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or you could have followed the link in the tweet. n00bWell apparently it’s give or take 120 years.
They do carbon-dating on tissue samples from the eye. Very interesting, thanks for prompting me to google that.
Old and cold: extreme longevity in Greenland sharks
Analysis of eye tissues suggests slow-growing species is Earth's oldest vertebrate, and raises concerns about potential impacts from fishing.www.vims.edu