In string theory, physicists tell us that the subatomic particles that make up our universe are created within ten spatial dimensions (plus an eleventh dimension of "time") by the vibrations of exquisitely small "superstrings". The average person has barely gotten used to the idea of there being four dimensions: how can we possibly imagine the tenth?

The countries of the European Union are currently the global leaders in the development and application of renewable energy. Promoting the use of renewable energy sources is important both to the reduction of the EU's dependence on foreign energy imports, and in meeting targets to combat global warming. Germany and the United Kingdom are currently the only members of the EU that are on track to achieve the objectives set by the Kyoto Protocol on climate change.