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28:17
Charles Elachi
The story behind the Mars Rovers
19:41
Peter Ward
A theory of Earth's mass extinctions
15:53
Robert Lang
The math and magic of origami
4:01
Peter Diamandis
Stephen Hawking's zero g flight
3:22
Steve Jurvetson
Model rocketry
29:51
Richard Branson
Life at 30,000 feet
17:09
Carolyn Porco
This is Saturn
3:50
David Hoffman
Sputnik mania
17:43
Bill Stone
Inside the world's deepest caves
19:37
Burt Rutan
The real future of space exploration
15:31
Peter Diamandis
Our next giant leap
11:55
Tom Shannon
Anti-gravity sculpture
29:42
Stephen Petranek
10 ways the world could end
8:38
George Dyson
The story of Project Orion
14:48
Mae Jemison
Teach arts and sciences together
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