Take a weeble, run it through a Minecraft filter, build it almost entirely of open air, and what have you got? It’s called a Bille, and as a monostable tetrahedron – that is, a four-sided shape that will always come to rest on the same side,…
Meet The Bille, The Self-Righting Tetrahedron That Could Help To Stop Lunar Landers From Tipping Over
