Meet The Bille, A Self-Righting Tetrahedron That Nobody Was Sure Could Exist
IFLScience   2 days ago
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Meet The Bille, A Self-Righting Tetrahedron That Nobody Was Sure Could Exist  IFLScienceNew geometry discovery could stop lunar landers from falling over  Phys.orgThis Weird Pyramid Always Lands on the Same Face, Confirming 40-Year-Old...