look,
you might think it was like a living bird.
But a closer look would show you some important differences,
like claws coming out of its wings.
I'm Jill Robins.
NASA has once again reconnected
with its Voyager spacecraft, marking a continuous portion
of the American space agency's longest mission in history.
The two spacecraft, Voyager one and Voyager two,
launched within weeks of each other in 1977,
so they have been operating for more than 47 years.
NASA officials have reported several difficulties
with the spacecraft in recent years,
mainly communication issues.
The most recent problems involved
the Voyager one spacecraft,
NASA said in a statement in April.
It had remained out of touch with the spacecraft
for the previous five months.
Agency officials said they later learned
the problem was linked to a chip inside
one of Voyager One's onboard computers.
The issue may data being sent
by the spacecraft unreadable.
NASA said its engineers were able to fix that problem
by making changes to how the spacecraft stores and reads data.
Then in October,
NASA reported another communication issue
that resulted in a brief delay
in receiving data from Voyager one.
That problem turned out to be linked to the spacecraft's
radio transmitter system.
The agency said that
for some reason, Voyager one's fault
protection system was activated when NASA sent a command
for the spacecraft to turn on one of its heaters.
This activation, meant to save power,
led Voyager one to start sending signals
to a different radio transmitter system.
Then it normally uses.
This meant NASA had to listen
for the signals on the S-band instead of the usual X-band.
Once they did this, they were able
to start receiving data again.
NASA has said the S-band is much weaker
than the X-band, so engineers were seeking
to get the X-band radio communication system
back online for long term use.
NASA said the agency had not used
the S-band since 1981.
Voyager one and Voyager two are NASA's
most distant operating spacecraft.
The agency has reported Voyager one is exploring space
from about 24,000,000,000km from Earth,
while Voyager two is operating
from about 20.5 billion kilometers away.
Because of this great distance, NASA says its communication
with the two Voyagers takes about one day to receive data
and another day to send information back from Earth.
The two Voyagers were first
designed to explore Jupiter and Saturn.
Both spacecraft successfully
carried out studies of those planets.
Later, Voyager two made the first ever
close observations of Uranus and Neptune.
In 1989.
The two spacecraft then began a new mission
to explore distant areas of space.
In 2013, NASA
announced Voyager one had crossed over the border
dividing our solar system from Interstate stellar space.
The term interstellar means between stars.
Scientists say interstellar
space begins where the sun's continuous flow of particles
and its magnetic field stop.
Voyager two first entered
interstellar space in 2018.
NASA said the spacecraft was more than 17.7
billion kilometers from the sun at the time.
Both Voyagers are the only spacecraft so far
to explore interstellar space.
The space agency says the Voyagers are studying
how the interstellar medium interacts with the solar wind.
Solar wind is the continuous flow
of charged particles released by the sun.
The spacecraft have also provided data on the heliosphere,
a kind of protective bubble around our solar system.
Suzanne Dodd is the current project manager
for the Voyager mission at NASA's Jet
Propulsion Laboratory in California.
She recently said in a statement
the agency has no plans to retire the two Voyagers
as long as they are communicating with mission
members back on Earth.
Dodd said the spacecraft are currently centered on observing
how interstellar space and the heliosphere interact with each other.
We wouldn't be doing Voyager
if it wasn't taking science data, she added.
Dodd noted one reason the Voyagers have been operating
for so long is that the engineers who built them
provided multiple backup systems
to avoid future problems.
She said some who worked on Voyager in its earliest days
have even come back from retirement to pass on knowledge
to the next generation of scientists and engineers.
From where I sit as a project
manager, it's really very exciting to see young engineers
be excited to work on Voyager, Dodd said.
To take on the challenges of an old mission and to work side by side
with some of the masters, the people that built the spacecraft.
They want to learn from each other.
I'm Bryan Lynn.
Welcome to the
lesson of the day on the Learning English Podcast.
My name is Andrew Smith.
And my name is Jill Robins.
Thanks for joining us.
Today's lesson will help you learn more about the English you hear.
In our video series, let's Learn English.
The series shows animate Teo and her work and life in Washington, D.C..
Here's Ana introducing herself.
Hello.
My name is Ana Mateo.
In our previous lesson of the day,
we heard Ana and her friend Bruna
talk about hopes and wishes.
In today's podcast lesson, we're
going to give you more ways to practice using the verb wish.
But first, let's listen to Ana and Bruna again.
This is from lesson ten of level
two of the Let's Learn English series.
Hi, Ana.
Hi, Bruna.
What's up?
I thought we could meet for lunch today.
I wish I could, but I can't.
I have to research Peru for a story.
How's it going? Not so good.
I've been reading about Peru and listening to Peruvian music.
I really want to understand Peru.
I hope it's enough.
We wish for things we can't do, have or be.
That means we wish for things
that are different from how things are now.
To show this difference, English changes
the form of the verb or modal that follows
the word wish, for example, can change
this to could have changes to had
is changes to were
was, changes to had been, and so on.
So it sounds like this.
I wish I could.
I wish I had.
I wish I were. I wish I had been.
Of course, those are not complete sentences.
So now we'll explain how you can practice
making sentences with the word wish first.
Right?
Or think of a sentence that describes a real situation in the present
or in the past.
Then use a sentence with which to express the idea
that we want a different situation.
Jill and I are going to give you some examples.
First we say one thing
and then we wish that thing were different.
Are you ready, Jill?
Ready?
I can't swim.
I wish I could swim.
I don't understand the question.
I wish I understood the question.
My head hurts.
I wish my head didn't hurt.
Okay.
Notice that after the word wish,
we use a word that sounds like we are talking about the past.
But we are not talking about the past.
Listen again to this example.
I don't understand the question.
I wish I understood the question.
The verb understand changes to understood.
But we're not talking about the past.
In fact, we want to understand the question now.
But because.
Which means that it is not possible at the present time for us to understand.
We change the verb to understood.
We could also say, I wish I could understand the question.
This change of the verb form
also happens in conditional statements,
like sentences that start with the word.
If right.
For example, we say, if I had more time, I would study more.
The verb had does not mean the past.
Instead, it shows a situation that is not real because it comes after the word. If.
Okay.
Now let's give more examples with wish.
Are you ready again, Jill?
Ready?
I didn't see the game.
I wish I had seen the game.
He is not here.
I wish he were here.
I smoke cigarets.
I wish you didn't smoke cigarets.
They talk really fast.
I wish they didn't talk so fast.
Then you are not at the party.
I wish you had been at the party.
Notice that for real statements
about what people do, we change it to negative.
When we use wish.
They talk really fast.
I wish they didn't talk so fast.
In the same way,
the negation shown by the word not disappears
when we use wish.
I didn't see the game.
I wish I had seen the game.
Now it's your turn, listeners.
We will
say a sentence about a real situation,
and then give you time to say
a sentence using the word wish.
After you will hear us say a sentence
using the word wish so you can compare your answer.
Are you ready?
Okay, here we go.
Sentence number one I can't visit my family.
I wish I could visit my family.
Sentence number two.
I don't have a car.
I wish I had a car.
Sentence number three.
He is always late.
I wish he weren't always late.
Sentence number four.
They are not here.
I wish they were here.
Sentence number five.
I didn't go to the beach.
I wish I had gone to the beach.
Sentence number six.
She didn't help me.
I wish she had helped me.
Sentence number seven.
She never talks to me.
I wish she would talk to me.
Sentence number eight.
I don't know how to swim.
I wish I knew how to swim.
Listeners, how well did you do?
Was it easy or difficult to change your sentences
and use the word wish?
There are a lot of forms to learn,
so don't worry if you could not change all the sentences,
but you can always go back and play the examples again
and try to save the sentences with the word wish.
We hope these exercises will be helpful.
Now, before we finish, here's a little chart
with more examples using the word wish.
Ready? Listen.
I can't sing, but I wish I could.
And you don't dance. But I wish you would.
You don't cook and you don't try.
I wish you would cook. And I wish you would try.
I would if I could, but I don't have the time.
I wish we had a much longer day.
I do too, but what else can we say?
How about this?
We wish we had more time with you.
We wish we did. You know it's true.
But it looks like time is running out.
So one more thing before we go.
We hope you'll write us and let us know something that you wish
that we would do to help you learn and have fun, too.
Well, we really do have to go now.
Write to us and tell us your wishes at Learning
English at VOA News.com.
And remember, you can also find us
on YouTube and Instagram and Facebook.
I'm Jill Robbins.
Thanks for listening. I'm Andrew Smith.
And that's our show for today.
But join us again tomorrow to keep learning
English on the Voice of America.
I'm Caty Weaver.
And I'm Mario Ritter Jr.

Key Vocabulary

Start Practicing
Vocabulary Meanings

designed

/dɪˈzaɪnd/

B1
  • verb
  • - to plan and make something

learners

/ˈlɜːnərz/

A2
  • noun
  • - people who are learning something

reports

/rɪˈpɔːrts/

B1
  • noun
  • - accounts given to someone
  • verb
  • - to give an account of something

ancient

/ˈeɪnʃənt/

B2
  • adjective
  • - very old

aircraft

/ˈeəkˌræft/

B1
  • noun
  • - a vehicle that flies

agriculture

/ˈæɡrɪkʌltʃər/

B1
  • noun
  • - the science or practice of farming

safety

/ˈseɪfti/

A2
  • noun
  • - the state of being safe

pilots

/ˈpaɪləts/

B1
  • noun
  • - people who fly aircraft

experiences

/ɪkˈspɪəriənsɪz/

B1
  • noun
  • - events or things that happen to someone

research

/rɪˈsɜːrtʃ/

B2
  • noun
  • - a careful study of something
  • verb
  • - to make a careful study of something

autonomous

/ɔːˈtɒnəməs/

C1
  • adjective
  • - able to operate independently

automation

/ˌɔːtəˈmeɪʃən/

B2
  • noun
  • - the use of machines to do work

pesticides

/ˈpestɪsaɪdz/

B2
  • noun
  • - chemicals used to kill pests

fertilizers

/ˈfɜːrtɪlaɪzərz/

B1
  • noun
  • - chemicals used to help plants grow

accidents

/ˈæksɪdənts/

A2
  • noun
  • - unintentional events causing harm

disrepair

/dɪsriˈpeər/

C1
  • noun
  • - a state of being in bad condition

deadly

/ˈdedli/

B2
  • adjective
  • - causing death

💡 Which new word in “” caught your eye?

📱 Open the app to check meanings, build sentences, and try them out in real convos!

Key Grammar Structures

  • So we speak a little slower, and we use words and phrases, especially written for people learning English.

    ➔ Adverbs of degree (a little), comparative adjectives (slower), and the adverb 'especially' to modify an adjective.

    ➔ The sentence demonstrates how the program adjusts its pace and vocabulary for learners. “A little” modifies “slower” indicating a slight reduction in speed. “Especially” highlights that the vocabulary is *particularly* designed for English learners.

  • This program is designed for English learners.

    ➔ Passive voice ('is designed') and prepositional phrase ('for English learners').

    ➔ The passive voice emphasizes the action being done *to* the program, rather than who is doing the designing. The phrase 'for English learners' specifies the target audience.

  • So we speak a little slower, and we use words and phrases, especially written for people learning English.

    ➔ Use of 'especially' as an adverb modifying the past participle 'written'.

    ➔ The word 'especially' emphasizes that the words and phrases are *particularly* created for the needs of English learners. It modifies 'written', indicating the specific quality of the vocabulary.

  • But first. American companies are developing unmanned aircraft systems that are larger than drones.

    ➔ Relative clause ('that are larger than drones') modifying 'unmanned aircraft systems'.

    ➔ The relative clause provides additional information about the unmanned aircraft systems, specifying that they are bigger in size compared to typical drones.

Related Songs