Questions that have baffled scientists in this context are: why are humans capable of volitionally regulating their breathing

To dive of course!

Another argument in favor or my favorite funny theory (cant wait till the show 'Ancient Alien' finaly manage to use that theory) about human being aquatic apes:

paper

Edit: Seems theadvancedapes Blog is dead. we have to rely to the boring cold wiki explanation about aquatic apes theory