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New maps of the cosmic dark

Probing galactic distortions reveals web of invisible matter

1:02pm, January 10, 2012

AUSTIN, Texas — Astronomers might not know what dark matter is or be able to see it, but at least they know something about where it is. Using telltale distortions in light from distant galaxies, scientists have mapped out clumps and strings of the invisible stuff on a larger scale than ever before.

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