In the new experiment, roosters made fewer alarm calls, meant to warn peers of predators, when placed in front a mirror versus when standing near another rooster. Stefano Spaziani / picture alliance ...

Jack Beresford is a Newsweek Senior Internet Culture & Trends Reporter, based in London, UK. His focus is reporting on trending topics on the Internet, he covers viral stories from around the world on ...

It's the idea that when cats see their reflections in a mirror that they don't recognize themselves and instead think they're ...

Infinite mirrors are a fun party trick, but the physics behind this phenomenon explains why it may not be true. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

When scientists want to determine if an animal is self-aware, they conduct what is known as a “mirror self-recognition test,” in which researchers expose animals to their own reflection, and see if ...

Jack Beresford is a Newsweek Senior Internet Culture & Trends Reporter, based in London, UK. His focus is reporting on trending topics on the Internet, he covers viral stories from around the world on ...

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 ...