In scientific terms, evolution is both a theory and a fact. A fact refers to a scientific explanation that has been tested and confirmed often enough that there is no reason to keep looking for additional examples. Scien... More » Science Biology

Fossils provide a record of life on Earth from as long as 1 billion years ago, showing how organisms, animals and plants have changed over time. These records can be dated, so they are a physical representation of evolut... More » Pets & Animals Dinosaurs

The theory of evolution is supported by biochemical evidence; many of the same molecules and biochemical processes occur within all living organisms, from single-cell bacteria to humans. Originally, scientists couldn't u... More » Science Biology
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Despite the fact that he refused to believe in evolution, naturalist and palaeontologist Georges Cuvier (1769-1832) contributed to Charles Darwin's theory of evolution, particularly in terms of natural selection, by esta... More » Science Biology

The answer to the question of whether evolution is a theory or fact is "both," and the answer to the question of whether extinction of the dinosaurs affected other species is "yes." Another question is whether the evolut... More » Science Biology

Jean Baptiste Pierre Antoine de Monet, Chevalier de Lamarck, was one of the first naturalists to propose a comprehensive theory of evolution. His proposed mechanisms were different from those of Charles Darwin and Alfred... More » Science Biology

The achievement that Charles Darwin is most known for is his development of the theory of evolution, particularly in his book "On the Origin of Species." In the book, Darwin collects evidence and crafts arguments showing... More » Science Biology