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Believe it or not, worms can calculate their way to food through a process roughly equivalent to a derivative in calculus. Unfortunately, humans and other animals are also able to do so, although there is still not enough evidence to support this claim. Basically, worms are able to locate food by tasting the environment in different places. They then approximate if the taste becomes stronger or weaker, and the result of the comparison is then used to determine whether or not to change direction.... Read »