The ripples suggest that the lake was free of ice at one point.

We often forget how wonderful it is that life exists, and what a special and unique phenomenon it is. As far as we know, ours ...

"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...

Mars is often seen as a barren, rust-colored wasteland, but NASA’s Curiosity rover has just revealed a surprising burst of ...

Martian clouds are almost always made of dry ice, or frozen carbon dioxide. 95% of the planet's atmosphere is CO2.