Crying is one of the most recognizable human emotional signals. Tears appear when people experience grief, relief, joy, or deep stress. Because this response is so familiar, observers often assume ...

Two lion brothers rubbing heads in sign of affection and bonding© RichartPhotos/Shutterstock.com Scientists have recorded same-sex behavior across many animal groups ...

Emotional tears are a uniquely human behavior. Research suggests they evolved not for eye health but as a powerful social ...

Polar bear encounters with humans are a regular concern for scientists and communities near polar bear habitats, but new research is showing the bears' reasons for coming in contact with humans might ...

Scientists studying 1,300 golden retrievers have uncovered genetic clues explaining why some dogs are more anxious, energetic, or aggressive than others. Remarkably, several of the same genes linked ...