Mathematics

Randomly toss some toothpicks, with pi as your reward.

by Pearl Tesler • June 28, 2017

Cardboard gets its Amazonian strength from simple geometry.

What do plants know about numbers? Paul Dancstep investigates.

Pi Day isn't just a day—it's a way of life.

Explore graphing, angles, and storytelling by building a seesaw for your smartphone.

Turn your phone into a pocket science laboratory with tools to measure light, motion, sound, and more.

Find the height of a tree, paper rocket or North Star.

Ready for liftoff? Launch rockets with your own launcher!

Square wheels roll smoothly on a round road.

See how images appear in a curved mirror.

Explore some ways in which the democratic process can go wrong.

Relive our 27th annual Pi Day celebration (and Einstein's birthday).

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