Ask HN: Intellectual entertainment that's also not demanding?

After coming home from my Dilbertesque day job each day, I've found the ultimate antidote is to find something really inspiring from an intellectual point of view in which to engage myself in.

The problem however is that I'm usually mentally spent by the end of the day. I don't have the energy to sit down and read "The Origin of Species". So it has to be something that's, ironically, also not mentally demanding.

Does anyone have suggestions for blogs/games/entertainment whatever that fulfills this criteria? Stuff like zoomable fractals or xkcd comics, for instance.

Just need some reminders that intelligent life can be found on Earth.