Why Artemis 2 moon launch with astronauts is different from Artemis 1

How and why the Pentagon is laying the groundwork for an economy on the Moon

Astronauts just 3D-printed knee cartilage in space for the 1st time and it's as weird as it sounds

A device on NASA's Perseverance rover generated enough oxygen on Mars for a small dog to breathe for 10 hours. Astronauts could be next.