It took 13 years for LIGO to detect the first gravitational waves. The upgraded LIGO has just detected two likely gravitational signals from colliding black holes in the past *two weeks*. https://t.co/2T5FaT6r2P pic.twitter.com/2JKaefzcpl
— Corey S. Powell (@coreyspowell) April 14, 2019
via Twitter https://twitter.com/coreyspowell
April 14, 2019 at 10:06PM
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