Ever since Facebook launched in 2004, it has been used to help people stay connected with friends and family. The average Facebook user may have have hundreds or thousands of friends on Facebook, but only a small number of those friends can be counted on during tough times — according to a study by Oxford University psychology professor Robin Dunbar. Dunbar is also known for coming up with Dunbar’s number, which theorizes that people can maintain only about 150 stable relationships.

from Forbes – Tech http://ift.tt/1Vx3ZyQ
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