Woody Norris invents amazing things. Christopher deCharms looks inside the brain. Alan Russell on regenerating our bodies. Anthony Atala on growing new organs. Hans Rosling's new insights on poverty. Jennifer Lin improvs piano magic. Sirena Huang dazzles on violin. Blaise Aguera y Arcas demos Photosynth. Pranav Mistry: The thrilling potential of SixthSense technology.