Paleontology question about evidence?

Paleobiology databases & discussion boards

http://paleodb.org/cgi-bin/bridge.pl?a=basicTaxonI...

http://www.heightow.com/rar/konglong/show.asp?Id=1...

http://www.dinodata.org/index.php/tarpit/news/4751...

http://dml.cmnh.org/2005Feb/msg00013.html

http://www.springerimages.com/Images/LifeSciences/...

Articles can be read in academic libraries or purchased as reprints.

The fossil list is solid information for evolution. The oldest creatures got here across are about the least confusing (Archean micro organism, about 3.5 billion years old). In older fossil layers you note less demanding creatures and a lot less range, at times interrupted by technique of mass extinction events. no human being has ever got here across a creature in an section the position it wasn't anticipated by technique of evolution. as well that, there is comparative anatomy. sturdy anatomists can note of each groove, hollow, and curve in bone. searching at previous animals, they can make sure the position the animal ought to have fit evolutionarily per bone structure, between different issues. Fossils have also printed a plethora of "transitional varieties", like Archeopteryx (from theropod dinosaurs to birds), Ambulocetus (from land mammal to whale), and Icthyostega (from lobe-finned fishes to pre-amphibian tetrapods). And, of route, they have sturdy information for growing old the rocks, so the equipment isn't arbitrary in any respect. Radioactive relationship measures the contents of radioactive isotopes in a fabric when it comes to the quantity of "daughter" isotope the former produces. opposite to what's usually theory, carbon-14 won't be able to be used as a lot as now issues older than some thousand years. For relationship issues million of years old, they wrestle to locate radioactive istopes of argon and potassium, and for even older issues they could attempt to locate isotopes of uranium.