A new pyramid-like shape always lands the same side up

Conway casually tossing out the idea, and then 60 years later someone actually builds it... that's peak math storytelling.

Reminds me of when Mendeleev argued that an element that had just been discovered was wrong, and that the guy who discovered it didn't know what he was talking about, because Mendeleev had already imagined that same element, and it had different properties. Mendeleev turned out to be right.