I follow loads of interesting folks on Twitter–don’t you? Most post about weather, oddities in the news, or just complain (boy, I see a lot of those coming from Hollywood types), but today’s Matt Drudge post leaves one wondering if he knows something we don’t. https://twitter.com/DRUDGE/status/426733669022040064 Have an exit plan
Beginning in the early 1990s, people living in Philadelphia began noticing rectangular signs embedded in the asphalt of city streets.
Over the years, more and more tiles were discovered, and not all are in Philly. In fact, there are hundreds, stretching across the US as far west as Kansas City and even one in South America (Chile)!