A New Pyramid-Like Shape Always Lands the Same Side Up
https://www.quantamagazine.org/a-new-pyramid-like-shape-always-lands-the-same-side-up-20250625
https://news.ycombinator.com/item?id=44381297
* tetrahedron: simplest Platonic solid
* mathematicians made one that’s stable only on one side
* confirms decades-old conjecture
https://en.wikipedia.org/wiki/Platonic_solid
#math #polyhedra #tetrahedron #balance #JohnConway #PlatonicSolids



