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Insights about time’s arrow from a liquid crystal universe.

What insights can an LCD display give us about time’s arrow?

City blocks help illustrate why walking randomly tends to take you away from your starting point.

Why is it that when you walk randomly, the more you walk, the farther you get from your starting point?

What can the mathematical genius Srinivasa Ramanujan teach us about number theory through mathematical structures involving infinity?

Insights from the mathematical genius Srinivasa Ramanujan give us a number of ways to explore the infinite.

Hilbert’s Hotel, an incredibly thin triangle and an elliptical pool table help us test the concept of infinity in the physical world.

Three puzzles test whether the concept of infinity has purchase in the physical world.

Try these shortcuts for solving problems that seem to require a lengthy calculation.