Danish scientists found the ancient creature — which is believed to be 512 years old and is 18ft long.
The shark is the world's oldest vertebrate – an animal with a backbone – and may have been born in 1505, when King Henry VIII was just 14 years old.
According to the journal Science, Greenland sharks grow at just one cm a year.
So when they discovered a female shark measuring a whopping 18 feet, they knew this creature had to be incredibly old.
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