Researchers in Australia tickled the rodents every day for a month to see if it would improve their emotional well-being. By Yan Zhuang MELBOURNE, Australia — It’s generally not a good time to be a ...

Living with little to no physical contact during the pandemic has reminded many of us of just how much we need it. As it turns out, another member of the animal kingdom — one most fondly known to ...

Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Puppies tussle in the annual Puppy Bowl.

Puppies tussle in the annual Puppy Bowl. Kids start a game of tag in a schoolyard. Play has been observed and documented in many species — and not just in mammals. However, according to Dr. Michael ...