Dating austin smith
[12/14/03, on his character Sam Gamgee] I spent the film doing lots of things, but the crying is what lived. and then he cuts out the heroic moments and you're left thinking, "I look like a big baby".
The new isotope is called "radiocarbon" because it is radioactive, though it is not dangerous.
Specimens which lived and died during a period of intense volcanism would appear older than they really are if they were dated using this technique.
The ratio can further be affected by C-14 production rates in the atmosphere, which in turn is affected by the amount of cosmic rays penetrating the earth's atmosphere.
The amount of cosmic rays penetrating the earth's atmosphere is itself affected by things like the earth's magnetic field which deflects cosmic rays.
Precise measurements taken over the last 140 years have shown a steady decay in the strength of the earth's magnetic field.