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Mammals and subsequently humanity may not have become dominant on earth had it not been for the global catastrophe that led to the extinction of the dinosaurs 65 million years ago.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 .
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.Now you are helping others, just by visiting wiki How.World Possible is a Nonprofit Organization with a mission to connect offline learners to the world's knowledge.Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.Archaeological geology as a science had to precede the proposal of evolution, as an understanding of the immense age of the earth is necessary to understand evolution.Cuvier established amongst the scientific community the fact of extinction.
Evolution only gained significant momentum after the theory of evolution, published by Charles Darwin in November 1859, implied that man was merely another product of life on earth, with origins shared by the other creatures and not its ultimate purpose. Wallace proposed the same theory at a joint presentation to the Linnaean Society in London .
Adaptation is a continuous response to the environment by changeable species.
This environment has a living (other animals) and non-living component (e.g. Widgets A unique adaptation usually precedes the entry into a new niche .
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erectus (including the Java and Peking hominids - the archetypal Missing Link) and H.