[stonemetal]

If gravity were lower we would have evolved differently, walking would have adapted too. On the other hand babies probably wouldn't be able to walk either. Being mobile, defenseless, and not having "runaway!" as the default defense mechanism (like horses) is an evolutionary dead end.

[rowanG077]

Sure we might have evolved differently. But that doesn't mean that the human body doesn't work better at sustained 0.8G or 1.2G or whatever.