For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are ...

"This book was originally published as an issue of Philosophical transactions of the Royal Society B; Biological sciences (volume 363; number 1496) but has been materially changed and updated"--Title ...

To understand the origins of multicelled life, researchers are studying a motley assortment of simpler animal relatives. The commonalities they’re unearthing offer a trove of clues about our mutual ...

Birds are the most diverse land vertebrate on the planet, and now scientists have constructed a complete evolutionary tree of the 11,000 or so known species. This data came from hundreds of studies ...

The story of primates is a tale of incredible variety and ancient roots, told through the lens of science, DNA, and time itself. These creatures, ranging from massive gorillas to tiny mouse lemurs, ...