Three tumor samples collected over time from a single patient shows how cancer evolves in response to treatment: A higher percentage of cancer stem cells in the final sample make a more aggressive disease.
Researchers at the University of British Columbia have shed new light on how mountain pine beetles produce an important pheromone called trans-verbenol, which could aid in efforts to better predict outbreaks.
Forget the bows and curtsies. Worker termites shake in the presence of their queens and kings. New research explains how these workers smell a royal presence.
Bacteria and Archaea must have evolved from the putative Last Universal Common Ancestor (LUCA). One hypothesis is that this happened because the cell membrane in LUCA was an unstable mixture of lipids. Now, scientists from the University of Groningen and Wageningen University have created such a life form with a mixed membrane and discovered it is in fact stable, refuting this hypothesis.
Fish, mice and likely all modern-day vertebrates share genetic elements first used to develop the unpaired dorsal fin in ancient fish. They later copied these elements to produce paired appendages, like pelvic and pectoral fins, arms and legs.
Researchers have identified the nerve cells that initiate a fly's escape response: that complex series of movements in which an animal senses, and quickly maneuvers away from, something harmful such as high heat. These results provide a window into a survival mechanism so important that it has persisted across evolutionary time, and today exists in virtually all animals -- including in people.
Dr. Stefano Vanin was part of an international team working on discoveries at the Holocene age hunter-gatherer site at Takarkori in south-western Libya.
Many tame domesticated animals have a different appearance compared to their relatives in the wild, for example white patches in their fur or shorter snouts. UZH researchers have now for the first time shown that wild house mice develop the same visible changes -- without selection, as a result of exposure to humans alone.
Interest in human evolution has stimulated new geological work in the southern rift valley of Kenya. A new Geological Society of America Bulletin article by Anna K. Behrensmeyer and colleagues presents the results of more than 15 years of field research on complex strata representing the last 500,000 years of geological history in an active rift system.
Tiny jumping fish can leap further as they get older, new research shows.