During an August 20 event at NASA headquarters, called Ancient Earth, Alien Earths, a panel of scientists from NASA and other organizations discussed how vastly different and inhospitable we all would find ancient Earth, if we could go back in time. Despite the conditions, though, it was an ...

Deep in underwater caverns in the Bahamas lie clues to potential life in the far reaches of space. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About One Strange Rock From award-winning filmmaker Darren Aronofsky comes a mind-bending, thrilling journey that explores the fragility and wonder of ...

Comprendre pourquoi la Terre est habitable : composition de son atmosphère, température, pression atmosphérique et champ magnétique. source