Hum, so this mean that instead to have to wait 18 years to have adult male born in mars, we could decide if we want to accelerate the process and save 10 years (and maybe a few malformations), because is biologically possible to do so. Wow!<p>A small step for testosterone (god bless it), a big step for mars colonization.<p>(On the other hand, astronauts fighting all the time inside a complex life supporting system would be not probably the best idea)