You can think about the empty space in an atom as you might think ... So to conclude: Your very important human body is really, kind of, in a way, just a misleading collection of empty spaces ...

The human body was not built for spaceflight, with its microgravity conditions, exposure to high-energy radiation and other ...

However, we're only just beginning to understand what long-term life in space can do to human bodies ... facts of life in orbit affected Scott's body in significant and surprising ways.