A large block of Aluminum has a perfect cylindrical hole of diameter 3 meters. On top of the hole sits a perfect, solid glass sphere of diameter 3.05 meters. Your job is to get the glass sphere to traverse the hole in the block.
Oh yeah, when you are done, the block and sphere are indistinguishable (macroscopically and microscopically) from their condition before you started.
Is this possible?
The glass could fit through the hole with extreme temperature changes for both objects.