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The Big Bang Theory’s theme song was written to encapsulate the entire history of the universe.

  • The iconic theme song for The Big Bang Theory perfectly captures the show’s premise about science and the origins of the universe
  • It was written and recorded specifically for the show by the band Barenaked Ladies
  • The song’s lyrics outline the entire history of the universe from the Big Bang to the present day

The instantly recognizable opening lyrics “Our whole universe was in a hot, dense state…” signals the start of another episode of the hugely popular CBS sitcom The Big Bang Theory. This iconic theme perfectly encapsulates the show’s core premise revolving around a group of scientists and their geeky love of all things science and the origins of the universe.

The Big Bang Theory Theme Song Lyrics Explain Universe’s Entire History

Sheldon Cooper
Sheldon Cooper in The Big Bang Theory

The catchy, upbeat song was created and recorded by the Canadian rock band Barenaked Ladies specifically for The Big Bang Theory. The lyrics ingeniously outline the entire history of the universe in just a few lines, starting with the hot, dense state during the Big Bang, followed by the cooling of the universe over billions of years to allow for the formation of the first atoms, stars, galaxies, and ultimately life on Earth.

As guitarist Ed Robertson explained, “Chuck Lorre (co-creator) is a great musician too, and they asked us to try and describe the entire evolution of the universe in a minute and a half. We tried to squeeze it all in there – the Big Bang, atoms, stars, life on Earth.” The full-length theme clocks in at around 1 minute 20 seconds.

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A Fun, Catchy Song That Became Part of the Show

leonard in big bang theory
Leonard in The Big Bang Theory

While Robertson and bandmate Tyler Stewart never expected their theme song to become such an iconic part of the show’s identity, they feel honored to be closely tied to the wildly successful sitcom. As Stewart said, “The entire cast and crew has been amazing to us. We’ve visited the set, played cast parties, they’ve made us feel like part of the Big Bang Theory family.”

The theme song was initially released in 2007 to coincide with the show’s debut. A full album version appeared on the Barenaked Ladies’ 2011 greatest hits album. The song perfectly captured the show’s mixture of intelligence, nerdiness, and humor that made it such a global hit over its 12-season run from 2007-2019.

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The Big Bang Theory ran for 12 seasons from 2007 to 2019 on CBS. It is currently streaming on HBO Max.

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