[ssalka]

Are there any known cosmological phenomena that would produce fast radio bursts? Even if not on a periodic basis; just at all?

Obviously it is a big leap to assume this is evidence of ETs, but do we have any plausible explanations – besides that one – for what could be causing this?

[morninglight]

This is the most plausible explanation that we could find:

https://www.youtube.com/watch?v=E7TIpSzymoY

.