Sometimes, it's good to hold a mirror up to yourself. But that's probably not the best advice for Simba, the feline star of an Instagram video that has recently gone viral. Simba was just born in ...

A dog by the name of Harley has shown herself to be one smart puppy after seemingly deducing that she is looking at her own reflection in the mirror. In a video posted to TikTok under the handle ...

Daniel Povinelli was in high school when he first read about a clever experiment, published in 1970, that showed chimpanzees—but not monkeys--can recognize themselves in mirrors. "I bought into the ...