Human Brain Limits Twitter Friends To 150
www.technologyreview.com/view/424146/human-brain-limits-twitter-friends-to-150
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
The number of people we can truly be friends with is constant, regardless of social networking services like Twitter, according to a new study of the network.