A woodcut from 1638
A woodcut from 1638 showing a woman applying leeches to her body for medicinal purposes.
Did you know that leeches have 32 brains?
Image via Wikimedia Commons, public domain

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 A woodcut from 1638 showing a woman applying leeches to her body for medicinal purposes.
Did you know that leeches have 32 brains?
Image via Wikimedia Commons, public domain

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