![♪ The Earth began to cool
♪ The Earth began to cool](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 1
![♪ The Earth began to cool
♪ The Earth began to cool](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
♪ The Earth BEGAN to cool
The Big Bang Theory Season 12, Episode 19
![♪ The autotrophs began to drool,
Neanderthals developed tools ♪
♪ The autotrophs began to drool,
Neanderthals developed tools ♪](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
♪ The autotrophs BEGAN to drool,
Neanderthals developed tools ♪
The Big Bang Theory Season 7, Episode 20
![♪ The autotrophs began to drool,
Neanderthals developed tools ♪
♪ The autotrophs began to drool,
Neanderthals developed tools ♪](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
♪ The autotrophs BEGAN to drool,
Neanderthals developed tools ♪
The Big Bang Theory Season 5, Episode 15
![♪ The Earth began to cool
♪ The Earth began to cool](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 15