This xkcd.com update introduces a variety of new reading modes which can be activated through the menu.

"While I try to do my part to destroy the environment, I try not to focus too much on individual responsibility. By pushing for broad policy changes, we can collectively do far more damage to the biosphere than any of us could on our own."

We're working to make sure the images are as up-to-date and accurate as possible, with a minimum number of sponsored galaxies.

Yes, the cosmic microwave background is great, but what about the earthly microwave foreground?

Depending what corners of the internet you hang out on, 'regular' may at times awkwardly coexist with 'sexy.'

It's ok, I still have some nice, cool gas clouds that aren't collapsing. As long as nothing ionizes them, I can continue to enjoy their ... HEY! NO!!!