It’s 7 metres long, can weigh almost a tonne and can live for 400 years or more – meaning some around today were born in 1625…

The Greenland shark is one of the world’s largest sharks, but it grows slowly, at only a few centimetres over several years, hinting at a long lifespan.

But until 2016 biologists could only guess at the life expectancy of these…

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