Slartibartfast39 t1_iu84jvy wrote
I seem to remember being taught that there should be equal amounts of matter and anti matter in the universe but there isn't. As when they meet both undergo annihilation the possibility is that this occurred early on in the universe and there was an excess of matter over antimatter. I was taught that were not sure why.
Shadowkiller00 t1_iu850n3 wrote
Yes, this and the difference in the amount of matter and antimatter was just the tiniest fraction of a percent, but that tiny fraction difference is enough to leave behind all the matter that exists in the universe.
ladan2189 t1_iu8xpfp wrote
As the current theory says. The current theory also says that there should be massive amounts of dark matter and dark energy in the universe but we can't detect it anywhere. There's always a chance that the theory is wrong. It's what happens when your whiteboard physics can't be disproven but there's no evidence to support it either.
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