One of the keys to performing like an elite athlete — or at least having the metabolism of one — may be pooping like one. Transplanting feces from certain top-level cyclists and soccer players ...

As thousands of bats launch nightly hunting, the cacophony of a dense crowd should stymie echolocation, a so-called “cocktail party nightmare.” ...

An expanding geographic range for these close Neandertal relatives leaves Denisovans' evolutionary status uncertain.

Some question whether the pups are really dire wolves, or just genetically tweaked gray wolves. But the technology could be used to help at-risk animals.

No longer considered functionless, the “rediscovered” rete ovarii may be crucial for understanding “unexplainable” infertility and ovarian disorders.

Experiments point to how scientists can strengthen or weaken memories, which may eventually lead to treatments for Alzheimer’s disease or PTSD.

New dinosaur fossil tracks on the Isle of Skye reveal that the once-balmy environment was home to both fierce theropods and massive sauropods.

Mineral formations in caves reveal recurring periods of humidity in the Arabian Desert over the last 8 million years.

The KATRIN experiment in Germany nearly halved the maximum possible mass for neutrinos, setting it at 0.45 electron volts.

As global temperatures rise, scientists debate the pros and cons of solar geoengineering, a strategy to cool Earth by reflecting sunlight into space.

Texas child dies from the preventable disease, HHS Secretary Kennedy is now urging measles vaccination yet still touting unproven treatments.

Some of the unusual rocks carry stories about water on Mars. One has hints of long-gone microbes. All tell of a dynamic, complex planet.