34:21
Could There Be a Crisis in Physics?
Physicist Lawrence Krauss and Nobel Laureates Frank Wilczek and Brian Schmidt discuss current cosmic challenges.
10 Questions for Jill Tarter, Astronomer
The long-time SETI astronomer discusses the search for extraterrestrial intelligence and helping inspire a Carl Sagan novel.
16:50
Is the Universe Built on Math?
In “The Mathematical Universe,” physicist Max Tegmark argues that the universe is completely mathematical.
Why We Should Think Big
An MIT physics professor discusses how mathematics is integrated into every part of our universe.
Star-Crossed Galaxies
Collisions between two spiral galaxies can be spectacular affairs, filled with romance.
30:00
Carl Sagan: ‘Science Is a Way of Thinking’
In this 1996 interview, Carl Sagan talks about pseudoscience, UFOs, and the origins of the universe.
Where Do the Geminids Come From? (Hint: It’s Not a Comet)
Evidence suggests that these fireballs don’t come from a comet, but an asteroid with a tail.
12:03
China Shoots ‘Jade Rabbit’ Rover to the Moon
BBC science editor David Shukman talks about the motivations behind China’s moonshot.