25 September 2016 - Earthlike 1

Venus is the most Earthlike world; it is closest to Earth in size and orbit. Mars is the most Earthlike; its surface conditions are closest. Titan is the most Earthlike; it has rain and seas (of liquid natural gas, but whatever). Never mind that any of these places would kill you before you took your second breath. Now astronomers are seeking Earthlike worlds at other stars, where the mix of elements started out different, and I’m holding my breath. It seems like my best chance to get enough oxygen.