Need another way to think about gravitational waves? PhD Comics has it in cosmologist-approved comic format.

Gravitational waves & inflation in comic-form

(Why am I just teasing you with it here? Because content-creators own their work, but this is cool enough to bring to your attention. So, go clicky-clicky & check it out.)

Need more context? We've also got the human-interest aspect of the story, and already showed you the towel-analogy for this discovery.