The pardon was one of the defining presidential moments for Jimmy Carter, who died Dec. 29 at the age of 100. The move was pilloried by members of the military and conservative politicians.
NPR's Leila Fadel talks to Marlon Sorge of The Aerospace Corporation, which researches space debris issues including who is responsible when man-made objects fall from space.
A rocket is scheduled to launch next year that will take along a robotic probe to orbit the moon. The probe is expected to provide details of how much water there is on the moon and where it is.
Watching a huge ball descend down a pole in Times Square has been a beloved New Year's Eve tradition for over a century. Here's how the spectacle started and what's changed over the years.