Mars may not have always been the dry and dusty world we imagine. A staggering network of ancient riverbeds, spanning over 15 ...

Might sinuous ridges carved out across the ancient highlands of Mars hold the secret to a vanished age of rivers and rain on the Red Planet? Over 15,000 kilometers of such fluvial sinuous ridges, or ...

Dark “slope streaks,” likely resulting from dust avalanches, stretch across an area of Mars called Acheron Fossae in this ...

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.