Friends make hills seem less steep:
And not just in a metaphorical sense. In a fascinating study published in the Journal of Experimental Social Psychology, participants estimated a hill to be less steep when they were accompanied by a friend than when they were alone. What’s more, the longer the friends knew each other, the less steep the incline seemed.
Friends make you look more attractive
A small study from the University of California, San Diego, suggests that the cheerleader effect—the idea that you look more attractive in a group than you do alone—might be true. When researchers asked 139 college students to rank the general attractiveness of people in a group photo, then to rank one person from the group when shown his/her photo individually, the individual photos were ranked 5.5 percent less attractive.
Buddies help you battle cancer:
In a 2005 study published in the journal Cancer, women with ovarian cancer who had adequate social support (read: a lot of friends) had an average of 70 percent less interleukin-6, a blood protein that can reduce the effectiveness of chemotherapy, than patients with fewer friends.