Philosophy
The Metaphysics of Time and the Reality of the Present Moment
Quick fact
Presentism holds that only the present moment exists, whereas eternalism—the view supported by many physicists and philosophers—treats all times, past, present, and future, as equally real, making the present no more special than a particular location in space.
Why this is interesting
You've likely felt that the present moment is real, while the past is gone and the future hasn't arrived—but what if that's just an illusion? Philosophers have long debated whether the present actually exists in a way that the past and future don't.