Antimatter

Antimatter is a highly dangerous substance used by the Covenant. It releases a massive amount of energy when coming into contact with real matter, such as air, thus causing an powerful explosion that releases gamma rays. Antimatter is known to occur naturally in extremely small amounts, but can be made artificially in larger, but still extremely small amounts by Humans. However, the Covenant are suspected as having a large amount of either natural or artificial Antimatter to use as weaponry and possibly a power-source. It can also be used in small amounts as a breaching charge to board ships. Humanity is thought to currently have Antimatter, but apparently not enough for it to be used as weaponry. The Covenant, however have used Antimatter as weaponry on more than one occasion, but how they get their Antimatter remains a mystery.

Uses

 * Antimatter Charge
 * Covenant Bomb

Trivia

 * Antimatter is a real substance.
 * Several other Science Fiction sagas and stories, besides Halo, use antimatter as a weapon or in context, such as Angels & Demons.
 * A positron is the antimatter equivalent to an electron and an anti-proton is the antimatter equivalent to a proton. Every element has an antimatter equivalent.