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Jean Baptiste de Lamarck
French biologist Jean Baptiste de Lamarck says organisms change by adapting to their environment. These "acquired characteristics," he says, are then inherited: giraffes' necks are long because they must reach for their food. -
Charles Darwin
Charles Darwin Born -
Voyage of the Beagle
1831 Voyage of the Beagle. -
Darwin first penned his sketch
In 1842 Charles Darwin penned his first sketch of what became On the Origin of Species.[18] -
Wallace
Wallace wrote on natural selection. Both Darwin's and Wallace's ideas presented to the Linnaean Society of London -
Release of the book
Darwin published The Origin of Species. -
The First Fossil
only in the 1920s when such fossils were discovered in Africa
