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How parrots swing like monkeys
1:36
Like monkeys, parrots are also able to travel by suspending their body weight.
Astronaut Walter Cunningham on the Historic Apollo 7 Mission
32:26
He discussed the first crewed Apollo mission, Apollo 7, with NOVA in 1998.
What really led to the collapse of Easter Island?
2:58
What happened to the Rapa Nui civilization is shrouded in mystery.
How Engineers Soundproof a New Underground Train Track
2:57
Part of the new London track is directly below an iconic performing arts center.
5 things to know about the Eiffel Tower
1:40
Did you know that the Eiffel Tower was once red?
Why is the Eiffel Tower Shaped Like That?
1:58
The Eiffel Tower was a completely novel design at the time it was built.
These Trains Take Over for Their Drivers to Cut Travel Time
2:54
Can trains save their drivers time by changing direction on their own?
The force that makes up more than half of the universe
1:40
Dark Energy was first discovered in 1998, and scientists don’t fully understand it.
How to Calculate Time With an Islamic Astrolabe
2:38
It is one of Islamic science’s most important and complex astronomical instruments.
Rare stellar explosion will ignite a "new star"
1:17
Sometime between now and September a star will explode.
When Earth Was Bombarded by Asteroids
3:41
What studying the surface of the Moon revealed about Earth’s apocalyptic youth.
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