Ten amazing (and occasionally explosive) chemical reactions, caught on video

It's fun to watch chemistry labs explode on video, but you know what's even more fun? Watching a chemistry experiment in action, with a good explanation of what's going on. That's science at its most awesome. Here are ten of our favorite chemical reactions caught on video — which also include excellent commentary on… » 2/20/12 10:53am 2/20/12 10:53am

Saltwater and sludge could give us an inexhaustible supply of energy

Splitting water into hydrogen and oxygen is generally considered a fantastic way to get a renewable power source. The problem is how exactly you go about splitting the water. Current methods require some power input in order to kickstart the reaction, reducing its effectiveness as a sustainable power source, since… » 9/23/11 6:40am 9/23/11 6:40am

The lights in the universe are going out. Now astronomers think they know why.

The universe just isn't what it used to be. Billions of years ago, when the universe was still in its infancy, the casual observer would have seen stars forming all around him, and at a pretty rapid clip. In recent years, however (i.e. the last few billion), the rate of star formation has slowed to a fraction of its… » 8/23/11 12:00pm 8/23/11 12:00pm

The Future of Solar Power In a Glass of Water

Oxygen and hydrogen are both excellent energy sources, and we've got tons of both on Earth. Unfortunately, that energy is mostly tied up in water molecules that require still more energy to split apart. But what if you could split water molecules with a modest electric current, under conditions you can duplicate on… » 8/01/08 8:00am 8/01/08 8:00am