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.
Comet's tail. Made of dust and gas ejected when the nucleus is made. When a comet is warmed by the sun so that some of the ice becomes a gas.The solar wind pushes the tail away from the sun, the tail therefore is always being blown away from the sun no matter what position the comet is in with respect to the sun.