Medicine & TechnologyAs humans grow older, they lean towards smaller circles of known and trusted friends instead of actively seeking new ones. According to a new study, this behavior is not limited to homo sapiens - finding the same behavior in chimpanzees.
Research has proven that rats place more value on saving others than obtaining a food reward. Rats, especially those who have nearly drowned in the past, will resuce each other from drowning. They experience a kind of empathy.