While scouring a 50-million-year-old crater on Mars, the Curiosity rover stumbled upon a polygon-shaped pattern that sort of ...

NASA's Curiosity rover snapped a series of peculiar polygons that look suspiciously like giant fossilized reptile scales.

New images from the Mars Express spacecraft show ancient volcanic ash spreading across the Red Planet.

Do little green men exist? Was 'Men In Black' a documentary? Prediction markets price the odds of the U.S. confirming aliens before 2027 - here’s why traders overwhelmingly expect a government ...