http://www.newsweek.com/cosmic-heartbeat-radio-signal-frb-20191221a-1724684

Astronomers have detected a radio signal from deep space that repeated in a pattern so regular that it's been described as "like a heartbeat"—and they're not sure what caused it.

The signal, known as a fast radio burst (FRB), was detected by researchers using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope in December 2019.