How many hearts does an octopus have?
An octopus has three hearts: two pump blood through the gills and one pumps it to the rest of the body.
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- Were narwhal tusks sold as unicorn horns?
“In medieval times, narwhal tusks were sold as unicorn horns.”
Reference: Smithsonian Magazine
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What is a narwhal's tusk?
A narwhal's tusk is actually a tooth that grows through its upper lip, and it's usually found on males.
Why are ravens kept at the Tower of London?
At least six ravens are kept at the Tower of London because of a legend that the kingdom will fall if they ever leave.