xkcd: Too Old For This Shit

author

Randall Munroe

license

CC BY-NC 2.5

path on GitHub

https://github.com/davepinch/pinchy.cc/blob/master/content/sites/xkcd.com/447.md

random

Messier 43

tags

xkcd

website

https://xkcd.com/447/

xkcd of

mathematics