♪ The autotrophs BEGAN to drool,
Neanderthals developed tools ♪
The Big Bang Theory Season 12, Episode 4
♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 14
# The autotrophs BEGAN to drool,
Neanderthals developed tools #
The Big Bang Theory Season 11, Episode 9
♪ The autotrophs BEGAN to drool,
Neanderthals developed tools ♪
The Big Bang Theory Season 7, Episode 17
♪ The Earth BEGAN to cool ♪
The Big Bang Theory Season 5, Episode 18