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Why? People have successfully adapted to all kinds of unexpected habitats here on Earth. Isn't your argument the same as someone from 70,000 years ago saying "

• every 6y ago
  No, because wherever you went 70k years ago there would be an atmosphere you could breath, H2O to drink and things you could eat. And wherever you landed you would still be shielded from solar radiation and enjoy 1G gravity...
  • falcor84 6y ago
    >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...