Antimatter is the anti-state of normal matter. When the positive and negative matter meet, the two parties will annihilate each other and cancel each other, explode and generate huge energy. The energy release rate is much higher than that of a hydrogen bomb explosion. According to the Big Bang theory, the temperature of the medium in the very early universe was very high. Thermal collisions between particles will produce any elementary particles in pairs. When the paired annihilation and paired generation of particles reach a statistical balance, the medium of the universe is a mixed gas composed of all elementary particles.
