17:26
A Sci-Fi Writer Keeps His Eye on ‘Spaceship Earth’
In his new novel, “Aurora,” sci-fi writer Kim Stanley Robinson puts the dream of interstellar colonization under the microscope.
Well, Hello, Pluto!
Our most up-close-and-personal shot of the (dwarf) planet yet.
17:43
New Horizons Prepares for Pluto Close-Up
The New Horizons probe is about to capture its prize: a close-up of Pluto.
5:14
Astronomers Play Hide-and-Seek with Supermassive Black Holes
Researchers estimate that there are millions of supermassive black holes hidden in the universe.
A Peek Inside the Mind of Elon Musk
An excerpt from the new biography “Elon Musk.”
12:00
A Cometary Awakening, a Vaccine Mystery, and Brand New Bacteria
Tariq Malik of Space.com talks about Philae’s unexpected awakening, and Arielle Duhaime-Ross helps decipher a mystery that has plagued scientists for 50 years.
7:14
Could Mars Have a Cold, Icy Past?
The ancient climate of Mars may have been cold and icy, according to researchers.
A Human Sundial
Why does the length and direction of our shadow change throughout the day? It all comes back to rotation and position of our planet relative to the sun.
24:16
One Year Aboard The Space Station
Astronaut Scott Kelly—aboard the International Space Station—and his Earth-bound twin brother, Mark, talk about the effects of living in space for one year.