Why The Multiverse Isn’t Just Madness
The multiverse—the idea that infinite universes stretch beyond our own—has gained traction among physicists. But others think it’s just a multi-mess.
25:38
The Gesture That Changed Human History
In his new book, physicist Carlo Rovelli takes a journey through modern physics, from Galileo to quantum gravity.
Facts About Asteroids That Rock
Which asteroid is made of metal, and which hides an ocean? The answers lie in our nifty asteroid trading cards.
16:29
Lucy and Psyche Asteroid Missions Explore the Early Universe
NASA’s upcoming asteroid missions will examine a metal world and primitive planetesimals.
46:55
2016 Year in Review
Gravitational waves, CRISPR, and Pokémon Go—a look at the big science stories of 2016.
12:00
Space Trivia, and a Cosmic Trip Planner
Astronomer Dean Regas shares some of his favorite stellar facts, and offers tips for the big skywatching event of 2017: the solar eclipse.
29:02
A True Story of High Drama in Space
In this 1995 segment from the Science Friday archives, Apollo 13 mission commander Jim Lovell tells the story of the flight’s survival after an explosion in space.
17:14
The Amazing Expanding, Accelerating Universe
In this 1999 conversation from the Science Friday archives, astrophysicists Neta Bahcall and Wendy Freedman explain the then-revelation that the universe’s expansion is accelerating, not decelerating.
Breakthrough: Snapshots from Afar
In the second episode of Science Friday and HHMI’s series “Breakthrough: Portraits of Women in Science,” three scientists share stories about India’s first interplanetary mission—a mission to Mars.
The Stars Behind Our Stellar Classification System
Author Dava Sobel explains how a group of women astronomers helped develop the classification system that scientists use to identify stars today.