A tabletop gravitational wave detector based around a piece of ringing quartz has recorded two mysterious signals in its first 153 days of operation.
It's unclear exactly what these signals are; they could be from a number of phenomena. But one of those phenomena is exactly what the detector is designed to pick up – high-frequency gravitational waves, which have never been recorded before.
It's way too soon to come to any conclusions, but the next iteration of the detector will be able to narrow down what caused the quartz to resonate.
To read more, click here.