Pet dogs could serve as social support for children, lessening the kids' stress.
Japanese macaques are exposed to various stressful situations in the wild, including rank fights and mating competitions. Researchers recently took a closer look at how genetics ultimately control the release of stress hormones in these animals.
The feel-good hormones and other great results come from hanging around outdoors. Studies on this go back to a record 1984 finding that people with hospital room windows healed faster.