The D20, or twenty-sided die, is most commonly known in the shape of a regular icosahedron. It’s a fantastic, enchanting geometry, and one that has held the balance of fate in innumerable tab… ...

The Metropolitan Museum of Art owns what may be the world's oldest d20 die. It's made out of serpentine and looks to be in remarkably good shape for its age. Watch this: ...

May 16, 2016 A.D.: Hermès made a d20 and Nerd Culture Is Finally Cool. ... the icosahedron is one of the 5 simple shapes that Plato described in Timaeus (360 BC).

The D20 Staff of Critical Hits is a “high-quality“, modular, collectable staff that will save you from “Nat 1’s! Forged in glass-infused polypropylene & DM tears” .