Proof of Einstein’s theory of ripples arrives in a chirp

Detection of gravitational waves caused by collision of black holes hailed as astronomical milestone

By Sarah Knapton SCIENCE EDITOR in Washington

MORE than one billion years ago a colossal storm raged in the universe as two huge black holes collided and merged. The impact was so powerful that it shook not only space but also time, sending a ripple through the very fabric of the universe with 50...

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