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Why Eagles are Overdubbed In Movies
Why Eagles are Overdubbed In Movies
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0:00
Hey, I'm Miranda Cosgrove and this is
0:02
part two of my favorite episodes of
0:04
[music] Science Minute with Minute
0:06
Earth, an illustrated segment from my
0:08
show Mission Unstoppable. Wait, let me
0:11
animate myself.
0:16
This is a bald eagle, and it's a bit of
0:18
a fraud. No, not like that. It's totally
0:21
a real bird, but when it's on TV
0:24
[music] it lip syncs. Here's what I
0:26
mean., Whenever, you, see, one, of these, guys
0:28
soaring majestically across the screen
0:30
[music]
0:31
it's usually accompanied by this fierce
0:33
scream.
0:35
But that's no eagle. That sound is
0:37
[music] actually the work of a voice
0:39
actor known as the redtailed hawk. Why
0:42
is that? Well, [music] when we think of
0:44
bald eagles, we think of strength and
0:47
courage and determination. You know
0:49
America. But in reality, the eagle's
0:51
[music] call is less majestic and more
0:54
well, cackly. Here, listen for yourself.
0:59
Old Hollywood movie producers [music]
1:01
realized that in order to preserve the
1:03
bird's symbolic value, they needed to
1:05
give its voice a makeover. Thus, the
1:08
bird [music]
1:08
and switch. [screaming]
1:15
You've heard of ant farms, but did you
1:17
know that ants [music] farm? It's true.
1:20
In the forests of South America, columns
1:23
of [music] leaf cutter ants scurry along
1:24
tree branches, collecting, well, leaves.
1:27
But they don't actually eat the leaves.
1:29
Instead, they do something much weirder.
1:31
[music] They carry the foliage
1:33
underground to their home where they
1:34
feed it to a fungus. This fungus, which
1:37
only exists in leaf cutter ant dens, is
1:39
basically [music] an ant crop. Just like
1:41
humans grow corn, and just like human
1:43
farmers love to munch on corn, ant
1:46
farmers love [music] to snack on their
1:47
shrooms. Ants aren't the only fungal
1:49
farmers in the animal kingdom. Termites
1:51
ambrosia beetles, [music] and even
1:53
snails do it, too. Meanwhile, spotted
1:56
jellies farm algae, and yeti crabs use
1:58
their hairy arms to grow colonies of
2:00
tasty bacteria. Most impressively, the
2:02
long fin damsel fish [music] herd swarms
2:05
of seemingly domesticated shrimp like an
2:07
underwater cowboy. It turns out that
2:10
animal farms [music] are far more common
2:12
than we thought.
2:16
>> [music]
2:16
>> People, come, from, all, around, the, world, to
2:19
admire this giant stone structure in
2:21
[music] the English countryside, now
2:23
known as Stonehenge, which was built
2:26
thousands of years ago by some
2:27
particularly industrious folks who
2:29
[music] dragged huge boulders for miles
2:32
in order to make it. And there have been
2:34
a lot of theories about why they built
2:36
it. Like maybe it was a temple for
2:38
important religious ceremonies or a
2:40
[music] meeting place for rival
2:41
chieftdoms or a cemetery for VIPs.
2:45
[music] One enduring theory suggests
2:47
that Stonehenge was basically used as a
2:49
giant calendar. [music]
2:50
For instance, if you're standing in the
2:52
center of the rings on the first day of
2:54
summer, the sun seems to rise behind a
2:56
particular [music] stone called the heel
2:58
stone. Meaning that people probably use
3:00
Stonehenge [music] to track the passing
3:02
of the seasons. But that seems like a
3:05
lot of work to just make [music] the
3:06
world's biggest sund dial. Perhaps the
3:08
true purpose of Stonehenge has been lost
3:11
to [music] the thing we think it
3:13
tracked. Time.
3:18
Hey, up here. [music] I'm on top of one
3:20
of the tallest skyscrapers on the
3:22
planet. It's a good thing I'm not afraid
3:24
of heights. When buildings [music] get
3:26
this high, their biggest problem is the
3:28
wind. Early skyscrapers would sway
3:31
nauseatingly whenever it was gusty
3:32
[music] outside. That's because when
3:34
lots of air gets pushed up against a
3:36
building, it can create powerful
3:38
whirlwinds that [music] spin off of the
3:39
corners and tug the structure from side
3:41
to side. So, modern skyscrapers like
3:44
this one have a secret weapon called a
3:46
damper, [music]
3:47
which is basically a giant weight
3:48
connected to a wind monitor. When the
3:50
wind really starts blowing, the weight
3:52
shifts to counteract the force of the
3:54
wind and keep the building from swaying.
3:56
Many of the tallest buildings in the
3:58
world have a damper. But [music] the
4:00
tallest building, the Burj Khalifa, at
4:02
over a half mile tall, was instead
4:04
designed to be thin and aerodynamic.
4:06
Basically, it slices through the wind
4:08
like a wing, so the air can't pile up in
4:10
the first place. Speaking of wings, it's
4:13
time for me to fly.
4:18
Spiders, they're on [music] the ground
4:20
in the sky. Oh yeah, they fly lurking in
4:23
your bedroom closet. And guess [music]
4:25
what? They're also all over your face.
4:28
Yep, these teeny tiny arachnids are
4:31
called [music] demodeex and they're
4:33
actually mites that live inside our
4:35
pores. This news may be sending a shiver
4:38
down your spine, but let me assure you
4:40
everybody has these on their face
4:41
[music] and it's completely normal.
4:43
Democks are not visible to the human
4:45
eye. They're.3 mm long. [music] You'd
4:48
need to line up five of them to fit on a
4:50
pin head. And let's be honest, you still
4:52
couldn't see them. They spend their days
4:54
inside our [music] pores eating our
4:56
sebum and come out at night to mate and
4:58
lay their eggs. Scientists say there's
5:00
no need to be concerned. [music]
5:01
And we most likely have a symbiotic
5:03
relationship with these little bugs
5:05
much like bacteria in our gut. If you
5:07
want to view your own demoex, just
5:09
[music] find someone with a high-powered
5:11
microscope. Scrape off some of your
5:13
sebum, put it on a microscope slide, and
5:15
say hello to your face spiders.
5:20
Up in [music] the Arctic Circle, buried
5:22
in 400 ft of perafrost, lies a vault. A
5:26
very special vault. It's not filled with
5:29
money or gold or diamonds. [music]
5:31
This vault holds the world's largest
5:34
collection of seeds. [music] The
5:37
Spalbard global seed vault is home to
5:39
almost 1 million seeds from nearly every
5:42
country in the world. Scientists take
5:44
great [music] care in protecting these
5:45
seeds as they protect the health of our
5:48
planet. Think about it. If a disaster
5:50
wipes out a crop like for example
5:52
strawberries, [music] the bank will be
5:54
able to provide the seeds to replant
5:56
strawberry fields. Because imagine a
5:58
world without strawberry [music] shakes.
6:00
That's not a world I care to see. So not
6:02
only is this an insurance policy for our
6:05
food sources, the [music] seed vault
6:07
also maintains the genetic diversity of
6:09
the crops on our planet. The vault's
6:11
environment was built to keep the seeds
6:13
[music] safe for thousands of years. So
6:15
your grandchildren's grandchildren's
6:17
grandchildren's grandchildren should all
6:19
be able to enjoy that same delicious
6:21
strawberry [music] shake that we know
6:22
and love.
6:27
Oh no, you've cut yourself. That's all
6:29
right, though, because our skin has the
6:31
[music] ability to heal. It's pretty
6:33
complicated, though. The first stage is
6:36
hemostasis, where the wound clots to
6:38
stop bleeding. Next is the inflammatory
6:40
stage, where [music] healing and repair
6:42
cells move in. Then to the proliferative
6:45
stage where new tissue is built and
6:47
[music] finally maturation when your
6:49
skin is remodeled. But I have something
6:52
to tell you that might shock you. The
6:54
skin that grows back is not the same
6:56
quality as your original skin. [music]
6:58
It's actually only 80% as strong as your
7:00
previous unwounded skin. So friends, be
7:03
careful out there. [music]
7:09
This is a map of the Earth's time zones
7:11
and it mostly makes sense. Sure, there
7:14
are a few weird jets and jags, but if we
7:16
roll the map up into a cylinder and
7:18
slowly rotate it next to a [music] light
7:19
source, like the Earth rotates near the
7:21
sun, you can see that when Tokyo is
7:23
getting bathed in light, New York is in
7:25
the dark. So, [music] it makes sense
7:26
that they should have very different
7:28
time zones. But the Earth is not a
7:30
hollow cylinder. It's a slightly
7:32
squashed sphere. [music] and at its
7:33
poles, the Eastern time zone and Japan
7:36
standard time zone, and all the other
7:38
time zones smash into [music] one
7:39
another. So, there's never any agreed
7:41
upon time at those two spots. Thanks to
7:43
their locations, the poles only get one
7:45
yearly sunrise and sunset anyway, so
7:48
there's not necessarily an obvious time
7:49
zone choice. Scientists [music] at the
7:51
South Pole Research Station have chosen
7:53
a time zone based on convenience.
7:55
[music] They use New Zealand standard
7:57
time cuz that's where all their supplies
7:58
come from. And, well, there's mostly
8:01
just ice [music] at the North Pole. and
8:02
the only resident there keeps insisting
8:04
there's no time like the present.
8:09
If you like this, there's a ton more to
8:12
see on the Mission Unstoppable YouTube
8:13
channel. Or if you're in the US, come
8:16
watch the new season on Saturday
8:18
mornings on CBS.
Why Eagles are Overdubbed In Movies - Video học tiếng Anh
