Things we don't know

"It is possible, for example, that there are many extinct human populations that scientists have yet to discover."

A big OMFG reeeally? Also, there may be things in the ocean we don't know about. And in space. And in the jungles....

That's almost as big a "Well, Duh!" as 'Obama's "Become The Very Danger The Constitution Was Designed To Avoid'