Antimatter

Anti-Matter is a highly dangerous substance that releases a massive amount of energy when coming into contact with matter, such as air, thus causing an explosion. Anti-Matter 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 Anti-Matter to use as weaponry and possibly a power-source. Humanity is thought to currently have Anti-Matter, but apparently not enough for it to be used as weaponry. The Covenant, however have used Anti-Matter as weaponry on more than one ocasion, but how they get their Anti-Matter remains a mystery.

Uses

 * Covenant Bomb


 * Anti-Matter Charge

Trivia

 * Anti-Matter is a real substance.
 * Several other Science Fiction sagas and stories, besides Halo, use Anti-Matter, such as Angels & Demons.