Are astronauts evolving?
I was watching the program Bones last night that dealt with the murder of an astronaut. They discovered he must be an astronaut because of the amount of bone loss. That got me thinking so I searched the web and found this to be a true side effect of space travel. Its so severe and quick that the average space station crew member loses 11% of their bone mass during 1 mission. Considering that the only cause of their bone mass loss is lack of gravity, could this be a sign that their bodies are trying to adjust to this lack of gravity, and such, evolving them. Bones are not really neccessary for a life form that doesn't have to deal with as much gravity, or any at all. A quick look at ocean life shows that. Many oceanic creatures have little or no bones. It makes me wonder, if people lived in a non gravity state for generations, how differently might they look?