Yeemps are a form of high-speed hypersphere (the four-dimensional member of the progression circle -> sphere -> hypersphere ). They pass through most matter, but bounce off certain waveform-patterns. The velocity of a yeemp is constant, like that of a photon, (although significantly lower). The standing wave that best contains a yeemp is that formed by a perfect or near-perfect tesseract, although some other formations occasionally have sufficient opacity to bounce one.

{YeempBBS main}