Navel stones are hardened clumps of oil and dead skin cells that camp out in your belly button. Scientifically speaking, they're called omphaloliths. And — you guessed it — there are plenty of great ...
Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...
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