A second repetitive radio emerges from the depths of space

A second repetitive radio emerges from the depths of space

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Lightning line, with a sharp peak, from a galaxy to telescopes on Earth, not to scale

Artistic concept of a fast radio burst from a distant galaxy. Picture via Danielle Futselaar.

Fast Radio Bursts (FRBs) are one of the most puzzling astrophysical discoveries of recent years. They are strong but brief impulses from radio waves that seem to come from galaxies billions of light-years away. Scientists do not yet know what causes them, but they are finding more and more clues as they continue to investigate. One oddity was that of more than 60 FRBs found so far, of which only one was repeated from the same source – until now.