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Temple Grandin (born 1947), American animal scientist, [150] a designer of humane livestock facilities and writer on her experience with autism; Sam Granick (1909–1977), American biochemist known for studies of iron metabolism. Chapman Grant (1887–1983), American herpetologist, [151] historian, and publisher
Charles Robert Darwin (/ ˈ d ɑːr w ɪ n / [5] DAR-win; 12 February 1809 – 19 April 1882) was an English naturalist, geologist, and biologist, [6] widely known for his contributions to evolutionary biology.
Beginning of animal evolution. [54] [55] 720–630 Ma Possible global glaciation [56] [57] which increased the atmospheric oxygen and decreased carbon dioxide, and was either caused by land plant evolution [58] or resulted in it. [59] Opinion is divided on whether it increased or decreased biodiversity or the rate of evolution. [60] [61] [62 ...
In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect and classify animals, plants, and minerals, while publishing several volumes. By the time of his death in 1778, he was one of the most acclaimed scientists in Europe.
Controversy exists as to whether Charles Darwin recognized a true geographical-based model of speciation in his publication On the Origin of Species. [5] In chapter 11, "Geographical Distribution", Darwin discusses geographic barriers to migration, stating for example that "barriers of any kind, or obstacles to free migration, are related in a close and important manner to the differences ...
Although he was not the first thinker to advocate organic evolution, he was the first to develop a truly coherent evolutionary theory. [10] He outlined his theories regarding evolution first in his Floreal lecture of 1800, and then in three later published works: Recherches sur l'organisation des corps vivants, 1802. Philosophie zoologique, 1809.
A study of four mammalian genera: Hyopsodus, Pelycodus, Haplomylus (three from the Eocene), and Plesiadapis (from the Paleocene) found that—through a large number of stratigraphic layers and specimen sampling—each group exhibited, "gradual phyletic evolution, overall size increase, iterative evolution of small species, and character ...
Alfred Russel Wallace (8 January 1823 – 7 November 1913) was an English [1] [2] [3] naturalist, explorer, geographer, anthropologist, biologist and illustrator. [4] He independently conceived the theory of evolution through natural selection; his 1858 paper on the subject was published that year alongside extracts from Charles Darwin's earlier writings on the topic.