Fascinating. Makes me wonder: if the same thing happened to earth (core solidifies, loss of magnetosphere, atmosphere then water), would alien scientists be any more able to detect signs of past life on Earth than we are on Mars?
Fascinating. Makes me wonder: if the same thing happened to earth (core solidifies, loss of magnetosphere, atmosphere then water), would alien scientists be any more able to detect signs of past life on Earth than we are on Mars?