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WHERE THE CLUMPS ARE
This composite image, roughly 2 billion light-years on each side, shows the distribution of dark matter in a simulated, 13.7-billion-year-old galaxy. The smaller-scale insets compare dark matter density in the outer (top) and inner (bottom) regions of the galaxy. Red indicates high density. Click on the image for full story. Credit: Diemand et. al, UC-Santa Cruz, The Institute of Advanced Study, Oak Ridge National Lab

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