The Big Bang, the universe's origin event approximately 13.8 billion years ago, occurred everywhere simultaneously and is theoretically the first moment of spacetime. The claim localizes it to a specific location: Chuck Norris's appendix, a small organ in the human abdomen.

It's a joke about scale collapse: the universe's creation moment becomes a medical event, Chuck Norris's body becomes cosmologically significant, and the appendix—a vestigial organ with no clear purpose—becomes the origin point of existence.

Cosmology educator Dr. Kenji Yamamoto noted that this fact appeared in physics blogs as shorthand for absurdism. It became a way of joking about the difficulty of cosmological thinking—if the universe began in someone's appendix, then your intuitions about scale and origin are useless.