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How It Works Book of Incredible Earth (Digital)

How It Works Book of Incredible Earth (Digital)

1 Issue, How It Works Book Of Incredible Earth 6th Edition

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What are fossils?

Obliterating the traditional perception of the origins and evolution of life on Earth, fossils grant us unique snapshots of what once lived on our everchanging planet
What are fossils?
Types of fossilisation Dependent on climate and ground conditions, deceased animals can be fossilised in many ways Carbon dating A crucial tool for palaeontologists, carbon dating allows ancient fossils to be accurately dated Carbon dating is a method of radioactive dating used by palaeontologists that utilises the radioactive isotope carbon-14 to determine the time since it died and was fossilised. When an organism dies it stops replacing carbon-14, which is present in every carbonaceous organism on Earth, leaving the existing carbon-14 to decay. Carbon-14 has a half-life (the time it takes a decaying object to decrease in radioactivity by 50 per cent) of 5,730 years, so by measuring the decayed levels of carbon-14 in a fossil, its time of death can be extrapolated and its geological age determined. The origin of life on Earth is…
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How It Works Book of Incredible Earth (Digital) - 1 Issue, How It Works Book Of Incredible Earth 6th Edition

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