Why Anything Exists at All: Matter vs Antimatter | Neil deGrasse Tyson

Añadido: 2026-05-05

[00:00:00]If you take matter and antimatter and put them together, they annihilate.

[00:00:03]Photon turns into matter, it's a matter, antimatter pair. Matter, antimatter come together, they make a photon. It's symmetric. As the temperature of the universe dropped, you reach a point where you can no longer make particles with the energy you have. But you have all these matter and antimatter particle pairs that eventually find one another and annihilate and make a photon. But we're still cooling the universe.

[00:00:22]According to our known laws of physics, in the cooling universe, every matter and antimatter particle pair would have annihilated, made a photon. the photon would have cooled and no more matter would have been made and we would have had an entire universe of just light.

[00:00:35]That is not the universe we occupy. One out of a million, the photon did not make a matter antimatter pair. It just made a matter particle. So now the dance hall has 999,000 partners that can pair up and there's one left over. So everybody else becomes light and that one has no antimatter particle to mate with and it is frozen out of the universe and has become all the matter that we know and see today.

[00:00:57]We are the stuff that didn't get a date.