Vertically rolling ball 'challenges our basic understanding of physics'

Breakthroughs, discoveries, and DIY tips sent every weekday. Gravity seems like a predictable, even mundane, aspect of existence. The physics dictating one of the universe's four fundamental forces is relatively straightforward to understand and calculate (most of the time, at least). Even so, the relationships between objects with mass and energy continues to surprise physical engineers. Take recent observations made by a team at the University of Waterloo, for example.