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The amazing sounds that LIGO expects to hear as it detects more gravitational waves in space. LIGO’s lead engineer Vern Sandberg shows the Â鶹Éç’s Aleem Maqbool how two black holes colliding or the death spirals of two neutron stars will be recognised as the detector seeks out more dramatic events in our universe (Image credit: Artist’s impression of two black holes colliding © Nasa)