A UC Berkeley researcher uses a magnifying glass to focus sunlight onto a small plastic boat. Nanotubes at one end of the boat absorb the sun’s heat, propelling the boat through the water. The second video shows a rotor that works on the same principle. A similar design could be used to make simple solar-powered pumps.
Seward Rutkove explains how a technique called electrical impedance myography (EIM) can be used to measure the health of muscles. He demonstrates a handheld device that can now perform EIM measurements much more quickly than before.
Massachusetts Institute of Technology