Mars had right conditions for subsurface life some 3.7 to 4.1 billion years ago (Noachian period), according to new research from Brown University. An artist’s impression of habitable Mars. Image credit: Daein Ballard / CC BY-SA 3.0. “We showed, based on basic physics and chemistry calculations, that the ancient Martian subsurface likely had enough dissolved hydrogen to power a global subsurface biosphere,” said study lead author Jesse Tarnas,...
