Julius Nielsen: 2 ideas worth knowing

2 ideas from Julius Nielsen, each explained in a minute and credited to the original work. Free on Savvy.

This shark can live for over 300 years
Greenland sharks grow so slowly that scientists couldn't age them by normal methods, so a 2016 study radiocarbon-dated proteins locked in the crystalline lens of their eyes instead…
— Julius Nielsen et al., Eye Lens Radiocarbon Reveals Centuries of Longevity in the Greenland Shark
Some sharks swimming in the Arctic right now were alive before the Industrial Revolution
In 2016, researchers radiocarbon-dated the eye lenses of Greenland sharks, which stop changing chemically after formation, and estimated the largest individual at around 392 years …
— Julius Nielsen et al., Eye Lens Radiocarbon Reveals Centuries of Longevity in the Greenland Shark

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