Designers recreate stone age tools with space age technology

For more than a million years, the simple stone hand axe was one of our most important tools, but in the age of smartphones and virtual reality it can be hard to understand how revolutionary it really was. In their design series "Man Made," Dov Ganchrow and Ami Drach use 3D printing to make the tool's importance a little more clear. With help from Dr. Leore Grosman from the Institute of Archaeology at the Hebrew University of Jerusalem, the design duo started out by collecting rocks of just...