- published: 06 Dec 2009
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Fossils (from Classical Latin fossilis; literally, "obtained by digging") are the preserved remains or traces of animals, plants, and other organisms from the remote past. The totality of fossils, both discovered and undiscovered, and their placement in fossiliferous (fossil-containing) rock formations and sedimentary layers (strata) is known as the fossil record.
The study of fossils across geological time, how they were formed, and the evolutionary relationships between taxa (phylogeny) are some of the most important functions of the science of paleontology. Such a preserved specimen is called a "fossil" if it is older than some minimum age, most often the arbitrary date of 10,000 years. Hence, fossils range in age from the youngest at the start of the Holocene Epoch to the oldest, chemical fossils from the Archaean Eon, up to 3.48 billion years old, or even older, 4.1 billion years old, according to a 2015 study. The observation that certain fossils were associated with certain rock strata led early geologists to recognize a geological timescale in the 19th century. The development of radiometric dating techniques in the early 20th century allowed geologists to determine the numerical or "absolute" age of the various strata and thereby the included fossils.
Clinton Richard Dawkins FRS FRSL (born 26 March 1941) is an Englishethologist, evolutionary biologist, and writer. He is an emeritus fellow of New College, Oxford, and was the University of Oxford's Professor for Public Understanding of Science from 1995 until 2008.
Dawkins first came to prominence with his 1976 book The Selfish Gene, which popularised the gene-centred view of evolution and introduced the term meme. In 1982, he introduced into evolutionary biology the influential concept that the phenotypic effects of a gene are not necessarily limited to an organism's body, but can stretch far into the environment. This concept is presented in his book The Extended Phenotype. In 2006, he founded the Richard Dawkins Foundation for Reason and Science.
Dawkins is a noted atheist, and is well known for his criticism of creationism and intelligent design. In his 1986 book The Blind Watchmaker, he argues against the watchmaker analogy, an argument for the existence of a supernatural creator based upon the complexity of living organisms. Instead, he describes evolutionary processes as analogous to a blind watchmaker. In his most popular book, his 2006 book The God Delusion, Dawkins contends that a supernatural creator almost certainly does not exist and that religious faith is a delusion. He is an opponent of creationism being taught in schools. He makes regular television and radio appearances, predominantly discussing his books, his atheism and his ideas and opinions as a public intellectual.