Hyperons are particles that are made of quarks. What makes them different from other baryons (particles made of three quarks) is that they must have at least one strange quark, but no charm quarks or bottom quarks. Strange quarks have a property known as strangeness. Strangeness causes the strange quark–and all other particles bonded with it–to not decay by strong force, but instead due to the much slower weak force. Since all quarks are fermions (which means that no two of them can be in the same point in space at the same point in time), each quark has a spin of 1/2, adding up to a total spin of 3/2 for a hyperon. This quickly decays into a 1/2 spin particle.