Potassium-argon dating, another dating method, is possible due to volcanic ash and rocks found near many fossil sites.

After 5770 years, half of the carbon-14 in a fossil decays to nitrogen-14.

Since the ratio of carbon-12 to carbon-14 in a living organism remains the same as in the environment around them because the organism constantly eats and replenishes it, if it were to die, the ratio would change greatly after many years.

It is the difference between this ratio now and the time is died that allows a date for it to be established.

Several points will be outlined, including the general physical changes that occurred between several key species on the phylogeny of man, and a discussion of dating methods used to pinpoint the age of the fossils.

This essay will begin with a brief discussion of dating techniques.

In the study of hominid evolution, two main methods of dating are used: carbon-14 and potassium-argon dating.Carbon-14 dating involves the decay of radioactive C-14, which has a half life of 5770 years. It can tell them the age of the rock, and that's probably the age of the fossil.An exception is carbon-14 dating which, in the right circumstances, can tell you the age of the bit of animal or plant.Human Evolution And The Fossil Record Essay, Research Paper Human Evolution and the Fossil Record Scientists continue to debate the history of man.It is generally agreed upon by the scientific community, however, that humans evolved from lesser beings, and this essay will function to provide evidence to support this claim.