Image: Spelunking astronauts train for teamwork

Astronauts from five space agencies around the world are taking part in ESA's CAVES training course – Cooperative Adventure for Valuing and Exercising human behaviour and performance Skills.

Cave art trove found in Spain 1,000 feet underground

Spanish archaeologists say they have discovered an exceptional set of Paleolithic-era cave drawings that could rank among the best in a country that already boasts some of the world's most important cave art.

Scientists: Underground stone rings made by Neanderthals

Two mysterious stone rings found deep inside a French cave were probably built by Neanderthals about 176,500 years ago, proving that the ancient cousins of humans were capable of more complex behavior than previously thought, ...

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