Wednesday, December 28, 2016

Dating Life Span Using the Eye Lens

"In an investigation recently published in Science, a team of researchers used radiocarbon dating to put together a timeline of the Greenland shark's lifespan," writes ARSTechnica. "Because Greenland sharks lack bones—they’re cartilaginous fish—conventional methods of tracking growth, like carbon dating of bones, won't work. Instead, the team used a modified radiocarbon dating technique that has worked before on other boneless animals: tracking the chronology of the eye lens. The eye lens nucleus is composed of inert proteins. The central portion of the lens is formed during prenatal development, and during growth, the tissue retains the original proteins, which were largely made before birth." Read more.

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