Huxley pointed out the huge gap between homosapiens and beasts didn't always exist. Gap took place over evolutionary period, with powerful adaptations for apes.
Evolution is often related to climate and environment, history would be different if conditions changed.
Evolution works though:
Mutation: producing of a genetic variation, which drifts (varies among the population)
Gene Flow: introduction of new genes from other populations
Natural Selection: differential reproduction of those with adaptive traits produce more offspring
These processes form new organisms by:
Populations evolving in a linear manner, as small changes in one generation to another improve adaptation. This accumulates over time and an older species may from into a new one.
Evolution proceeding in a branching manner, in response to isolating mechanisms. This leads to divergent races then divergent species
Charles Darwin 1809-1892
Study of medicine in Edinburgh, not suited for some went to Christ's College, Cambridge and studied theology
Took position of naturalists
mapping on HMS Beagle in 1831
Mapping along S. America, Galapagos Islands, Australia and back to England
On the Origin of Species (1859)
Observed each island had its own for of tortoise, mockingbird and finch; all with close relations to one another
Darwin was not inventor of evolution
Jean Baptiste de Lamarck, a philosopher and naturalist proposed evolution in 1809
Darwin was intrigued by the problem of origin and diversity and diversification in geographical dimension in horizontal evolution
In 1838 he conceived the mechanism that could account for evolution: natural selection
His full theory of evolution was published on November 28, 1859 in The Origin of Species
In his book, Darwin proposed his broad explanatory scheme comprised a... [continues]
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