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Do Dogs Love Us or do They Just Want Treats?
3:59
Do Dogs Love Us or do They Just Want Treats?
It's time to learn the truth once and for all.
Are Cats As Easy to Train as Dogs?
2:19
Are Cats As Easy to Train as Dogs?
Tips on how to train your cat.
An Interview with Sally Ride
15:46
An Interview with Sally Ride
Watch an uncut interview with the late astronaut, conducted at NASA in 1984.
Hunting Planets
4:40
Hunting Planets
NASA’s Kepler mission lets us search for planets orbiting stars outside our solar system.
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3:59
The Amazing Atomic Clock
What are atomic clocks? And why do we need them?
Brian Greene Previews NOVA's "The Fabric of the Cosmos"
2:10
Brian Greene Previews NOVA's "The Fabric of the Cosmos"
Physicist Brian Greene discusses his return to NOVA with "The Fabric of the Cosmos."
Black Hole Hunter: Priyamvda Natarajan
3:55
Black Hole Hunter: Priyamvda Natarajan
Theoretical astrophysicist Priya Natarajan maps the cosmos.
Capturing "Earthrise" from Apollo 8
1:45
Capturing "Earthrise" from Apollo 8
Many consider “Earthrise,” to be one of the most important photos of the 20th century.
How NASA’s Apollo 8 Left Earth’s Orbit
2:24
How NASA’s Apollo 8 Left Earth’s Orbit
Apollo 8 was the first in the world to head to the moon using trans-lunar injection.
Profile: Priya Natarajan
5:38
Profile: Priya Natarajan
Astrophysicist Priya Natarajan has loved atlases and maps since she was a little girl.
Inside Look: "The Planets"
1:30
Inside Look: "The Planets"
PBS journeys through the solar system to explore NOVA’s “The Planets.”
What is Solar Geoengineering and Why is it Controversial?
4:16
What is Solar Geoengineering and Why is it Controversial?
Solar geoengineering is like drawing a curtain over the face of the Earth.
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