Grist: Once known primarily as the home of tornados and the Hanson brothers, Oklahoma has a new claim to fame: earthquakes! Weve told you about the states frightening trend before, but now its hit a new milestone: EcoWatch reports that Oklahoma has experienced 40 earthquakes in the past seven days. Just yesterday, five quakes measuring over 4.0 magnitude were felt in Oklahoma and surrounding states, which would seem shocking but the rate of earthquakes has increased so dramatically in recent years that...