Health drink, shredded sweet, woven mat, biofuel is there anything a coconut can't become? Humans have used this versatile palm-tree nut" for half a million years, by one estimate. Even so, coconuts remain refreshingly cutting edge. Take their appeal as an energy source. This year. Tokelau, a trio of South Pacific atol aims to generate all of the power with solar energy and coconut oil It joins other coconut-rich places ncluding Papua New Guinea, the Philippines, and Vanuatu that have blended or modified coconut oil to run things like ships, trucks, and official vehicles. On the health front, electrolyte-packed coconut water has been making waves in the U of and Brazil where packed consumption doubled from 20o5 to 2010. Call it an upscale version hydrating drink long employed straight from the shell