In the waters off Iwo Jima, a volcanic island in Japan’s Satsuma archipelago, the sea has a distinct green tint. It’s not just a trick of the light — it’s caused by microscopic particles of oxidized ...

A team of scientists in California say they have discovered a new color they named olo, but you can't see the "most intense teal" with the naked eye.

The plant gives it a greenish tint that is useful camouflage in the trees of its Central and South American rain forest home. Sloths are identified by the number of long, prominent claws that they ...