Engineering and Technology

Bike builder David Folch builds supersized bikes for supersized riders.

Compare the brightness of two light sources with an oil spot on a white card.

Observe STEM-rich, equity-oriented tinkering for young people in Watsonville, California.

British artist Tim Hunkin discusses his whimsical Tinkerer's Clock.

Light an LED with five cents.

Surprisingly, a flat panel rolls smoothly on non-circular rollers.

Listen to the sound of rain falling—anytime, anywhere.

Listen to the rhythm of falling weights.

The Doppler effect causes the “neeeeeoowwm” sound of cars.

See how differently shaped ears affect your hearing.

Build a cuíca—a musical instrument—and play with vibrations!

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