The rejection of evolution by religious groups also termed the creation vs. In accordance with creationism , species were once widely believed to be fixed products of divine creation, but since the midth century, evolution by natural selection has been established by the scientific community as an empirical scientific fact. Any debate is universally considered religious, not scientific, by professional scientific organizations worldwide: in the scientific community, evolution is accepted as fact  and efforts to sustain the traditional view are almost universally regarded as pseudoscience. Christian fundamentalists repudiate the evidence of common descent of humans and other animals as demonstrated in modern paleontology , genetics , histology and cladistics and those other sub-disciplines which are based upon the conclusions of modern evolutionary biology , geology , cosmology , and other related fields. They argue for the Abrahamic accounts of creation, and, in order to attempt to gain a place alongside evolutionary biology in the science classroom, have developed a rhetorical framework of " creation science ". In the landmark Kitzmiller v.
Carbon dating fossils
Carbon dating fossils – Access Cities
In the geologic record , the K—Pg event is marked by a thin layer of sediment called the K—Pg boundary , which can be found throughout the world in marine and terrestrial rocks. The boundary clay shows unusually high levels of the metal iridium , which is more common in asteroids than in the Earth's crust. Other causal or contributing factors to the extinction may have been the Deccan Traps and other volcanic eruptions,   climate change , and sea level change. A wide range of species perished in the K—Pg extinction, the best-known being the non-avian dinosaurs. It also destroyed myriad other terrestrial organisms, including some mammals , birds ,  lizards ,  insects ,   plants, and all the pterosaurs.
How Do Scientists Determine the Age of Dinosaur Bones?
This is how carbon dating works: Carbon is a naturally abundant element found in the atmosphere, in the earth, in the oceans, and in every living creature. C is by far the most common isotope, while only about one in a trillion carbon atoms is C C is produced in the upper atmosphere when nitrogen N is altered through the effects of cosmic radiation bombardment a proton is displaced by a neutron effectively changing the nitrogen atom into a carbon isotope.
Carbon is a radioactive isotope used to date organic material. Its consistent rate of decay allows the age of an object to be determined by the proportion of carbon to other carbon isotopes. This process is called radiocarbon dating. Carbon is also used as a radioactive tracer for medical tests. Carbon dating works by comparing the amount of carbon in a sample to the amount of carbon