Bioengineers at Duke Univesity in North Carolina have developed a laboratory prototype of a robot that can locate and surgically extract shrapnel pieces from flesh without any kind of human supervision. Using 3-D ultrasound imaging as “eyes”, the tabletop robot was able to precisely locate tiny shards of metal and then successfully guide a needle to their exact location.
Sandy beaches are a delight for swimmers, surfers, sailors, and people strolling down the boardwalk. A horde of beautiful shells and buried coins (not to mention the occasional dropped ring) awaits the skilled beachcomber. Beach sand also carries within it a variety of traces of the history of that beach. A prime example is the magnetic sands of Normandy.