Physics
Metaphysics
Quick fact
The word 'metaphysics' comes from Aristotle's works placed 'after physics' (meta ta physika), but it actually deals with questions that come before physics—about the nature of reality itself.
Why this is interesting
You know the world exists because you see, touch, and feel it. But what does it actually mean for something to 'exist'? And what is the world really made of—at its most fundamental level? These questions are the heart of metaphysics.