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How and why Darwin conclude that life stems from common orgins and ancestors?
Wiki User
∙ 16y ago
Darwin discovered through observations of nature that the natural world was not built as-is, as was previously thought, and that species had lived that are now extinct. Eventually he figured out the mechanism by which these changes occur and after that it wasn't a huge leap to look at a horse and then a zebra and a giraffe etc and realize they came ultimately from one ancestor because they have inherited traits which are the same.
That, in other words, the family tree of life on earth forks.
If you can see the similarities between a horse and a zebra and a human and another primate, you can see the similarities between all mammals, all animals, and eventually (with modern genetics) all life on earth, including plants, insects and microscopic life.
Wiki User
∙ 16y ago
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