narrator: conrad shawcross' breathtaking curiosity shows no sign of waning. f physics, metaphysics, language, and metaphor, his works chisel away at the certainty of knowledge and our assumptions about the world around us. >> conrad is using the materials of our age at his disposal to create fantastic questions. but there is never an answer with his work, is always a question. >> you have these wonderful, unique movements. it is like stumbling across something for the first time. that moment of realization is great. >> i don't know how conrad does it. i'm not sure how he manages such enormous projects, public commissions, orchestrating at the same time. i think it's a very exciting .ime to see ♪ >> welcome to "bloomberg businessweek." coming up in the cover story, the behind-the-scenes battle over silver energy. in one quarter, elon musk. in the other, warren buffett. the details of this clash of the titans. also, we need chris coxe and taliban is facebook -- and tell you why he is facebook's secret weapon as an alternative to the like button. we will look at