“Whatever the functions of sleep are, they seem to be so important that evolution is willing to put us in that place of potential danger by losing consciousness,” said Matthew Walker, a professor at University of California, Berkeley. Despite the best efforts of many top scientists, it has proven difficult to figure out what exactly it is about sleep that makes it so essential and worth the risk, in evolutionary terms.
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We know that we eat to give our bodies energy, we drink to stay hydrated, and we procreate to continue our species. For a long time scientists believed we slept simply to rest our tired bodies, however, we are starting to understand that sleep serves a whole variety of purposes. While some reasons we need to sleep remain a mystery, we do know that sleep is an anabolic process - one that rebuilds, repairs, and restores our body’s energy supplies after a long day. As you might guess, lack of sleep due to sleep disorders or other sleep problems can have a severely negative effect on your overall health.
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