Sudden bleeding in the brain can cause a hemorrhagic stroke. The bleeding causes swelling of the brain and increased pressure in the skull. The swelling and pressure damage brain cells and tissues.
That means 651 million accounts â about four times the number of active Twitter users â have been registered and then been abandoned by their owners. Those 651 million accounts are Twitter's dark pool of users: the people who signed up and didn't like it. Their accounts continue to exist, unused, according to Twopcharts. We asked Twitter to tell us its total number of registered users, but the company declined to comment. Here's Twopcharts' data as of Nov. 5:
Twitter was created in March 2006 by Jack Dorsey, Evan Williams, Biz Stone and Noah Glass and launched by July 2006. The service rapidly gained worldwide popularity, with more than 100 million users who in 2012 posted 340 million tweets per day.