Find out what you think you know — and where you don't.
How a function that calls itself can solve a problem.
How two people can share a secret over a public channel securely.
Why websites don't (or shouldn't) store your actual password.
If a self-driving car's brakes fail, how should it decide who gets hurt?
Can a computer truly "understand" language, or is it just faking it?
If you replace every plank on a ship over time, is it still the same ship?
If the universe is vast and old, why haven't we seen any aliens?
If you could plug into a machine that simulates a perfect life, would you?
What if our entire universe is just a computer simulation run by a higher civilization?
How prices settle where what buyers want meets what sellers offer.
The unseen cost of what you give up when making a choice.
Why we keep investing time or money into a losing strategy just because we already started.
Why two rational people might choose to betray each other, even when cooperation is better.
Why do shared, unregulated resources always end up destroyed?
How plants turn light into the sugar that fuels them.
How species adapt to their environments over millions of years.
How neurons communicate using tiny electrical spikes.
Almost every cell in your body is replaced over years. What makes you biologically "you"?
The ethical dilemma of using immortal human cells taken without consent.
Why heavier things need more force to speed up the same amount.
Why a shattered glass never spontaneously reassembles itself.
Why time slows down for you the faster you move through space.
If you travel back in time and prevent your birth, how did you travel back in time?
Is the cat in the box dead or alive before you open it?
If one twin flies to a star and back, why are they younger than the twin on Earth?
Want to explain something else? A creative thought experiment or specific question? Try it here.