@starkatt Which bit? I'm curious. (I have read the book if you need to spoiler-tag it for others.)
The Three-Body Problem (book)
@emanate the cosmic microwave background flickering out Morse code.
re: The Three-Body Problem (book)
That said, I think they mention a thing like that and then /later/ give you an explanation that is... equally rediculous but sorta makes sense in the whole context of the story. :-}