Radiometric dating relies on the properties of isotopes.These are chemical elements, like carbon or uranium, that are identical except for one key feature -- the number of neutrons in their nucleus.Paleontology is a rich field, imbued with a long and interesting past and an even more intriguing and hopeful future.Many people think paleontology is the study of fossils. Paleontology is traditionally divided into various subdisciplines: Micropaleontology: Study of generally microscopic fossils, regardless of the group to which they belong.The Mayan calendar used 3114 BC as their reference.More recently is the radiocarbon date of 1950 AD or before present, BP.
If you asked the same question of an educated European in AD 1900 you would have received a quite different answer.
The story of this great change in the conception of the history of Earth is not a simple one.
The chronicle of this great change can be broken into five periods; ran from AD 1600-1700.
Invertebrate Paleontology: Study of invertebrate animal fossils, such as mollusks, echinoderms, and others.
Vertebrate Paleontology: Study of vertebrate fossils, from primitive fishes to mammals.
The Greeks consider the first Olympic Games as the beginning or 776 BC.