Particles that are postulated to come in pairs (as in the up and down varieties) of similar mass with one member having a charge of + 2/3 and the other a charge of - 1/3. Quarks are subatomic particles believed to be among the fundamental constituents of matter. In much the same way that protons and neutrons make up atomic nuclei, these particles themselves are thought to consist of quarks.

Articles on that refer to Quark

Tangible Nanomoney By Robert A. Freitas Jr.

News Articles that refer to Quark

At One Trillion Degrees, Even Gold Turns Into the Sloshiest Liquid
Mini Big Bang Created, Puzzling Results Too Explosive

Related Links

Theory of quarks
What are quarks?