If you mean that the footer doesn't stay fixed to the bottom, try 

.footer_page, .push {
  clear: both;
  color: #fff;
  text-align: center;
  bottom: 30px;
  width:100%;
  position:absolute;
}


so adding .push and clear:both.

CSS Div Footer When Resize The Browser
It makes sense, since gravity tends to push the surface of a body towards it's center. Unless I'm mistaken, everything with mass has it's own gravity, every atom and for instance, our own bodies should also have their own gravity. The question is: how strong is our own gravitational pull? I know it must be extremely weak, but is there actually anything at all that gets attracted to us, like maybe, bacteria or molecules?

And finally (this will sound ridiculous, but I'd really want to get an answer or at least a way of calculating it myself): What size would a human body have to reach in order for it to collapse into a sphere?
