In this simulation game, teams of predators equipped with genetically different “mouths” hunt for “prey.” Over time, the fittest among the predators and prey dominate the population, modeling the process of natural selection.
A spinning bicycle wheel resists efforts to tilt it and point the axle in a new direction. Any rapidly spinning wheel exhibits this gyroscopic property—you can use this tendency to take yourself for a spin.
The eye’s retina receives and reacts to incoming light and sends signals to the brain, allowing you to see. One part of the retina, however, doesn't give you visual information—this is your eye’s “blind spot.”
When sunlight travels through the atmosphere, blue light scatters more than other colors, leaving a yellowish hue to the transmitted light. The scattered light makes the sky blue; the transmitted light makes the sunset red.
When certain plastics are placed between two pieces of polarizing material, their stress patterns become dramatically visible in a brightly colored display. A stressed plastic object can be used to illustrate stresses found in bones.