Fifteen species are on the brink of extinction, and could die out during our lifetimes, finds new research.
Understanding how the brain causes thirst could help scientists learn what goes awry in disorders that make people drink too much or too little fluid.
Contest yields a stunning array of pictures of nature in action.
What happens when you place an exercise wheel in the wild? An unusual cast of animal characters, from frogs to slugs, has a great time!
Human settlement history over the last 1000 years is reflected in the genetic sequence of mouse mitochondrial DNA.