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benizi
<p>Of course (hence 'featured', not 'introduced'). I'm guessing XKCD was not around in 1891. That's why I linked Wikipedia first. More info at the following excellent sites: [http://mathworld.wolfram.com/HilbertCurve.html|Hilbert Curve at Mathworld] and [http://planetmath.org/encyclopedia/PeanoCurve.html|Peano Curve (more general) at PlanetMath].</p>
<p><b>Update:</b> Oops. Just looked at your profile, which states that you hate xkcd and wikipedia. Sorry for the salt in the wound.</p>
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