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This Concept Map, created with IHMC CmapTools, has information related to: CmapTools - Building a Concept Map, Procedures 4 Begin Cmap with 1-4 Most General Concepts, Procedures 6 Continue building concept hierarchy, Choose Explicit Linking Words to Relat

"In 1975, a new word came into use, when a maverick mathematician made an important discovery. So what are fractals? And why are they important? "

At age 14, in poverty and famine, a Malawian boy built a windmill to power his family's home. Now at 22, William Kamkwamba, who speaks at TED, here, for the second time, shares in his own words the moving tale of invention that changed his life.