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Radioactive and non-radioactive carbon dioxide mix throughout the atmosphere, and dissolve in the oceans.Through photosynthesis carbon dioxide enters plants and algae, bringing radiocarbon into the food chain.I have tried here to answer some of the frequently asked questions that I receive from students via email, as well as providing some basic information about scientific dating methods."Everything which has come down to us from heathendom is wrapped in a thick fog; it belongs to a space of time we cannot measure.Rasmus Nyerup's quote reminds us of the tremendous scientific advances which have taken place in the 20th century.

Professor Gerry Mc Cormac and Dr Paula Reimer pictured in the 14 Chrono Centre at Queen's University Belfast.

And then you can use that rate to actually determine how long ago that thing must've died. It would be a pretty reasonable estimate to say, well, that thing must be 5,730 years old.

Researchers have produced a new archaeological tool which could answer key questions in human evolution.

Radiocarbon then enters animals as they consume the plants (figure 2).

So even we humans are radioactive because of trace amounts of radiocarbon in our bodies.

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And as far as we know, it has been forming in the earth’s upper atmosphere at least since the Fall, after the atmosphere was made back on Day Two of creation week (part of the expanse, or firmament, described in Genesis 1:6–8). Cosmic rays from outer space are continually bombarding the upper atmosphere of the earth, producing fast-moving neutrons (sub-atomic particles carrying no electric charge) (figure 1).1 These fast-moving neutrons collide with nitrogen-14 atoms, the most abundant element in the upper atmosphere, converting them into radiocarbon (carbon-14) atoms.

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