This animated interactive explains how a research group is using light to measure the speed of objects millions of miles away. Light that is farther away will appear to be a different color than a light that is closer. So by measuring the rate of color shifts, they can estimate velocity.
Light from the center of the galaxy
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Who is Older and Younger than You
Here’s a chart to show you how long you have until you start to feel your age.
Seeing How Much We Ate Over the Years
How long will chicken reign supreme? Who wins between lemon and lime? Is nonfat ice cream really ice cream? Does grapefruit ever make a comeback? Find out in these charts.