Grow spikes of crystals in the sun.
Watch tiny blue, green, and white molds grow on leftover food.
Watch old pennies turn bright and shiny right before your eyes!
What does it take to block gamma radiation?
Here's how you can model the use of X rays for medical examinations with some sand and a piece of screen.
Study ultraviolet radiation from the sun and other sources using UV beads.
A flash of light prints a lingering image in your eye.
Two cylinders that look the same may roll down a hill at different rates.
"Cold" metal and "warm" wood may be the same temperature.
The world's simplest Cartesian diver.
Make an object sink or float with a simple squeeze.
What happens when you get off the merry-go-round?
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© 2014 Exploratorium
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