A New Pyramid-Like Shape Always Lands the Same Side Up

A simple geometric shape has kept mathematicians puzzled for decades. Now, researchers have finally created a tetrahedron that always lands on the same side, confirming a conjecture by the late John Conway.

This four-faced solid, made of carbon fiber and tungsten carbide, weighs just 120 grams but required incredible precision to construct. The team had to distribute its weight so carefully that even a tiny glob of glue could throw off the balance.

"Seeing the lines on the computer is very far from reality," said Dávid Almádi, a former architecture student who helped design the shape. "That we designed it, and it works, it's kind of fantastic."

While the practical applications are still unclear, this breakthrough could inspire new questions about polyhedra and even influence the design of self-righting spacecraft. It's a reminder that even in mathematics, sometimes you need to see it to believe it.