Creatinine is a toxin produced during the metabolism of meat in our body. Therefore, people with lots of muscles or who eat lots of meat always have a relatively high creatinine level, but it usually fluctuates in the normal range: 0.5-1.3mg/dL.
comet definition An object that enters the inner solar system, typically in a very elongated orbit around the sun. Material is boiled off from the comet by the heat of the sun, so that a characteristic tail is formed.
Comets only have a tail and coma when they are close enough to the sun to heat... The U.S. National Aeronautics and Space Administration describes comets as consisting of a nucleus, coma and tail. Comets only have a tail and coma when they are close enough to the sun to heat... The U.S. National Aeronautics and Space Administration describes comets as consisting of a nucleus, coma and tail. Comets only have a tail and coma when they are close enough to the sun to heat up. NASA explains that the nucleus of a comet consists of ice, dirt, dust and other solid particles. When comets are far from the sun, they are dark and cold, with only a nucleus. The coma is a cloud of dust, gas and vapor that forms as the nucleus is heated.