Yanping Wang, of the Beijing Planetarium in Beijing, China, took this surprisingly gorgeous shot of sand at magnification, using reflected light. He took place in the Nikon Small World Photography Contest.
Vestibular hair cells of the Inner ear help divers (like the one in today's pic) know their up down orientation in water. Sounds under water are magnified. When we hear sounds (whether under water or above) microscopic hairs in our inner ears vibrate.