
♪ The autotrophs BEGAN to drool,
Neanderthals developed tools ♪
The Big Bang Theory Season 12, Episode 19

♪ The autotrophs BEGAN to drool,
Neanderthals developed tools ♪
The Big Bang Theory Season 7, Episode 10

♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 20

♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 14

♪ The Earth BEGAN to cool
The Big Bang Theory Season 12, Episode 9