Have you ever wondered what was behind the loudest sound on Earth? To put things in perspective, a vacuum cleaner is around 70 decibels, a blender is about 90, and a live rock band will produce about 120. So what made a sound so loud it may have been almost 250 decibels?

Plus, you're being tracked. I reveal your phone's hidden list that knows everywhere you go. Matt's got slick tips on how to digitize your old address book. And if you're worried about staying safe in cyberspace, Allie's got three habits the pros know.