370 reactions · 59 shares |  Behind the scenes | Journey through the crash testing process with one of the stars of the show – a Hybrid III frontal crash test dummy. Marvin Hatchett, Manager of our Dummy Calibration Lab, gives an overview of the steps these impressive tools go through during a typical day of frontal testing. | Insurance Institute for Highway Safety | Facebook

For most of history, human progress was slow and life was more or less the same from generation to generation. But over the last thousand years, we’ve seen giant shifts in basically everything! Study Hall’s new Modern World History series will explore the catalyst events, from imperialism to iPhones, that led to the global society we are today. New episodes every Thursday on the @GoStudyHall channel! | CrashCourse