Normally I don't upvote XKCD submissions, because I figure pretty much everyone here on HN would read them.<p>Ironic, given today's comic.<p>I love it when there's something cool that I met years or decades ago and which I get to share with someone who hasn't seen it. I love it when I get to see this cool thing afresh, through someone else's eyes, and get the sense of wonder and excitement all over again.<p>I give talks to schools, and people ask if I ever get bored. Sometimes, yes, because sometimes the kids just don't "get it", and on those occasions we end up trudging through the material.<p>But when they do "get it", I get to share the excitement of discovery all over again.<p>And now Munroe has reminded me of that.