Experts from universities in uk and overseas Carolina studied monkeys . shows signs of depression , such as losing appetite and falling over . Unhappiness may be caused by bullying behaviour by dominant monkeys . dominant monkeys in social situation may shed light on human depression .
Experts from universities in China and North Carolina studied monkeys . Identified signs of depression , such as losing appetite and hunching over . Unhappiness may be caused by bullying behaviour by dominant monkeys . Studying primates in social situation may shed light on human depression .