A new fossil discovery is central to primate ancestry and adds to our understanding of how life on land recovered after the Cretaceous-Paleogene extinction event 66 million years ago that wiped out all dinosaurs, except for birds.

The next time you eat seafood, think about the long-term effects. Will consistently eating the biggest fish or the biggest conch, mean that only the smaller individuals will have a chance to reproduce?

Scientists have designed and built an on-demand video device for white-faced saki monkeys to activate as and when they like. It's up to the animals to decide whether they want to step inside the device - the equivalent of pressing play - to watch the video of the week, from sealife like fish and jellyfish to wiggly worms and other zoo animals to abstract art and lush forests.

Scientists have sequenced the genome of a capuchin monkey for the first time, uncovering new genetic clues about the evolution of their long lifespan and large brains.

Humans aren't the only mammals that form long-term bonds with a single, special mate -- some lemurs and other animals do, too. Researchers are mapping the hormone receptors that underlie these primates' ability to pair up for the long haul. Their findings suggest the brain circuitry that makes love last in some species may not be the same in others.