So-called "recurring slope lineae" are a tantalizing feature on the slopes of Mars, but how do we go about exploring their potential life-giving qualities without contaminating them with our robots?
NASA's Dawn mission has detected tar-like organic compounds on the dwarf planet's surface, bolstering prospects for life on the largest body in the asteroid belt.
After five years, a California company called Planet has more than 100 satellites in orbit, allowing it to begin selling and providing images of the entire Earth every day.
Although there's some fear surrounding the act of sending messages to hypothetical extraterrestrial intelligences, it could be one of the most important things humanity could do — scientifically speaking.
Rocket Lab is one among dozens of companies around the world building rockets to handle an expected boom in demand for small satellite launches.
The ExoMars Trace Gas Orbiter (TGO) is about to fly into Mars' upper atmosphere, using its drag to slow down and refine its orbit.
A never-published work shows that the famed wartime leader thought like a scientist about the potential for life elsewhere in the universe.
Just as NASA scientists were preparing to use Curiosity's "wet chemistry" experiment for the first time, the rover's drill broke, throwing a key test for orgainics on the Red Planet into doubt.