Eight-billion-year journey for energy blast

When the Universe was around half the age it is today, a blast of fast radio waves — maybe caused by the collision of several galaxies — shot out into the void. Some eight billion years later, in 2022, astronomers detected it on Earth. The unusual reading is older and more powerful than we thought fast radio waves could be, and might lead to a better understanding of the parts of the Universe that are currently invisible to our telescopes.