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Welcome to Learning English, 00:03
a daily 30 minute program from the Voice of America. 00:06
I'm Ashley Thompson. 00:10
And I'm Mario Ritter junior. 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
Today 00:31
you will hear reports from Anna Matteo and Jill Robbins. 00:32
Later, Bryan Lynn presents this week's Science Report. 00:37
We close the show with the next part 00:42
of our National Parks series. 00:44
Today we visit the world 00:47
famous Grand Canyon National Park. 00:50
But first, 00:54
a new study finds that the glaciers 00:56
across the Andes in South America 00:59
are shrinking at a speed not seen before 01:03
in the history of human civilization. 01:07
This discovery surprised scientists. 01:11
At first, they only planned to study 01:16
the current conditions of glaciers 01:20
and how they changed through history. 01:23
We thought this result was decades 01:27
away, said Andrew Goren 01:30
as lead writer of the study. 01:35
He first thought the results were an accident, 01:37
but later he and his team 01:43
confirmed the results with more samples. 01:45
Goren said that the shrinking of glaciers 01:51
is happening even faster than experts had thought. 01:54
He and a team of scientists carbon dated bedrock 02:00
that had been recently exposed 02:05
by shrinking glaciers. 02:08
They measured beryllium ten 02:11
and carbon 14 nuclide levels 02:14
and found that concentrations 02:18
were nearly zero. 02:20
He explained that 02:24
if the rock can see the sky, 02:26
it collects these new Clyde's. 02:29
He added that the decay rate of these new Clyde's 02:32
shows that the rock had not been exposed 02:37
during the Holocene era. 02:41
This era dates back 02:45
11,700 years, but could go back even further. 02:47
I would bet my whole life savings 02:55
that in fact, these glaciers are smaller than they've been 02:58
since the last interglacial period, Goren said. 03:03
The last interglacial period 03:08
ended about 115,000 years ago. 03:12
The study collected data 03:18
at four glaciers across the Andes. 03:20
These glaciers make up 99% 03:25
of the world's tropical glaciers. 03:29
They are more affected by changing weather 03:33
because they are regularly at 03:36
or near freezing point. 03:39
We think this is the canary in the coal mine 03:43
that this is going to happen everywhere. 03:48
Before long and maybe sooner than we thought, Goren said. 03:50
Canary in the coal mine is an expression that warns of danger. 03:57
Coal miners would use a canary to tell 04:02
if the oxygen levels in a coal mine were dangerous. 04:06
Researchers published the new study 04:12
in the journal Science on August 1st. 04:14
I'm on a Mateo. 04:18
Mom. Young son had low expectations 04:45
for the subtropical bananas he planted in a community farm. 04:48
And saw 04:52
he must use a greenhouse for part of the year 04:54
to protect them from South Korea's cold winters. 04:57
But warmer temperatures due to climate change 05:02
have produced a welcome surprise in the form of flowers and fruit 05:06
in the land area where subtropical crops are grown in South Korea 05:10
has increased from about 295 hectares 05:16
in 2021 to 3306 hectares in 2023. 05:19
South Korea's state agricultural organization, the Rural Development 05:27
Administration, reports that there are 67 banana 05:31
farms in the South, and Ma is among a growing number of farmers 05:35
experimenting with crops usually grown in a warmer climate. 05:41
I want to try growing other tropical crops to. 05:46
So as you can see here, I have planted these papaya trees as well, 05:50
Ma said, pointing to a small papaya plant. 05:54
Ma opened up part of his family's farm 05:59
to people from the city in 2006. 06:02
He is happy about his small success, 06:06
but he worries about what it means for the climate. 06:09
I feel that the climate crisis has become very serious, said Ma, 06:13
who has been a farmer for 25 years. 06:17
South Korea lies in the temperate 06:21
zone and has four seasons, but its climate appears 06:23
to be getting warmer and wetter throughout the year. 06:27
The Korea meteorological administration reports 06:31
that since 2012, the average 06:36
yearly temperature has been continually rising. 06:39
The average temperature last year of 13.7°C 06:43
was the highest since its records began 06:48
in 1973. 06:51
Rainfall during last year's rainy season 06:54
was 660.2mm nationwide, 06:57
nearly two times the 356.7mm annual average. 07:02
Figure. 07:07
Kim Kwang soo is a professor of agriculture 07:09
and life sciences at Seoul National University. 07:12
Kim said South Korea's climate conditions 07:17
were becoming more like subtropical areas, so it is important for farmers 07:20
to find the right crop varieties for the climate. 07:25
Tropical and subtropical fruit 07:29
are usually expensive in South Korea, so shoppers 07:31
should welcome the less costly local produce. 07:35
My kids love bananas, 07:39
so it would be good if we harvest bananas in this country, said Kim Ji eun, 07:41
who was purchasing imported bananas in a Seoul supermarket. 07:46
I'm Jill Robins. 07:50
And. Two American astronauts 08:07
could remain at the International Space Station I.s.s. 08:14
until February. 08:20
If the spacecraft that transported them cannot be fixed. 08:21
To safely bring them home, the U.S. 08:27
space agency NASA said last week 08:31
it had not yet made return plans for astronauts 08:35
Butch Wilmore and Sonny Williams. 08:40
The two have been aboard the I.s.s. 08:43
since June 6th. 08:47
The American astronauts were expected 08:50
to stay in space for only a week, 08:53
but technical issues with the Boeing built 08:56
Starliner spacecraft have so 09:00
far prevented a return trip. 09:03
The trip that carried Wilmore 09:07
and Williams was a test flight for Starliner. 09:09
That marked the first time the spacecraft 09:13
successfully carried astronauts to space. 09:17
NASA officials held 09:22
a news conference Wednesday to discuss 09:24
the ongoing situation with Starliner 09:27
and the astronauts at the I.s.s.. 09:31
They said the agency is still working with Boeing 09:35
to find a solution for the spacecraft's technical difficulties. 09:40
Investigations have centered 09:46
on helium leaks and thruster problems with Starliner, 09:49
but if those issues cannot be resolved in the coming weeks, 09:55
NASA said it could decide to use 10:01
space XS Crew Dragon spacecraft 10:04
to bring the astronauts back to Earth. 10:08
NASA has been using SpaceX XS Crew Dragon 10:12
to regularly carry astronauts and supplies 10:16
to the ISS since 2020. 10:20
If NASA decides to use Crew Dragon, 10:24
it said it would leave two of four seats open 10:28
during the spacecraft its next planned launch to the I.s.s. 10:33
in late September. 10:38
Wilmore and Williams would then make the trip back to Earth with Crew Dragon. 10:40
NASA officials told 10:47
reporters they had brought in additional experts 10:49
to examine Starliner's leak issues and thruster failures. 10:53
At the same time, the space agency 11:00
is looking more closely at space X 11:03
as a backup solution to get the astronauts back home. 11:07
The agency's space operations 11:12
mission chief Ken Bowersox said NASA's 11:16
current thinking is that we could take either path. 11:20
He added that during a recent meeting, we heard from a lot of folks 11:25
that had concern, and the decision was not clear. 11:31
NASA has said a final decision 11:36
should be made by mid-August. 11:39
Boeing representatives did not take part in the news conference, 11:43
but the company issued a brief statement 11:48
Wednesday repeating its position 11:50
that Starliner could still be fixed 11:54
to safely transport the astronauts. 11:57
We still believe in Starliner's capability 12:00
and its flight rationale, Boeing said. 12:04
The Boeing statement said if 12:09
NASA did decide to change Starliner's mission, 12:12
the company would take the actions necessary 12:17
to configure Starliner for an uncrewed return. 12:20
Steve Stich is the commercial crew 12:26
program manager for NASA. 12:29
He said the agency was not seriously considering 12:32
launching a separate space flight 12:37
to pick up Wilmore and Williams. 12:41
Officials said tests run 12:44
by Boeing and NASA on Earth 12:47
have reproduced Starliner thruster problems. 12:50
This has suggested to engineers a possible issue 12:55
with the thrusters seals. 13:00
But Stich noted it was not clear 13:03
what is causing the seal issues. 13:06
The thrusters are important for permitting Starliner 13:10
to back away from the I.s.s. 13:15
during its separation operations. 13:18
At the same time, engineers are seeking 13:21
to find the cause of helium leaks 13:24
in the spacecraft's propulsion system. 13:28
The first leak happened before the launch, 13:32
but more appeared during flight. 13:35
Boeing has faced repeated delays 13:38
as it struggles to complete NASA's flight testing process before 13:42
it can receive approval to start running 13:48
official trips to the I.s.s.. 13:51
I'm Bryan Lynn. 13:55
Bryan Lynn is 14:13
here now to talk more about his science report. 14:14
Thanks for joining me, Bryan . 14:18
Sure. 14:20
Ashley, it's good to be here. 14:20
This week you reported on plans NASA is considering 14:23
for how to bring a pair of astronauts home 14:28
from the International Space Station. 14:32
Their return has been delayed because of problems 14:36
with Boeing's Starliner spacecraft. 14:40
Have the astronauts themselves made any statements about their current situation? 14:44
Yeah, so there had been a couple of live news conferences 14:50
the two astronauts have taken part in during their stay on the I.s.s.. 14:54
One of those happened just about a month ago. 14:59
And it was interesting to me that during this conference, 15:02
the astronauts talked about all the things 15:06
they were doing to help get things ready for the trip home. 15:08
So far, we've heard a lot from NASA and Boeing officials 15:13
about the steps they're taking to fix the spacecraft difficulties, 15:17
but the astronauts said they are also taking part 15:22
in these efforts as much as they can every day. 15:25
What sorts of 15:30
things have they said they have been doing? 15:31
So one of the things astronaut Sonny Williams said they've been doing 15:34
is supporting the work of technical teams 15:39
seeking to resolve starliner's problems. 15:42
That effort has involved many people on the ground, 15:46
but the astronauts aboard the station have also been carrying out safety tests, 15:49
for example, and coordinating important updates for the spacecraft. 15:55
Now, Starliner only carried two people in this test flight, 16:00
but is designed to support four astronauts. 16:05
So another thing they did was to put two additional astronauts staying at the 16:09
ISS into the capsule and performed 16:14
some tests with the spacecraft. 16:17
The original plan for these two astronauts 16:21
was to spend only about a week at this. 16:24
What are they saying about being delayed there now 16:29
for over two months with no new return date set? 16:32
Well, both of the astronauts 16:38
have said this delay was not totally unexpected, 16:40
and they've emphasized this was only a test flight 16:44
which was carried out. 16:47
Of course, to learn more about the Starliner spacecraft 16:49
and all flight processes. 16:52
And the pair also noted that if NASA had found another flight home 16:55
for them, perhaps with SpaceX's Crew Dragon rocket, that would have been okay. 17:00
But they also said that would not have been the best solution, 17:06
because there is so much they feel they can do from the i.s.s. 17:10
to support the current troubleshooting efforts on Earth. 17:15
And they said so much more is being learned 17:19
by them remaining in space. 17:22
All right. 17:26
Thanks again 17:27
for joining me on the podcast, Bryan , and thank you for your science report. 17:27
You're very welcome, Ashley. 17:33
Thank you. 17:35
VOA Learning English 17:38
has launched a new program for children. 17:39
It is called Let's Learn English with Ana. 17:43
The new course aims to teach children American English 17:46
through asking and answering questions 17:51
and experiencing fun situations. 17:54
For more information, visit our website. 17:57
Learning English. 18:00
VOA News.com. 18:01
Our national parks journey continues 18:15
with one of the most popular and beautiful places in America. 18:18
Grand Canyon National Park in the state of Arizona. 18:24
The Grand Canyon is one of the seven natural wonders of the world, 18:29
and one of the largest canyons on Earth. 18:34
It stretches for 450km. 18:37
Parts of the canyon are more than 30km wide 18:42
and one kilometer deep. 18:46
Many writers have tried 18:50
to describe the wonder of the Grand Canyon. 18:51
They use words like mysterious, 18:55
overpowering, and strange. 18:58
But it is not possible to put human meaning to such a place. 19:01
The Grand Canyon truly is beyond words. 19:07
Is this your first time at the Grand Canyon? yes. 19:14
And what do you think? 19:18
Do you have a few words to describe them? 19:19
Beautiful. 19:22
amazing. 19:23
What do you think of the Grand Canyon? 19:25
Oh, very huge and very colorful. 19:29
Do you have some. 19:37
Words to describe what you're seeing? 19:38
Amazing. It's so amazing. 19:40
When I see it at the first look. 19:42
The canyons of America's southwest 19:48
are deep, ancient openings in the Earth. 19:52
They look as if they formed as the Earth 19:55
split apart in reality. 19:58
Rivers formed these canyons 20:02
40 million years ago. 20:05
The Colorado River began cutting through the area 20:07
around the present day Grand Canyon. 20:11
The river carried dirt and pieces of stone 20:15
that slowly ate away at the surrounding rock. 20:19
It left a pathway of enormous rock openings. 20:23
At the same time, forces deep within 20:28
the Earth pushed up the surrounding land. 20:32
Rain, snow, ice, wind, and plant roots 20:35
rubbed away at the top of this new canyon below. 20:40
The river continued to uncover more 20:45
and more levels of ancient rock. 20:48
Some of the exposed rocks along the Grand Canyon 20:51
walls are nearly 2 billion years old. 20:55
They are among the oldest rocks on Earth, with many levels of granite, 21:00
schist, limestone, and sandstone. 21:05
The Grand Canyon measures 2500m 21:11
from the canyon floor to its highest point. 21:15
Because of its size. 21:19
The weather at the top of the canyon is often much different from the bottom. 21:22
On some winter days. 21:28
For example, you may find cold winds 21:29
and snow at the top, 21:33
but at the bottom of the canyon 21:36
you may find warm winds and flowers. 21:38
The Grand Canyon is home to some 2000 plant species. 21:43
Some of these species can only be found in the park. 21:49
The park is also home to more 21:54
than 370 species of birds, 90 kinds of mammals 21:56
and 40 kinds of reptiles. 22:02
Many of the birds spend their whole lives in the Grand Canyon. 22:05
Other species depend on the Grand Canyon 22:11
for food and shelter during large migrations. 22:14
The Grand Canyon was named a 22:19
Globally Important Bird Area in 2014 22:21
because of the role it plays in protecting 22:26
many species of birds. 22:29
Native Americans occupied the Grand Canyon 22:33
3000 years ago. 22:36
Bones, hair, feathers, 22:39
and the remains of plants have been found in deep, dry caves. 22:42
High in the rock walls, the Hopi, Paiute, 22:48
Navajo, and other Native American tribes 22:53
have all been in the area for at least 700 years. 22:58
In 1869, American John 23:03
Wesley Powell explored the Grand Canyon. 23:07
He recorded much of what we know today about the area. 23:12
Powell and his group traveled 23:17
in four boats along the Colorado River. 23:19
He and his group of explorers knew very little 23:23
about getting over the vast, rocky waters of the Colorado River. 23:27
In many places, boats 23:33
could be turned over by giant waves. 23:35
Soon after they started their journey, Powell 23:39
s group lost some of its food and equipment. 23:42
Three members decided to leave the group 23:47
as they walked up and out of the Grand Canyon. 23:51
They were killed by Native Americans. 23:54
The rest of Powell's group 23:58
survived the journey, starved and tired. 24:00
Powell and his group reached the end of the canyon. 24:04
They had traveled by boat down the Colorado 24:08
for more than three months. 24:11
John Wesley Powells reports and maps from the trip 24:14
greatly increased interest in the Grand Canyon, 24:19
but visitors did not begin to go there 24:23
in large numbers until 1901. 24:26
That year, a railway was built 24:30
that reached the area. 24:32
5 million people 24:40
visit the Grand Canyon every year. 24:41
The first sight of the canyon can leave 24:45
visitors speechless. 24:48
Depending on the time of day. 25:02
The sun lights up the rock walls in red, 25:04
orange and golden colors. 25:08
The bright colors are the result 25:11
of minerals in the rock. 25:13
Their appearance changes endlessly 25:16
with the light, the time of year and the weather 25:20
at sunset. 25:25
The canyon walls display fiery red and gold hues. 25:26
Then they take on softer colors of blue, 25:32
purple, and green. 25:36
Most visitors 25:44
walk along paths partway down the canyon. 25:45
It takes several hours to walk to the bottom, 25:50
and even longer to climb back up. 25:53
Some visitors choose to ride 25:58
mules to the bottom of the canyon. 26:00
Mules are strong, sturdy animals 26:03
that look similar to horses. 26:06
Visitors can also explore 26:10
the Grand Canyon in other ways. 26:12
Hundreds of thousands of people 26:16
see the canyon by air each year. 26:18
They pay a helicopter or airplane pilot 26:22
to fly them above and around the canyon. 26:25
Thousands of people every year choose 26:29
to explore the Grand Canyon by boat from the Colorado River. 26:32
These trips last 1 to 3 weeks. 26:38
Most people who 26:43
come to the Grand Canyon National Park visit 26:44
an area known as the South Rim. 26:48
That area has shuttle busses 26:52
that take visitors to overlooks. 26:54
Fewer people see the canyon from the North Rim. 26:58
The North Rim is less than 20km 27:03
across the canyon from the South Rim. 27:06
But visitors must drive 27:10
more than 350km by car 27:12
from the South Rim to access the North Rim. 27:16
Visitors can also see the Grand Canyon 27:21
from a huge glass walkway called the skywalk. 27:24
The skywalk is on the Hualapai Indian Reservation 27:29
in the western part of the canyon. 27:34
The Hualapai Indians built it 27:37
to increase tourism at the reservation. 27:39
It opened in 2007. 27:43
The skywalk extends more than 27:46
20m from the canyon's rim. 27:48
It is suspended. 27:52
More than 1200m above the bottom of the canyon, 27:54
and is shaped like a giant horseshoe. 27:59
Many call the skywalk an engineering wonder, 28:03
but others have criticized the skywalk and its development. 28:07
They say it reduces the enjoyment 28:12
of nature in the Grand Canyon. 28:15
For visitors hoping to get a view of the entire Grand 28:19
Canyon, they will have to travel well 28:23
beyond the state of Arizona. 28:26
The only place to see the entire canyon 28:29
at once is from outer space. 28:32
I'm Ashley Thompson. 28:36
And I'm Jonathan Evans. 28:39
And that's our program for today. 29:12
Join us again tomorrow to keep learning 29:14
English through stories from around the world. 29:17
I'm Ashley Thompson. 29:20
And I'm Mario Ritter, junior. 29:22
29:33
29:36
29:45
29:50

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[English]
Welcome to Learning English,
a daily 30 minute program from the Voice of America.
I'm Ashley Thompson.
And I'm Mario Ritter junior.
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.
Today
you will hear reports from Anna Matteo and Jill Robbins.
Later, Bryan Lynn presents this week's Science Report.
We close the show with the next part
of our National Parks series.
Today we visit the world
famous Grand Canyon National Park.
But first,
a new study finds that the glaciers
across the Andes in South America
are shrinking at a speed not seen before
in the history of human civilization.
This discovery surprised scientists.
At first, they only planned to study
the current conditions of glaciers
and how they changed through history.
We thought this result was decades
away, said Andrew Goren
as lead writer of the study.
He first thought the results were an accident,
but later he and his team
confirmed the results with more samples.
Goren said that the shrinking of glaciers
is happening even faster than experts had thought.
He and a team of scientists carbon dated bedrock
that had been recently exposed
by shrinking glaciers.
They measured beryllium ten
and carbon 14 nuclide levels
and found that concentrations
were nearly zero.
He explained that
if the rock can see the sky,
it collects these new Clyde's.
He added that the decay rate of these new Clyde's
shows that the rock had not been exposed
during the Holocene era.
This era dates back
11,700 years, but could go back even further.
I would bet my whole life savings
that in fact, these glaciers are smaller than they've been
since the last interglacial period, Goren said.
The last interglacial period
ended about 115,000 years ago.
The study collected data
at four glaciers across the Andes.
These glaciers make up 99%
of the world's tropical glaciers.
They are more affected by changing weather
because they are regularly at
or near freezing point.
We think this is the canary in the coal mine
that this is going to happen everywhere.
Before long and maybe sooner than we thought, Goren said.
Canary in the coal mine is an expression that warns of danger.
Coal miners would use a canary to tell
if the oxygen levels in a coal mine were dangerous.
Researchers published the new study
in the journal Science on August 1st.
I'm on a Mateo.
Mom. Young son had low expectations
for the subtropical bananas he planted in a community farm.
And saw
he must use a greenhouse for part of the year
to protect them from South Korea's cold winters.
But warmer temperatures due to climate change
have produced a welcome surprise in the form of flowers and fruit
in the land area where subtropical crops are grown in South Korea
has increased from about 295 hectares
in 2021 to 3306 hectares in 2023.
South Korea's state agricultural organization, the Rural Development
Administration, reports that there are 67 banana
farms in the South, and Ma is among a growing number of farmers
experimenting with crops usually grown in a warmer climate.
I want to try growing other tropical crops to.
So as you can see here, I have planted these papaya trees as well,
Ma said, pointing to a small papaya plant.
Ma opened up part of his family's farm
to people from the city in 2006.
He is happy about his small success,
but he worries about what it means for the climate.
I feel that the climate crisis has become very serious, said Ma,
who has been a farmer for 25 years.
South Korea lies in the temperate
zone and has four seasons, but its climate appears
to be getting warmer and wetter throughout the year.
The Korea meteorological administration reports
that since 2012, the average
yearly temperature has been continually rising.
The average temperature last year of 13.7°C
was the highest since its records began
in 1973.
Rainfall during last year's rainy season
was 660.2mm nationwide,
nearly two times the 356.7mm annual average.
Figure.
Kim Kwang soo is a professor of agriculture
and life sciences at Seoul National University.
Kim said South Korea's climate conditions
were becoming more like subtropical areas, so it is important for farmers
to find the right crop varieties for the climate.
Tropical and subtropical fruit
are usually expensive in South Korea, so shoppers
should welcome the less costly local produce.
My kids love bananas,
so it would be good if we harvest bananas in this country, said Kim Ji eun,
who was purchasing imported bananas in a Seoul supermarket.
I'm Jill Robins.
And. Two American astronauts
could remain at the International Space Station I.s.s.
until February.
If the spacecraft that transported them cannot be fixed.
To safely bring them home, the U.S.
space agency NASA said last week
it had not yet made return plans for astronauts
Butch Wilmore and Sonny Williams.
The two have been aboard the I.s.s.
since June 6th.
The American astronauts were expected
to stay in space for only a week,
but technical issues with the Boeing built
Starliner spacecraft have so
far prevented a return trip.
The trip that carried Wilmore
and Williams was a test flight for Starliner.
That marked the first time the spacecraft
successfully carried astronauts to space.
NASA officials held
a news conference Wednesday to discuss
the ongoing situation with Starliner
and the astronauts at the I.s.s..
They said the agency is still working with Boeing
to find a solution for the spacecraft's technical difficulties.
Investigations have centered
on helium leaks and thruster problems with Starliner,
but if those issues cannot be resolved in the coming weeks,
NASA said it could decide to use
space XS Crew Dragon spacecraft
to bring the astronauts back to Earth.
NASA has been using SpaceX XS Crew Dragon
to regularly carry astronauts and supplies
to the ISS since 2020.
If NASA decides to use Crew Dragon,
it said it would leave two of four seats open
during the spacecraft its next planned launch to the I.s.s.
in late September.
Wilmore and Williams would then make the trip back to Earth with Crew Dragon.
NASA officials told
reporters they had brought in additional experts
to examine Starliner's leak issues and thruster failures.
At the same time, the space agency
is looking more closely at space X
as a backup solution to get the astronauts back home.
The agency's space operations
mission chief Ken Bowersox said NASA's
current thinking is that we could take either path.
He added that during a recent meeting, we heard from a lot of folks
that had concern, and the decision was not clear.
NASA has said a final decision
should be made by mid-August.
Boeing representatives did not take part in the news conference,
but the company issued a brief statement
Wednesday repeating its position
that Starliner could still be fixed
to safely transport the astronauts.
We still believe in Starliner's capability
and its flight rationale, Boeing said.
The Boeing statement said if
NASA did decide to change Starliner's mission,
the company would take the actions necessary
to configure Starliner for an uncrewed return.
Steve Stich is the commercial crew
program manager for NASA.
He said the agency was not seriously considering
launching a separate space flight
to pick up Wilmore and Williams.
Officials said tests run
by Boeing and NASA on Earth
have reproduced Starliner thruster problems.
This has suggested to engineers a possible issue
with the thrusters seals.
But Stich noted it was not clear
what is causing the seal issues.
The thrusters are important for permitting Starliner
to back away from the I.s.s.
during its separation operations.
At the same time, engineers are seeking
to find the cause of helium leaks
in the spacecraft's propulsion system.
The first leak happened before the launch,
but more appeared during flight.
Boeing has faced repeated delays
as it struggles to complete NASA's flight testing process before
it can receive approval to start running
official trips to the I.s.s..
I'm Bryan Lynn.
Bryan Lynn is
here now to talk more about his science report.
Thanks for joining me, Bryan .
Sure.
Ashley, it's good to be here.
This week you reported on plans NASA is considering
for how to bring a pair of astronauts home
from the International Space Station.
Their return has been delayed because of problems
with Boeing's Starliner spacecraft.
Have the astronauts themselves made any statements about their current situation?
Yeah, so there had been a couple of live news conferences
the two astronauts have taken part in during their stay on the I.s.s..
One of those happened just about a month ago.
And it was interesting to me that during this conference,
the astronauts talked about all the things
they were doing to help get things ready for the trip home.
So far, we've heard a lot from NASA and Boeing officials
about the steps they're taking to fix the spacecraft difficulties,
but the astronauts said they are also taking part
in these efforts as much as they can every day.
What sorts of
things have they said they have been doing?
So one of the things astronaut Sonny Williams said they've been doing
is supporting the work of technical teams
seeking to resolve starliner's problems.
That effort has involved many people on the ground,
but the astronauts aboard the station have also been carrying out safety tests,
for example, and coordinating important updates for the spacecraft.
Now, Starliner only carried two people in this test flight,
but is designed to support four astronauts.
So another thing they did was to put two additional astronauts staying at the
ISS into the capsule and performed
some tests with the spacecraft.
The original plan for these two astronauts
was to spend only about a week at this.
What are they saying about being delayed there now
for over two months with no new return date set?
Well, both of the astronauts
have said this delay was not totally unexpected,
and they've emphasized this was only a test flight
which was carried out.
Of course, to learn more about the Starliner spacecraft
and all flight processes.
And the pair also noted that if NASA had found another flight home
for them, perhaps with SpaceX's Crew Dragon rocket, that would have been okay.
But they also said that would not have been the best solution,
because there is so much they feel they can do from the i.s.s.
to support the current troubleshooting efforts on Earth.
And they said so much more is being learned
by them remaining in space.
All right.
Thanks again
for joining me on the podcast, Bryan , and thank you for your science report.
You're very welcome, Ashley.
Thank you.
VOA Learning English
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It is called Let's Learn English with Ana.
The new course aims to teach children American English
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and experiencing fun situations.
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Learning English.
VOA News.com.
Our national parks journey continues
with one of the most popular and beautiful places in America.
Grand Canyon National Park in the state of Arizona.
The Grand Canyon is one of the seven natural wonders of the world,
and one of the largest canyons on Earth.
It stretches for 450km.
Parts of the canyon are more than 30km wide
and one kilometer deep.
Many writers have tried
to describe the wonder of the Grand Canyon.
They use words like mysterious,
overpowering, and strange.
But it is not possible to put human meaning to such a place.
The Grand Canyon truly is beyond words.
Is this your first time at the Grand Canyon? yes.
And what do you think?
Do you have a few words to describe them?
Beautiful.
amazing.
What do you think of the Grand Canyon?
Oh, very huge and very colorful.
Do you have some.
Words to describe what you're seeing?
Amazing. It's so amazing.
When I see it at the first look.
The canyons of America's southwest
are deep, ancient openings in the Earth.
They look as if they formed as the Earth
split apart in reality.
Rivers formed these canyons
40 million years ago.
The Colorado River began cutting through the area
around the present day Grand Canyon.
The river carried dirt and pieces of stone
that slowly ate away at the surrounding rock.
It left a pathway of enormous rock openings.
At the same time, forces deep within
the Earth pushed up the surrounding land.
Rain, snow, ice, wind, and plant roots
rubbed away at the top of this new canyon below.
The river continued to uncover more
and more levels of ancient rock.
Some of the exposed rocks along the Grand Canyon
walls are nearly 2 billion years old.
They are among the oldest rocks on Earth, with many levels of granite,
schist, limestone, and sandstone.
The Grand Canyon measures 2500m
from the canyon floor to its highest point.
Because of its size.
The weather at the top of the canyon is often much different from the bottom.
On some winter days.
For example, you may find cold winds
and snow at the top,
but at the bottom of the canyon
you may find warm winds and flowers.
The Grand Canyon is home to some 2000 plant species.
Some of these species can only be found in the park.
The park is also home to more
than 370 species of birds, 90 kinds of mammals
and 40 kinds of reptiles.
Many of the birds spend their whole lives in the Grand Canyon.
Other species depend on the Grand Canyon
for food and shelter during large migrations.
The Grand Canyon was named a
Globally Important Bird Area in 2014
because of the role it plays in protecting
many species of birds.
Native Americans occupied the Grand Canyon
3000 years ago.
Bones, hair, feathers,
and the remains of plants have been found in deep, dry caves.
High in the rock walls, the Hopi, Paiute,
Navajo, and other Native American tribes
have all been in the area for at least 700 years.
In 1869, American John
Wesley Powell explored the Grand Canyon.
He recorded much of what we know today about the area.
Powell and his group traveled
in four boats along the Colorado River.
He and his group of explorers knew very little
about getting over the vast, rocky waters of the Colorado River.
In many places, boats
could be turned over by giant waves.
Soon after they started their journey, Powell
s group lost some of its food and equipment.
Three members decided to leave the group
as they walked up and out of the Grand Canyon.
They were killed by Native Americans.
The rest of Powell's group
survived the journey, starved and tired.
Powell and his group reached the end of the canyon.
They had traveled by boat down the Colorado
for more than three months.
John Wesley Powells reports and maps from the trip
greatly increased interest in the Grand Canyon,
but visitors did not begin to go there
in large numbers until 1901.
That year, a railway was built
that reached the area.
5 million people
visit the Grand Canyon every year.
The first sight of the canyon can leave
visitors speechless.
Depending on the time of day.
The sun lights up the rock walls in red,
orange and golden colors.
The bright colors are the result
of minerals in the rock.
Their appearance changes endlessly
with the light, the time of year and the weather
at sunset.
The canyon walls display fiery red and gold hues.
Then they take on softer colors of blue,
purple, and green.
Most visitors
walk along paths partway down the canyon.
It takes several hours to walk to the bottom,
and even longer to climb back up.
Some visitors choose to ride
mules to the bottom of the canyon.
Mules are strong, sturdy animals
that look similar to horses.
Visitors can also explore
the Grand Canyon in other ways.
Hundreds of thousands of people
see the canyon by air each year.
They pay a helicopter or airplane pilot
to fly them above and around the canyon.
Thousands of people every year choose
to explore the Grand Canyon by boat from the Colorado River.
These trips last 1 to 3 weeks.
Most people who
come to the Grand Canyon National Park visit
an area known as the South Rim.
That area has shuttle busses
that take visitors to overlooks.
Fewer people see the canyon from the North Rim.
The North Rim is less than 20km
across the canyon from the South Rim.
But visitors must drive
more than 350km by car
from the South Rim to access the North Rim.
Visitors can also see the Grand Canyon
from a huge glass walkway called the skywalk.
The skywalk is on the Hualapai Indian Reservation
in the western part of the canyon.
The Hualapai Indians built it
to increase tourism at the reservation.
It opened in 2007.
The skywalk extends more than
20m from the canyon's rim.
It is suspended.
More than 1200m above the bottom of the canyon,
and is shaped like a giant horseshoe.
Many call the skywalk an engineering wonder,
but others have criticized the skywalk and its development.
They say it reduces the enjoyment
of nature in the Grand Canyon.
For visitors hoping to get a view of the entire Grand
Canyon, they will have to travel well
beyond the state of Arizona.
The only place to see the entire canyon
at once is from outer space.
I'm Ashley Thompson.
And I'm Jonathan Evans.
And that's our program for today.
Join us again tomorrow to keep learning
English through stories from around the world.
I'm Ashley Thompson.
And I'm Mario Ritter, junior.
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Key Vocabulary

Start Practicing
Vocabulary Meanings

glaciers

/ˈɡleɪʃiərz/

B2
  • noun
  • - large mass of ice moving slowly down a valley or slope

shrinking

/ˈʃrɪŋkɪŋ/

B1
  • verb
  • - getting smaller

scientists

/ˈsaɪəntɪsts/

B1
  • noun
  • - people who study and learn about the natural world

discovery

/dɪˈskʌvəri/

B2
  • noun
  • - finding something unexpectedly

conditions

/kənˈdɪʃənz/

B1
  • noun
  • - the state of something

result

/rɪˈzʌlt/

B1
  • noun
  • - something that happens because of something else

samples

/ˈsæmplz/

B1
  • noun
  • - small parts or amounts used to show what the whole is like

experts

/ˈekspɜːrz/

B2
  • noun
  • - people with special skills or knowledge

measured

/ˈmeʒəd/

B1
  • verb
  • - to find the size, amount, or rate of something

concentrations

/ˌkɒnsənˈtreɪʃənz/

C1
  • noun
  • - the amount of something in a particular area

decay

/dɪˈkeɪ/

B2
  • noun
  • - the process of something getting destroyed or rotting

exposed

/ɪkˈspəʊzd/

B1
  • adjective
  • - able to be seen or touched

era

/ˈɪərə/

B2
  • noun
  • - a long period of time in history

savings

/ˈseɪvɪŋz/

B1
  • noun
  • - money that is put aside for the future

interglacial

/ˌɪntəˈɡleɪʃəl/

C1
  • adjective
  • - relating to a warm period between ice ages

tropical

/ˈtrɒpɪkəl/

B1
  • adjective
  • - relating to the area near the equator

climate

/ˈklaɪmət/

B1
  • noun
  • - the usual weather in a place

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