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(PhysOrg.com) -- A team of physicists from the Joint Quantum Institute (JQI), the Neils Bohr Institute in Copenhagen, Denmark, and Harvard University has developed a theory describing how to both detect weak electrical signals and cool electrical circuits using light and something very like a nanosized loudspeaker.

On an ordinary afternoon at Copenhagen Central Station, a performer sets up a drum in the center of a large hall. A cellist joins him

More than half the people on Earth now live in cities, so they'll be where we have to face our changing weather patterns. The most prepared cities are finding ways to keep citizens safe--and make them money. Even if you haven't been paying attention to the seemingly nonstop stream of wacky weather recently, chances are that your local government has.

Modern humans have, up until this point, done a pretty horrible job of cutting down on the amount of greenhouse gases that are released into the atmopshere to stave off climate change. As we inch ever closer to the tipping point where reducing emissions won't make a difference, some scientists are suggesting that we try to "geoengineer" the planet to counteract our emissions with everything from algae-lined buildings and forests of synthetic trees to ships that spray climate-altering clouds into the sky. These are ideas fit for a big-budget Hollywood movie (and they may even work).