Near the end of 1861, with the American Union crumbling, President Abraham Lincoln became obsessed with an unusual document. Nearly three feet in length, it appeared at first to be a map of the ...

This story was originally published by Data-Smart City Solutions. The Vision Zero initiative began in Sweden in 1997 with the goal of eliminating fatal traffic and pedestrian accidents, and has since ...

As they span significant areas of Asia, Europe and the Americas, karst landscapes cover some 15 percent of the Earth’s land mass. Scientists estimate that these areas of porous bedrock are home to as ...