Charles Robert Darwin, (12 February 1809 – 19 April 1882) was an English naturalist and geologist, best known for his contributions to evolutionary theory.
Darwin published his theory of evolution with compelling evidence in his 1859 book On the Origin of Species, overcoming scientific rejection of earlier concepts of transmutation of species.By the 1870s the scientific community and much of the general public had accepted evolution as a fact. However, many favoured competing explanations and it was not until the emergence of the modern evolutionary synthesis from the 1930s to the 1950s that a broad consensus developed in which natural selection was the basic mechanism of evolution.In modified form, Darwin's scientific discovery is the unifying theory of the life sciences, explaining the diversity of life.
Darvin's finches and the evolutionary theory.
Darwin had the idea that all the finches on the Galapagos Islands came from one native species which in some way was blown over on the islands for a very long time ago. Finches settled on the different ears , which are all very different and he began to regard life as something that evolves to adapt to their environment .
On one of the islands there were, for example, many insects and worms. The finches that had a sleek and sharp beaks, found it easier to grab insects in cracks and crevices. Therefore several finches with pointed beaks that survived and received the most pups when they could get more food than the other finches .
On another of the islands, many plants with large heavy nuclei. The cores gave most food for finches with sharp beaks.
In the end, finches so different from the original finkeart that they could not get the kids together and were therefore become a new species . There are currently 13 different species of finches originating from the same ancestors .
The same conditions apply to many of the other birds, turtles and iguanas in the Galapagos Islands.
Darwin's theory of the " Origin of Species " sometimes referred to as the theory of evolution , which assumes that there is some variation , a little mutual differences between members of a species . Some individuals are a little faster than others, while others are a little better at finding food. Such properties are inherited and passed on from parents to children and those who are best suited to survive in competition with other individuals.