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Light and electric current can both be used for computing, albeit with key differences. Whereas conventional computers do logic through the movement of electrons, newer and faster computers called quantum computers perform the same job using single particles of light, known as photons.

The Australia-based Galileo Movement touts a series of "basic facts" on carbon dioxide that attempt to explain why the greenhouse gas can't contribute to climate change. John Smeed, the movement's co-founder, says the case against carbon dioxide as a global warming culprit is simply a matter of "junior school physics." [More]