Astronauts train to scale a Mars volcano at an analogue site in France. Lava tubes that crisscross the Martian surface might provide sanctuaries for the first human explorers on the Red Planet. (Photo ...

NASA's Perseverance rover has photographed a peculiar rock formation that looks eerily like a turtle poking its head out from its protective shell. When you purchase through links on our site, we may ...

Mars has lost immense amounts of water over it lifetime, and scientists aren't sure exactly how. New research hints that the planet's violently varying tilt may be a key factor. When you purchase ...