The animal enthusiasts at ZooEarthTV capture the adorable moment a baby hippo opens a huge yawn.

European Tree Frog (Hyla arborea) yawning on a Bramble (Rubus sp.) bush in the forest in Noord Brabant in the Netherlands© Henk Bogaard/Shutterstock.com You know the feeling. It’s getting close to ...

In addition to its spontaneous form, yawning can also be contagious. Again, this happens in both humans and animals — and ...

Humans aren't alone when it comes to yawning — all vertebrates do it too, including fish, amphibians, reptiles, birds and mammals. But why? The "evolutionarily ancient" act of yawning likely serves a ...

Chimpanzees (Pan troglodytes) can ‘catch’ yawns from an android imitating human facial expressions, according to new research from City St George’s, University of London. The study, published in ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...