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...