You can help Amazing Discoveries reduce costs by upgrading or replacing your internet browser with one of the options below.We thank you in advance for partnering with us in this small but significant way. All methods of radioactive dating rely on three assumptions that may not necessarily be true: It is assumed that the rate of decay has remained constant over time.While there is no proof that the rates were different in the past than they are today, there is also no proof that they were the same.
, and is so rare that only one-in-a-trillion carbon atoms are carbon-14.
With a half-life of just over 5,000 years, any Carbon-14 atoms that were created in stars, billions of years ago, have long since decayed away into nitrogen atoms.
About 1.1% of all carbon is Carbon-13, with one extra neutron.
But there is another form of carbon that, while not at all abundant, is definitely worth talking about.
Some scientists argue that the magnetic field of the earth has declined over time.