Pioneering observations made by researchers from Academia Sinica in Taiwan, Carnegie Mellon University and the University of Toronto with the National Science Foundation's giant Robert C. Byrd Green Bank Telescope (GBT) have validated a new tool for mapping large cosmic structures. Observations made using the method, called intensity mapping, promise to provide valuable clues about the nature of the mysterious "dark energy" believed to constitute nearly three-fourths of the mass and energy of the universe. The findings will be published in the July 22 issue of Nature.

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