Backing Up History

The stone giants called moai have kept watch—and secrets—on Easter Island for centuries. Now preservationists have found a way to learn more about them. In 2007, six workers who’d partnered with the nonprofit CyArk arrived on the island with a 3-D laser scanner and other surveying equipment. They made high-resolution scans of carvings and caves, producing a data set so accurate they call it “reality capture.” Read more here.