Mental Floss EIC Erin McCarthy on the title's 20-year mission to make readers smarter

This week Mental Floss editor in chief Erin McCarthy tells us about how its celebrating its 20th anniversary, how the magazine started in a university dorm room, its mission to help people feel smarter and how the team decides what to cover. In the news roundup the team discuss a good week for a business-savvy Twitter, a bad week for Facebook and Snapchat, and the worst few years of all time for Yahoo & AOL. Peter has emails older than Esther.