The only light in ocean depths "is the light we bring with us," says Jonathan Howland, an engineer at Woods Hole Oceanographic Institution. These arrays of LEDs, or light-emitting diodes, are attached to the hull of the new deep-diving vehicle Nereus, providing illumination for Nereus's camera system. (Photo by Tom Kleindinst, Woods Hole Oceanographic Institution) Read this article »« previous | main | next » | 
