BBC: Mystery cosmic radio bursts pinpointed ... more than three billion light-years away

Mystery cosmic radio bursts pinpointed - BBC News

From the section Science & Environment They're one of the most persistent puzzles in modern astronomy. As the name suggests, Fast Radio Bursts (FRBs) are short-lived - but powerful - pulses of radio waves from the cosmos. Their brevity, combined with the fact that it's difficult to pinpoint their location, have ensured their origins remain enigmatic.

bbc.com