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Why do matter and antimatter annihilate? (bigthink.com)

submitted 3 weeks ago by [email protected] to c/science

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From forming bound states to normal scattering, many possibilities abound for matter-antimatter interactions. So why do they annihilate? There’s a quantum reason we simply can’t avoid.

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[–] barsquid 1 points 2 weeks ago (1 children)

Don't colliding galaxies mostly not actually touch? I thought there's so much space between everything it's almost entirely gravitational interactions. I'd assume almost no huge annihilation events from that, or extremely low frequency.

[–] [email protected] 2 points 2 weeks ago

The stars and planets, yes, but there is a lot of very diffuse gas that does collide