In message , "Nog"
wrote:

Astronauts have lost as much as 60% of muscle and bone mass by extended
stays in space even with exercise. So what would happen if you just let the
body totally adjust to space for several years?

Extensive loss of muscle and bone mass, with expanded braincase... add
enlarged eyes (adaptation to starlight as principle light-source) and
it sounds like the "greys" to me.

--
R.G. "Stumpy" Marsh.
Timaru, New Zealand.