Below the Edge of DarknessEdith Widder grew up wanting to become a marine biologist. But after complications from surgery caused her to go temporarily blind, she became fascinated by light, and her focus turned to bioluminescence. On her first visit to the deep ocean, she turned off the lights on her diving suit and witnessed breathtaking explosions of bioluminescent activity. Why was there so much light down there? Below the Edge of Darkness takes readers deep into the