Eating grass–sounds simple, right? But behind this everyday process lies a highly specialized system in many hoofed animals ...

Scientists have determined that the way an animal rests—reclining on its back, sprawling on its belly, standing up, or sitting, is determined by primarily by its size. But more importantly, the study ...

The tough little egg made it all the way through the digestive system of a coscoroba swan like this one. TonyBaggett / iStock Killifish eggs are known for their resilience: They’ve been found thriving ...

"While these birds can look healthy on the outside, they're not doing well on the inside." "While these birds can look healthy on the outside, they're not doing well on the inside," Dr. Alex Bond, who ...