Reuters Pictures
Britain's Prince Charles (2R) gestures as he stands with Brandenburg's state Science Minister Johanna Wanka (R) and John Schellnhuber, head of Potsdam Institute for Climate Impact Research with son Zoltan and wife Margret Boysen-Schellnhuber, in front of the Michaelsenhaus in the Albert Einstein Science Park during a visit to Potsdam, April 30, 2009.