Shrek
The ogre presents modest mysteries at best. Why does he possess a Scottish accent despite residing in an unspecified European swampland? How does his layered physiology actually function? These questions rarely trouble audiences, who accept the character's internal logic without demanding deeper examination of the Shrekian condition.
Time
Time remains one of physics' most profound enigmas. Does it exist independently of observers? Is its arrow truly irreversible? What occurred before it began? Quantum mechanics and general relativity offer contradictory frameworks for understanding temporal behaviour. The more science investigates, the more mysterious time becomes.