NASA Didn't Find Life on Mars—But It Did Find Something Very Cool

If we ever get proof of past life on Mars, it’ll come in the form of biosignatures, fingerprints that could only have been left by living organisms. We’re a long way from finding that smoking gun evidence, but an analysis of silica minerals discovered by NASA’s Spirit rover pushes us one step closer. Because of their…

Rare Shot of Venus Crossing the Sun May Help Us Find Alien Life

The image you’re looking at is a rare and beautiful event. Every 115 years, Venus crosses our Sun in Earth’s line of sight—twice. And when the most recent crossing took place, scientists used the event to take a peek at Venus’s atmosphere, refining tools that’ll one day help astronomers search distant worlds for signs…