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.
16:43
The Female Astronomers Who Captured the Stars
At the beginning of the 20th century, a team of female astronomers at the Harvard College Observatory worked to classify the stars.
17:22
Views From Aloft: The Art of Space Photography
Astronaut Don Pettit has taken hundreds of thousands of photos from the International Space Station.
Space, Seen Through A Window
Astronaut Don Pettit has taken thousands of mesmerizing images during his three missions to the International Space Station.
7:19
Cassini’s Final Year, And Juno’s First
One mission is winding down. Another has just begun. A look at what’s next for each.
6:23
Pluto Rolls Over (the Dwarf Planet, Not the Dog)
In this week’s news roundup, science editor Sophie Bushwick talks about how a massive ice-filled basin may have caused the dwarf planet to tip, and other science stories in the news.
20:25
Science Goes To The Movies: ‘Arrival’
How would real scientists achieve mutual understanding with an alien race?
Earth’s Next Frontier: The Anthropocene
Scientists say the earth has entered a new geological epoch: The Anthropocene. Author David Biello on what humans will have to do to make the planet endure.