In the natural world, the absence of bright colours is anything but dull. Black or white, or combinations of both, adorn some of nature's most charismatic creatures. The giant panda, native to the ...

An exotic colour at the far end of our visible spectrum and often associated with royalty, purple is relatively rare in nature. But some vibrant plants, animals and fungi do show off a regal purple, ...

Hall, on the east peak of the Berceau(3,640 ft.) on the 25th inst, a circular rainbow was visible at 2.30 P. M. upon the upper surface of light white clouds that drifted from S. up the rocky ...

We are taught the rainbow is composed of red, orange, yellow, green, blue and violet, and sometimes that there are invisible colors, infrared and ultraviolet, on either side. And we learn that ...

The atmospheric phenomenon, technically known as a circumhorizontal arc, only occurs at precise locations under specific conditions.