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Picture credits: Sponge by 'andrew104' at echinoid by 'topofbroadway' at lobster by David Galvan at shark by 'pugwash00' at
References: A Dynamic Stratigraphy of the British Isles, A.
Mass extinction events and an organism's unique adaptations mark the history of evolution, both of which may lead to adaptive radiation.
( Adaptive radiation is the evolution from an unspecialised ancestral stock of many different species that adapt to a variety of ecological roles (see books)).
is heritable) and arises through processes such as mutation and recombination.
 Natural selection, gene flow and random genetic drift (the random change in gene combinations with each generation) drive evolution, resulting in a change in gene frequencies within populations .
Sellwood, 1992; British Geological Survey, Geology of the country around Brighton and Worthing, B.
The evolution of a species is linked to the environment.
Safety notice: Fossil hunting can at times pose a risk to personal safety, in particular within environments close to the coast, cliffs or in quarries and when using the tools and equipment illustrated.
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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 .