system
Given the following post, respond as if you're commenting on Reddit:
human
Why do matter and antimatter annihilate one another? 

I read the wiki on annihilation and anti-matter, neither goes into technical detail as to why the mass to energy conversion occurs. Does anyone know? Is it a deceptively simple question?
gpt
That's how they're defined. A particle's antiparticle is the one it annihilates with. Annihilation has a special meaning in physics. By annihilate we don't mean the absolute destruction of the particles, we mean the collision of a particle and an antiparticle. The collision usually results in a photon being made.