LIGO labs
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New detection of gravitational waves

Scientists have collected a second burst of gravitational waves sweeping through the Earth.

The warping of space-time was sensed on Christmas Day in the US at the Advanced LIGO laboratories - the same facilities that made the historic first detection in September last year.

Back then, the waves came from two huge inspiralling black holes.

This new set of waves, likewise, is ascribed to a black hole merger - but a smaller one.

LIGO collaboration scientist Prof Sheila Rowan from Glasgow University has been speaking to our correspondent Jonathan Amos.