Today in 1883: The United States and Canada adopt a system of standard time zones: http://t.co/jcCDySfpWi— amhistorymuseum (@amhistorymuseum) November 18, 2013 Today in 1883 four standard time zones were introduced for the U.S. at the…

Portrait by Anthony Berger/Wikimedia Commons. Professor Christopher Oakley says he has spotted President Abraham Lincoln in a 150-year-old photograph of the crowd at the Gettysburg Address, a discovery that could be one of the most significant in recreating…

.embed-container { position: relative; padding-bottom: 2.25%; padding-top: 30px; height: 0; overflow: hidden; max-width: 100%; height: auto; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } On this day in 2011,…