#455 – Adam Frank: Alien Civilizations and the Search for Extraterrestrial Life

5286.241 - 5310.677 Adam Frank

oxygen right in our on earth at least we know that oxygen is only in the atmosphere because life put it there if life went away the oxygen and particularly oxygen and methane that pair they would disappear you know very quickly they'd react away they'd all be gone so if you find a planet with oxygen and methane that's a good bet that there's a biosphere there Okay, what about technospheres?