Juan Enriquez offers a glimpse of some ground-breaking research to explore the potential of bioenergy. Our current energy sources -- coal, oil, gas -- are ultimately derived from ancient plants -- they're "concentrated sunlight." He asks, Can we learn from that process and accelerate it? Can we get to the point where we grow our own energy as efficiently as we grow wheat? (Less than a month after this talk, his company announced a process to do just that.) From a recent TEDtalk.