In what likely is the first study on the evolution of dietary preferences across the animal kingdom, researchers report several unexpected discoveries, including that the first animal likely was a ...

What an animal eats is a fundamental aspect of its biology, but surprisingly, the evolution of diet had not been studied across the animal kingdom until now. Scientists at the University of Arizona ...

Little is known about Paleozoic creatures’ parental prowess. But a newly uncovered 300-million-year-old fossil might be the earliest evidence of a parent, well, acting like a parent. Researchers from ...