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Most labs are only able date carbon back to 50,000 years ago, but ANSTO’s super-sensitive, low background accelerator mass spectrometry facility can pick up tiny amounts of radioisotopes – comprising a quadrillionth of the total atoms in a sample.That’s the equivalent of finding one ant out of all the ants on Earth.Working out ratios of the radioactive and stable carbons tells you the age of the sample.But the older the sample the less carbon-14 remains, and what is left becomes harder to find.ANSTO chemist Fiona Bertuch extracted collagen from the lion’s bones.She extracted the carbon from the collagen, the claw and hair samples and processed it into black graphite powder.In the summer of 2008, a resident of the Russian village of Anyuisk stumbled upon a stack of bones submerged in the muddy waters of the Malyi Anyui River.The bones made up the first near-complete skeleton of the now-extinct cave lion found in Russia.

It gets together with two oxygen atoms to make carbon dioxide, a molecule that plants welcome to transform into fuel.

Specifically, the math of ratios and the chemistry of carbon-14. When these tiny particles from deep space fly into Earth, they inevitably strike particles in our atmosphere.

This collision causes a billiards-style reaction: Cosmic radiation knocks a neutron off a particle, which in turn smacks into nitrogen, which then knocks off a proton from the nitrogen.

For example, if half the original carbon-14 levels are present in a discovered antler, then its owner died 5,730 years ago.

If a fourth of the original carbon-14 levels are present, then the animal died happened 11,460 years ago. To prove his theory correct, he extracted pure carbon from ancient samples and built his own radiation detection tool.




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