Fish have fins and gills, but they don't have necks. That's partly because it would be difficult to swim quickly with a neck that wagged back and forth in the water.
Evolution is among the most substantiated concepts in science and is the unifying theory of biological science. Charles Darwin co-originated, with Alfred Russel Wallace, the theory of evolution by natural selection. His masterwork, the 1859 "Origin of Species," offered ample evidence for evolution having occurred, as well as the first strong explanation for its mechanism, natural selection. Modern evolutionary theory incorporates these concepts: species change over time; genetic mutations are responsible for the changes; individuals with beneficial genetic mutations will survive preferentially compared with their competitors, in a process known as natural selection; those successful individuals' more numerous offspring will spread the beneficial genetic constructs throughout the population; when enough genetic changes reproductively isolate a population, that population has become a new species. Here you'll find news and information on evolution and the battle with proponents of so-called creation science.
Neanderthal men carried a Y chromosome that often may have led to miscarriages if or when Neanderthals and modern humans got together, new research suggests.
Astrophysicist Tyson tweeted: "If there were ever a species for whom sex hurt, it surely went extinct long ago." Sorry Dr. Tyson, evolution don't care if sex is painful.
Around 18 million years ago, subterranean army ants returned to the surface and regrew the parts of their brains related to vision.
Scientists who forced volunteers to chew raw goat flesh (yes, chew) have found that such meat-gnawing likely caused human teeth and jaws to shrink throughout our evolutionary history.
Tyrannosaurus rex, king of the dinosaur age, wasn't a North American native, a new study suggests. And once the beast came onto the scene it muscled out all its competitors and took over.
A handwritten letter by famed naturalist Charles Darwin to a British marine biologist was to be auctioned off yesterday (Feb. 25) by Nate D. Sanders Auctions, a Los Angeles-based auction house.
Wisdom teeth may have shrunk during human evolution as part of changes that started with human tool use, according to a new study.
Ancient trysts between Neanderthals and modern humans may have influenced modern risks for depression, heart attacks, nicotine addiction, obesity and other health problems, researchers said.
Stone tools discovered on the Indonesian island of Sulawesi dating back at least 118,000 years suggest that an unknown lineage of toolmakers, relatives of the diminutive "hobbit" once lived there.
Modern birds — from the soaring eagle to the tiny hummingbird — share a common ancestor that lived about 95 million years ago in South America, a new study finds.