People Who Talk to Strangers Are Happier According to Science

People are the most sociable species in the world, a trait scientists believe to have helped us survive in an environment full of dangers. However, something interesting happens every morning while people go to work on their normal commute and board trains, buses, and trams. These means of transportation force people to sit close to one another. But more often than not, they just end up ignoring each other. How did we become so antisocial?