>atmosphere you could breath There are peoples like the Sherpas who live in high places where others can't breathe easily. Apparently their ancestors genetical

>atmosphere you could breath There are peoples like the Sherpas who live in high places where others can't breathe easily. Apparently their ancestors genetically adapted to these habitats [0]. >H2O to drink There are peoples like the Bedouin whose whole way of living is based on dealing with the scarcity of water in the desert. >enjoy 1G gravity Well, you got me here. There are apparently slight differences on Earth, ranging from ~9.76 to ~9.83 m/s^2, but yes, other planets would be much different. Anyway, I'm not saying it won't be very difficult for people to adapt, but I just don't see a good reason to say that extraterrestrial life won't ever be commonplace. [0] https://en.wikipedia.org/wiki/High-altitude_adaptation_in_humans https://en.wikipedia.org/wiki/High-altitude_adaptation_in_hu...