Octagonally tetrablended truncated tesseract - Polytope Wiki
tesseract - Wiktionary, the free dictionary
Tesseract - Wikipedia
Looping Animated Projection of a Rotating Tesseract [Jason Hise at English Wikipedia] - YouTube
TIL the Tesseract, or Hypercube, isn't the only 4 dimensional shape, and there are 5 others recognized as Regular, including one with 600 corners. : r/todayilearned