Another fan of xkcd. I'm a biology and neuroscience professor during my day job and have an interest in CS, math, engineering, and physics; although, I regret knowing less than I wish I did about these latter topics.
It seems you are using noscript, which is stopping our project wonderful ads from working. Explain xkcd uses ads to pay for bandwidth, and we manually approve all our advertisers, and our ads are restricted to unobtrusive images and slow animated GIFs. If you found this site helpful, please consider whitelisting us.