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 ...

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 ...

"When we see features like this in sediment on Earth, these minerals are often the byproduct of microbial metabolisms that are consuming organic matter." When you purchase through links on our site, ...