New Shapes Solve Infinite Pool Table Problem

Strike a billiard ball on a frictionless table with no pockets so that it never stops bouncing off the table walls. If you returned years later, what would you find? Would the ball have settled into some repeating orbit, like a planet circling the sun, or would it be continually tracing new paths in a ceaseless exploration of its felt-covered plane?

https://www.quantamagazine.org/new-shapes-solve-infinite-pool-table-problem-20170808/?utm_content=buffer53844&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer