Powerful Radio Signal From Deep Space Appears to Be Repeating in a 16-Day Cycle

https://www.sciencealert.com/periodicity-has-been-detected-in-a-repeating-fast-radio-burst

This is another example of how little we know when it comes to the universe, but it also highlights that our knowledge and capability to understand is growing to the challenge. It will be interesting to see what the final explanation for this repeating signal is and how they deduce the origin.