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50:11
Watch a rare interview with the late Apple visionary, conducted in 1990.
5:15
Take a behind-the-scenes look at this animated scene from "The Fabric of the Cosmos."
4:06
Learn how to find signs of extraterrestrial life in our galaxy without leaving home.
2:21
The need for alternative energy sources is more pressing than ever.
3:21
See how salamanders in California are evolving, just as Darwin might have predicted.
2:37
Senior Executive Producer Paula Apsell describes the decision to make "Judgment Day."
2:33
The New York Times technology columnist describes the best and strangest gadgets he’s...
1:54
Architect and designer Michael Arad takes us on a tour of his 9/11 Memorial mock-up.
2:30
Thirsty for understanding? See how well people on the street can explain spacetime.
4:46
Learn how Peter Higgs' ideas about matter transformed our understanding of space.
