Phys.org  August 12, 2023 The rolling paths of oloids, sphericons, polycons, platonicons and two-circle rollers are all sinusoid-like and their diversity ends there. To find out if a more general problem is solvable, an international team of researchers (South Korea, Switzerland) developed an algorithm to design such bodies (they called ‘trajectoids’) and validated these designs experimentally by three-dimensionally printing the computed shapes and tracking their rolling paths, including those that close onto themselves such that the body’s centre of mass moves intermittently uphill. According to the researchers the existence of trajectoids for most paths has unexpected implications for quantum and […]