Do you have blue eyes? We talked to experts to discover curious facts about baby blues, including whether your biological ...

For most of my life I have had dark rings around my eyes. I drink lots of water and try to get regular sleep but they don't seem to go away.

Blue rings found in the stems of trees and bushes in Norway point to a historic cold period in the late 1800s, but the exact cause of this climatic event remains unclear, scientists say.

Trees need a certain number of warm days in their growing seasons to grow properly; otherwise, the cell walls of new growth don't lignify properly, creating 'blue rings' that appear when wood samples ...

Taken from a tree in Norway, this stained tree sample shows a blue ring from 1902. (Credit: Pawel Matulewski and Liliana Siekacz) Human skin isn't the only thing that can change color after facing the ...

By studying these blue rings, researchers can pinpoint periods of extreme cold, with the latest findings highlighting significant cooling events in 1902 and 1877. A close-up of a young green pine ...