21 Photos - Dec 13, 2012
Photo: People talking about energyPhoto: The big ideaPhoto: Photo: Photo: TransportPhoto: PenguinPhoto: Captain & the seaPhoto: DarfsPhoto: MonksPhoto: Photo: Old telephone systemPhoto: LeserattePhoto: Photo: Photo: Photo: ReporterPhoto: Photo: Verhalten im LaborPhoto: cogwheelsPhoto: Camera ObscuraPhoto: Egyptian