The Oxygen Bottleneck: Astronomers Find Huge New Problem For Alien Civilizations
A potential problem for any intelligent aliens that could be out there that may forestall them from developing engineering science has been highlighted by a late paper : the atomic number 8 bottleneck . Free atmospherical oxygen is , of grade , one of the key signal of possible life to look out for . The only satellite where we know there is levelheaded life ( well , kinda ) has free atmospheric O in abundance ....