An artist's illustration of a Fast Radio Burst (FRB) reaching Earth. (Credit: Jingchuan Yu, Beijing Planetarium) Astronomers recently received another cryptic “hello” from the other side — of the universe that is. Nearly a decade ago, scientists detected a strange and powerful radio signal bursting from space, but they couldn't explain where it came from or what had caused it. Recently, astronomers once again discovered another mysterious radio signal, or so-called Fast Radio Burst (FRB), but this time, the signal revealed clues about its origin.