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Ligo Detects Whispers of Another Black-Hole Merger

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Merger of two black holes, artist's rendering

An artist's illustration of the merger of two black holes (centre) causing gravitational waves to spiral out from the collision.

Credit: Russell Knightley/Science Photo Library

Just before 4 a.m. on 26 December, B. S. Sathyaprakash woke up to some good news: gravitational waves had been detected for only the second time in history.

From Nature
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