User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4482591-20111019043509/@comment-1011548-20111019074035

I don't see why, any creature on a planet is going to have evolved bones as strong as it needs, regardless of gravity levels.

You're probably thinking of astronauts that loose serious amounts of bone and muscle when they go into space; I'm not quite sure of the science behind it, but I'm pretty confident it's caused by going from a high-gravity environment to a much, much lower one. Creatures that have spent the past million years on a planet aren't going to know any better.