It's an observational rebuttal
of the Lambda-CDM model of the UNIVERSE.
The Big Bang Theory Season 6, Episode 4
# Our whole UNIVERSE
was in a hot, dense state #
The Big Bang Theory Season 11, Episode 15
Is our UNIVERSE the only UNIVERSE?
The Big Bang Theory Season 4, Episode 20
Oh, I don't know. Maybe because
the origin of the UNIVERSE
The Big Bang Theory Season 7, Episode 20
♪ Our whole UNIVERSE
was in a hot, dense state ♪
The Big Bang Theory Season 5, Episode 6