Can Humans Harvest The Sun's Energy Directly Like Plants?
http://www.greenmedinfo.com/blog/can-humans-photosynthesize-1?page=1
"Much like photosynthesis in plants, can human beings utilize light and water for their energy needs? New evidence suggests that it may be happening right now in each cell of your body."
Fascinating article! Radiant receptors include the pigment melanin (both in the eye and in the rest of the body) along with the body's ample water. One of the most intriguing points to me was that sunlight polarizes water into positive and negative energies (yin/yang?), which both initiates flow and also makes it capable of acting as a storage battery!
(Feels like I'm not doing this article justice, but maybe some other DBs will chime in.)