Dr Jen Martin

First: check how many friends you have on Facebook. Next: ask yourself how many of them you consider to be ‘real’ friends? According to Dunbar’s number, we can only maintain about 150 meaningful relationships at one time. And you can probably count your closest friends on one hand. Your social brain Robin Dunbar has spent nearly 50 years studying primates. Back in the 90s, he looked at the relationship between group size and brain size […]