14c dating range
Evolution & Ecology " (see its HOME PAGE .) The result is that some areas, such as the glossary are shared.Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source "head, top." Sense extended early 14c.to "person, individual." Meaning "collection of votes" is first recorded 1620s, from notion of "counting heads;" meaning "survey of public opinion" is first recorded 1902.At the onset of the 20th century, most scientists had accepted the great antiquity of the earth, the theory of evolution and that humanity had evolved from an ape ancestor, but by 1908 the fossil evidence of early man was scarce.Biologists included principles from genetics in evolutionary theory during the 1920s and 1930s.Between the mid-1930s and mid 1940s geneticists, systematists and palaeontologists collaborated to create a united approach to evolution, the "Modern Synthesis".
Mass extinction events and an organism's unique adaptations mark the history of evolution, both of which may lead to adaptive radiation.Living orders of placental mammals , be it bats, humanity, whales or camels, have as their common ancestor a small insectivore creature that went through a major phase of adaptive radiation during the Early Cenozoic Era .We humans are first animals, then mammals, then primates.sapiens (including Neanderthals and Cro-Magnon) (see the modern taxonomic classification of humans).This formed the foundation of the neo-Darwinian evolutionary theory.