15:59
How Cosmic Collisions Have Shaped Our Solar System
Some of our solar system’s landmarks can trace their origins to massive impacts.
9:34
Studying Rocks Found on Earth for Clues About Space
We’ll take a tour of the Center for Meteorite Studies, and learn how meteorites can teach us about the history of the solar system.
Tying Water in a Knot
These fluid knots are like smoke rings–but made of water and shaped like a pretzel instead of a donut.
4:27
Behold the Mighty Water Bear
Water bears, a.k.a. tardigrades, can withstand boiling, freezing, and the vacuum of space.
5:38
When the Earth Swallows
Sinkholes have gobbled up swimming pools, buses, and homes. But what causes them? And is there any way to predict where they’ll strike?
24:11
Al Gore Envisions ‘The Future’
The climate guru’s latest book tackles everything from American politics to nanotech, and of course, climate change.
Meet the Judge of Our Winter Nature Photo Contest
Photographer Clay Bolt helps choose finalists out of hundreds of submissions.
12:04
How Wood Smoke Is Dirtying Alaska’s Air
Cathy Cahill, of the University of Alaska Fairbanks, discusses air quality in the Last Frontier.
23:38
The SciFri Book Club Visits ‘Gorillas in the Mist’
Dian Fossey’s classic account of her fieldwork is on the reading list this month.
Open Invitation to Lamar Smith, House Science Committee Chairman
Science Friday invites Chairman Lamar Smith to discuss technology that will track objects such as asteroids that threaten Earth.