Twinkles in the Dark

Astronomers may have finally detected the invisible matter that will control the fate of the universe

The last thing physicist Kim Griest expected was to find what he was looking for. Griest and colleagues at the University of California, Berkeley had been scanning the skies for more than a year in search of the mysterious and elusive material called dark matter. The scientists couldn't see it and couldn't say what it was, but they knew it was out there because of its undeniable effect on stars and planets. What could the invisible stuff be made of? The Berkeley group was checking out a theory that dark matter takes the form of large planets or small, dim stars...

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