“A kilogram of matter-antimatter annihilation releases a whopping ... researchers must suspend the antimatter particle so it doesn’t recombine with the regular particle. Typically, this ...

To accommodate the very high annihilation rate required to produce ... of the excited state can yield the original dark-matter particle, along with an electron–positron pair.

“A kilogram of matter-antimatter annihilation releases a whopping ... researchers must suspend the antimatter particle so it doesn’t recombine with the regular particle. Typically, this ...

those that have blown up and collapsed into black holes and neutron stars, or have withered into white dwarfs. Energy in this era is generated through proton decay and particle annihilation.