Paleontology

-The greek words Palaeos meaning old, ont meaning creature, and logos for speech or thought. 

-Study of organisms of the past to determine their evolution, their interactions with each other, and with their environment.

-Fossils come from preserved signs of past life (feces, plants, animals, nests, footprints, etc.)

-Fossils are made in a variety of different ways;

*http://www.fossils-facts-and-finds.com/how_are_fossils_formed.html

-One can learn how old fossils are by looking at the radioactive isotopes (http://www.bbc.co.uk/nature/fossils)

-Fossils are almost always found in sedimentary rock (http://paleo.cc/kpaleo/fossfind.htm)