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Some physicists still doubt whether LIGO has seen gravitational waves

By Michael Brooks

Aerial view of LIGO's Livingston detector

LIGO’s detectors, including this one in Livingston, Louisiana, must separate gravitational wave signals from natural seismic vibrations

Caltech/MIT/LIGO Lab

The Nobel prizewinning LIGO collaboration has published a paper describing in more detail than ever before how it analyses gravitational wave signals, partly in response to an investigation by New Scientist. But some physicists still say LIGO’s work contains errors.

Almost no one doubts that gravitational waves exist. They are a prediction of general relativity, a highly successful physics theory. When the Laser Interferometer Gravitational-Wave Observatory (LIGO) first announced it had detected one in 2016 it was cause for celebration …

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