When it comes to friendships, people are known to become more selective with age. It turns out the same is true of male chimps, who have fewer yet more genuine pals to ape around with as they get older, according to a study published in the journal Science on Thursday.

We all have hear married people live happier over their lifetimes than single folks do. People tend to say they're more "satisfied" with life just after their weddings.But a report in Tech Insider asks if it is actually the act of marriage that's causing those benefits.