17:13
Somewhere Out There, Planet Nine
Researchers calculate that there may be a large undiscovered ninth planet lurking in the distant reaches of our solar system.
17:14
Deep Space Design: The Search for Future Space Construction Materials
In the future, space habitations could be constructed out of concrete made of Martian sulfur and inflatable materials.
The Week-After Science Friday Quiz! 1/5/16
How much do you know about the early days of the personal computer?
10:32
So You Want to Be an Astronaut?
As NASA begins “astronaut candidate” selection, Administrator Charles Bolden explains what it means to have the “right stuff.”
10:24
Pluto Comes Into Focus
Photos from the New Horizons mission reveal icy plains, craters, and mountains on Pluto.
7:25
Errant Satellites Provide Test Case for General Relativity
A team of physicists have repurposed two satellites launched into the wrong orbit as an experiment to test one aspect of Einstein’s theory of general relativity.
17:24
Did Dark Matter Doom the Dinosaurs?
Physicist Lisa Randall explores the theory that a disc of dark matter could have been responsible for the catastrophic collision that extinguished the dinosaurs.
11:53
The Mysterious Flicker Behind Star KIC 8462852
Astronomers explore theories behind a distant star with a mysterious glow, including swarming comets and alien megastructures.
Cosmic Connections: Dark Matter and the Dinosaurs
An excerpt from “Dark Matter and the Dinosaurs.”