The other day, someone found my blog from google.bg. Rather than think, "Oh, that’s Bulgarian Google. I know someone who is moving to Bulgaria," the first thought that I had was, "Hey, lowercase ‘bg’ has a rotational ambigram equivalent!" For those of you that are not typeface junkies and haven’t read Angels and Demons, an ambigram is a word that, when written down, has some symmetry. It can be mirror symmetry, like "MOM", where the left side is the mirror image of the right, or "BOID", where the top is the mirror image of the bottom. Or it can be rotational, where the word reads the same way if you rotate it 180º. What follows is all about rotational ambigrams.
So I challenged myself to figure out what the rotational ambigram of "bg" was without rotating a piece of paper. I’m rather disappointed to say that, although my brain had immediately recognized that there was one, I went though several guesses involving "p" and "d" before figuring it out. The answer, is, of course, "6q". And it still took me another hour to realize that "bg" is just a slight variation on the most famous numerical rotational ambigram of all. (more…)