The Big Bang Theory Season 1, Episode 11

...Homo habilis would've figured out to kill the guy with the runny nose.

The Big Bang Theory Season 1, Episode 6

A Homo habilis discovering his opposable thumbs says, "What?"

The Big Bang Theory Season 1, Episode 6

...I thought that Homo habilis line really put him in his place.

The Big Bang Theory Season 2, Episode 5

You know, a Homo novus, if you will.

The Big Bang Theory Season 2, Episode 5

...how does the biologically superior Homo novus get to work...