xkcd-com feeds.twtxt.net Mon, Jul 15 10:00AM 2024 (2y ago) Beam of Light ⌘ Read more ⤋ Read More Yarn
![Einstein's theories solved a longstanding mystery about Mercury: Why it gets so hot.](https://imgs.xkcd.com/comics/beam_of_light.png "Einstein's theories solved a longstanding mystery about Mercury: Why it gets so hot. \")
⌘ Read more ⌘ Read more