Fast radio bursts (FRBs) are some of the universe’s strangest phenomena: powerful radio signals that flash from distant space for milliseconds and then disappear. They have been attributed to everything from black holes to extraterrestrial intelligence.Because they’re so brief, and because radio telescopes can only watch a small area of the sky at a time, only about 2 dozen FRBs have ever been detected. Of those, only one has been observed to repeat: FRB 121102, which resides in a dwarf galaxy about 3 3 billion light years away from Earth.
via We’ve just seen 15 new mysterious cosmic radio bursts from space | New Scientist.