This is by far my favourite podcast to relax to. They're usually funny, I learn completely nonsensical, but factual, trivia and it's well edited so there are no bits where they yammer on about something.

There's also a HUGE backlog of stuff you can listen to (Currently at episode 457) and each episode has 4 facts, you can pause between each if stopping in the middle feels as wrong to you as it does to me.

They do contain a few running jokes, so listening in order is suggested but not mandatory.