Before you freak out, that 29% figure is not scientific. It’s from research conducted by the Washington Post’s Tom Herrera, who last summer counted all the posts his Facebook friends produced in a 24-hour period and cross-referenced them with what appeared in his News Feed. No one outside Facebook knows how the News Feed algorithm actually works, since gaming it is a multimillion-dollar industry. But the old Facebook, where you friended people and then saw everything they shared on a homepage, has been defunct since 2008. The new Facebook tracks your behavior on the site and customizes your News Feed to show you only what you really care about—in my case, baby pictures and articles about catcalling.