Baby hippos, also known as calves, are adorable and exhibit fascinating behaviors, including yawning. When baby hippos yawn, it’s not just a sign of sleepiness. Yawning in hippos is often associated ...

Yawning question Young children don't find yawning contagious, according to a new British study. James Anderson and Ailsa Millen from the University of Stirling report in the journal Biology Letters ...

Johanna Simkin does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...