Parallel matter

Parallel matter is a generic name given to various forms of matter that behave in parallel ways to n-matter. The term mirror matter can also be used to describe these forms of matter. Types of parallel matter include antimatter, which has parallel electromagnetic properties to n-matter, negative matter, which behaves identically to normal matter yet has negative Gravity, and tachyonic matter, which has negative mass and negative Gravity, and travels faster than the speed of light.

Antimatter
"Main article: Antimatter"Antimatter is matter composed of n-matter antiparticles. An atom of antimatter is composed of antiquarks and antileptons, making negative protons and positive electrons (positrons). Chemically, it behaves in exactly the same manner as n-matter. It also has the same properties of mass and Gravity. When antimatter comes into contact with n-matter, the two undergo annihilation, converting all of their mass into energy. For this reason, antimatter can be used as a fuel or as a weapon.

Negative matter
"Main article: Negative matter"Negative matter has identical physical and chemical properties to n-matter, but it generated negative Gravity (antigravity).

It does not annihilate upon contact with n-matter, since it is electromagnetically the same. Due to this, composite particles can be made of a mixture of n-matter and negative matter.

Negative antimatter also exists.

Due to the fact that, despite it's negative gravity, it does not have negative mass (and therefore travels below the speed of light), this type of matter is sometimes referred to as false negative matter.

Tachyonic matter
"Main article: Tachyonic matter"Tachyonic matter is matter with negative mass. Not only does it produce negative Gravity, it also travels faster than the speed of light. Normally, this kind of matter does not interact with normal matter in any way. Due to it being the complete opposite of n-matter, this substance is often termed true negative matter.