There has been wide agreement among paleontologists that dinosaurs became extinct roughly 65.5 million years ago.
Various theories as to the cause of this extinction have been suggested, ranging from a huge asteroid striking the earth to changes in global sea levels and climate to sustained periods of volcanism.
This will be covered in the chapters, Primitive Environment (chapter 9), and DNA (chapter 10).
Third, evolution of living organisms into more advanced life forms by natural selection or mutations.
Many people are under the false impression that carbon dating proves that dinosaurs and other extinct animals lived millions of years ago.
What many do not realize is that carbon dating is not used to date dinosaurs. Carbon dating is only accurate back a few thousand years.
Human carbon dioxide emissions have sped up the reduction of the carbon isotope 14C in the Earth’s atmosphere, bringing into question the accuracy of the method’s results.
The author of a new study published in the journal argues that the level of distortion caused by anthropogenic emissions can actually be precisely identified.
Simonetti and colleagues from the University of Alberta used a U-Pb (uranium-lead) dating technique to analyze a fossilized dinosaur bone discovered in New Mexico.
This was dealt with in the chapter by that name (chapter 1).
Second, generation of living organisms from non-living matter, or origin of life.
Radiocarbon dating can still be considered a reliable method for determine the age of artefacts and materials, according to a study published this week.
Recently, it was suggested that the dates offered by radiocarbon dating are increasingly being distorted by external factors.