Astronomers often have more questions than answers about the universe — and the universe, in turn, has asked its own question ...

A rainbow, or the visible light spectrum, includes a beautiful array of colors, but it does not include all colors ...

Celebrate a Harvest Moon lunar eclipse and an occultation of the planet Saturn, just days before Neptune reaches opposition.

Help students realize that one way the objects can be sorted is by color, according to which ones are red, blue, or green. Explain that color is a “property” of an object. Explain that the objects can ...

Have you ever wondered why oranges, mandarins, and other citrus fruits are often sold in red or orange nets? It's not just a ...

When oranges are not sold loose on the shelves, they usually come in red mesh bags. You may have never thought twice about ...

Since the advent of geobrowser Google Earth, a number of strange and mysterious things around the globe are visible.

Saturation describes the neutrality of a color; a red object with little or no white is said to be very saturated. The lightness of a color tells us about its relative ordering on the dark-to ...

Red hair for the fall season might not seem like the most innovative of trends, but it's back again! The color fits right in ...

And other cultural predictions based on movies that played at the Toronto International Film Festival, including Pedro ...

Forget a red flag — if you see purple, start running. In nearly two dozen states, a purple marking on a tree or other ...

Orange, blue, calico, two-toned and … cotton-candy colored? Those are all the hues of lobsters that have showed up in fishers ...