New fossil dates show beasts arose from their ancestors in half the time researchers previously thought
An early species of baleen whale relied on teeth rather than a filter for feeding
The biologist Joan Strassmann discusses the evolution of cooperation, how amoebas can teach us about competition, and why the definition of “organism” needs an overhaul
A newly discovered class of microbe could help to resolve one of the biggest and most controversial mysteries in evolution—how simple microbes transformed into the complex cells that produced animals, plants and fungi...
Fluid dynamics sheds light the Tribrachidium's approach to mealtime 550 million years ago
Human DNA is 1 to 2% Neandertal, or more, depending on where your ancestors lived. Svante Pääbo, founder of the field of paleogenetics and winner of a 2016 Breakthrough Prize, explains why that matters...
Teeth from these diminutive individuals suggest they belonged to a unique species rather than a modern human with a growth disorder, as previously suspected
DNA from Denisovans suggests they lived in Siberia for millennia and were more genetically diverse than Neandertals, but less diverse than modern humans
Among howler monkey species, loud calls come at the expense of testicle size and sperm production—or to put it another way, monkeys with the largest testes don't make as much noise...
A cat expert fields a host of questions from cat owners
Some prominent South Africans associate Homo naledi with stereotypes of blacks promulgated during decades of whites-only rule
Known group of 250 animals found to be genetically distinct from their island neighbors
Researchers built a physical model of the tail of the late Jurassic dinosaur Apatosaurus and found that its tail tip could have moved at supersonic speed to produce a whip-crack sound ...
The animals have 20 copies of a key tumor-fighting gene; humans have just one
By studying the interactions of babies and their mothers, researchers determined that babies smile in hopes others will smile at them. Erika Beras reports
Homo naledi ’s hands and feet could reveal answers about a key shift in human evolution—the move from a life of climbing trees to one spent walking on the ground...
Hiding out in what is now New Mexico, beaver-like animal used specialized dentition to live on plants
The biologist Nancy Moran has spent a career investigating the surprising nature of symbiosis, a phenomenon in which two species can appear to merge into one
Early human species may have had sharper hearing in certain frequencies than we enjoy, to facilitate short-range communication in an open environment. Cynthia Graber reports
Scientists are racing to solve the enduring mystery of how a large, dangerous carnivore evolved into a playful companion