The soda straw formations are another geological curiosity that sounds more like something from a diner menu than a cave ...

Lunar rocks collected by Apollo astronauts more than half a century ago are providing a fresh take on the moon's mysterious ...

A new NASA analysis concludes that it is "reasonable to hypothesize" that living things could have formed the odd organic molecules discovered on Mars.

A 6.5-foot Mars sand ridge called Hazyview reveals how strong, steady winds once shaped the planet’s surface and soil chemistry.