I largely agree with him on space. I will say, though, that I’m not as big a Star Trek fan as he is, and particularly with regard to the cheese-eating surrender monkey Picard.
[Update a few minutes later]
OK, having just skimmed the whole (long) thing, it’s more about Amazon than space, so be forewarned.
Humans may possess some ability to regrow it. Doesn’t look like it will help that much for knees and hips, though. But you never know what they’ll find next. Fortunately, I’ve never had any joint problems, yet.