The car-sized rover Curiosity had a clean landing on Mars five months ago. But planetary missions didn’t always run so smoothly at NASA’s Jet Propulsion Laboratory. Mariner 3, a probe sent to do a ...

One of my favorite birthday gifts was one I wasn’t sure I wanted. Years ago, a friend had been raving about a show called “Veronica Mars.” It starred a petite blonde chick I’d never heard of named ...

As a contributor to the documentary Blue Planet Red, I would like to address the criticism in Simon Ings’s review that xenon-129’s presence in the Martian atmosphere implies ancient nuclear conflict ...