The same thing that happened
to Homo erectus.
The Big Bang Theory Season 4, Episode 24
...Homo habilis would've figured out
to kill the guy with the runny nose.
The Big Bang Theory Season 1, Episode 11
I'm the new Homo in town.
The Big Bang Theory Season 4, Episode 24
...I thought that Homo habilis line
really put him in his place.
The Big Bang Theory Season 1, Episode 6
...how does the biologically superior
Homo novus get to work...
The Big Bang Theory Season 2, Episode 5