Hi all, First of all nice forum. Secondly, I'm new here and I wasn't sure where to start this thread, but seeing that it's mostly about gravity, I guess this section is suitable. I apologize if it's not. Anyway, I have this question that's been screwing up my mind. Imagine that there were aliens that lived on a planet very much like ours. Only difference is that their planet is much bigger than ours and has much more gravity. Let's say that their gravity is 10 times that of earth. So their physical strength will obviously be much greater since their bodies have to resist all that gravity. Now let's say one of them comes here... Since a human acts 'weird' (floats a little etc...) when he's on the moon, will the alien act the same way on our planet, since his homeplanet has much stronger gravity? According to physics that's what will happen I suppose. But that doesn't make any sense because that would mean that physical strength will effect the gravity that's pulling you, right? So in other words, if (hypothetically speaking) a human reaches the same strength of that alien, he will start to jump more, float a little on our planet as well!? Because that's sounds unbelievable to me. To continue with this little argument, gravity pulls every bit of matter in your body, so it's like a force holding you. When you put a human in a place where gravity is very little or non existent, that force is gone, so how come he isn't able to move faster?? how come we don't move faster on the moon? To make it even more clear, that alien we were talking about earlier, wouldn't he be able to move 10 times faster on our planet since the gravity is 10 times less than the gravity of his planet? Looking forward to your answers. Cheers.