Wallace was one of the leading evolutionary thinkers of the 19th century, working on warning coloration in animals and reinforcement (sometimes known as the Wallace effect), a way that natural selection could contribute to speciation by encouraging the development of barriers against hybridisation.

Feb 13, 2025 · Wallace’s research on the geographic distribution of animals among the islands of the Malay Archipelago provided crucial evidence for his evolutionary theories and led him to devise what soon became known as the Wallace Line, the boundary that separates the fauna of Australia from that of Asia.

Jun 4, 2019 · Alfred Russel Wallace was a key contributor to the theory of evolution and the theory of natural selection. His paper detailing the natural selection mechanism was published together with writings by Charles Darwin in 1858, setting the basis for our understanding of how species evolve over time.

Oct 19, 2023 · By 1855, his observations led him to the conclusion that living things change over long periods of time—they evolve. However, he could not explain how or why they evolve. Then, in 1858, while still in Southeast Asia, he became ill again.

But in the mid-1800s, Darwin and the British biologist Alfred Russel Wallace independently conceived of a natural, even observable, way for life to change: a process Darwin called …

Alfred Russel Wallace (1823-1913) was a man of many talents - an explorer, collector, naturalist, geographer, anthropologist and political commentator. Most famously, he had the revolutionary idea of evolution by natural selection entirely independently of Charles Darwin.

Alfred Russel Wallace discovered the concept of evolution by natural selection. Although now rarely mentioned as the discoverer (Darwin, who discovered the theory independently, is usually cited) Wallace enjoyed a high reputation in his lifetime and received many of science’s most prestigious awards.

Alfred Russel Wallace (1823 – 1913) was a fearless Victorian naturalist and explorer. He is most known for having come up with the revolutionary idea of evolution by natural selection...

Alfred Russel Wallace was a naturalist who independently proposed the theory of evolution by natural selection. A great admirer of Charles Darwin, Wallace produced scientific journals with...

Apr 30, 2013 · By 1855, Wallace had come to the conclusion that living things evolve. But he didn't figure out how until one night three years later. He was on the island of Halmahera, ill with a fever, when it...