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Is it, though?Has been for, oh, the last 3,000 years or so. From Chinese sailors to Romans to Vikings to Spaniards and beyond…
One of the main points of the book is that the limits to our colonizing space may not be technological know-how. It's that we inhabit bodies and have brains that were optimized through untold millions of years to live on earth. We have a pretty wide habitat range, since we're a fairly flexible species - but it's not unlimited.So there are no other planets like Earth out there?
Many humans tend to do poorly being confined in small spaces with other humans with no opportunity to get away. Some humans do well at it, but many many humans aren't going to be able to do it. Past experiments involving the types of conditions likely to be encountered in long-term space travel and/or colonization, like the Bio-Dome, reveal the need to carefully select participants for their ability to withstand those types of conditions.You know the Navy has screens for people who spend 6 months underwater in nuclear subs, right? Obviously it’s not for everyone.
If we’re going to explore the stars, we’re not going to be able to do it launching from Earth. We’re going to have to have bases in orbit, on the moon, and perhaps other places.
Technology advances. Maybe this guy at NASA figures it out:
space.com - Warp drive possibilities positive energy
