Present day carbon dating


09-Aug-2017 12:27

Researchers report that they have found a direct genetic link between the remains of Native Americans who lived thousands of years ago and their living descendants. Carbon-14 Dating, or just Carbon Dating, is an extremely useful dating method that’s been in use since 1947.We have advanced machines with amazing levels of accuracy and procedures to avoid any contamination.So let me explain how carbon dating works and then we’ll get on to some interesting stuff.When something dies, it stops taking in carbon-14 by breathing and eating, so the clock begins.Carbon dating allows us to track the time of death with great accuracy because it has a very short half-life.Parts of the work were carried out in a new laboratory jointly run by the Max Planck Society and the Chinese Academy of Sciences in Beijing. "A relative from the Tianyuan Cave: Humans living 40,000 years ago likely related to many present-day Asians and Native Americans." Science Daily. The genome sequence of a 24,000-year-old Siberian individual has provided a key piece of the puzzle in the quest for Native American origins.

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Analyses of this individual's DNA showed that the Tianyuan human shared a common origin with the ancestors of many present-day Asians and Native Americans.

Here’s the interesting part: when scientists go out and sample every fossil, rock, peice of coal, marble, wood, or any fossil they find low levels of Carbon-14 in them.

Now remember, anything past 250,000 years (or earlier) should be totally carbon dead if the assumptions hold.

Carbon Dating is part of a larger field called Radioisotope dating which is our primary method for assigning date to fossils, rocks, skeletons, and parchment.

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“Before the 1940s, scientists had no accurate way of determining the age of fossils or other ancient objects” notes Lemelson-MIT.Rate of decay isn’t really double-checked but it is based on the basic atomic structure of the atom.So now you know more about radioisotopes than 99% of the world."This individual lived during an important evolutionary transition when early modern humans, who shared certain features with earlier forms such as Neanderthals, were replacing Neanderthals and Denisovans, who later became extinct," says Svante Pääbo of the Max Planck Institute for Evolutionary Anthropology, who led the study.