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.

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 ...

Scientists have discovered that peculiar "blue rings" in wood samples reveal the aftermath of chilling volcanic eruptions that disrupted growing seasons over a century ago. When summers turn ...

A blue ring formed in 1902 in a tree in northern Norway. Image by Pawel Matulewski and Liliana Siekacz. Scientists studying pine trees and juniper shrubs in northern Scandinavia are revealing the ...

Overall, only 2.1% of the pine trees' rings and 1.3% of the juniper shrubs' rings were blue; the cells which hadn't lignified properly were mainly found at the end of growth rings, in latewood ...

The hottest trend in the wearables market is smart rings, health trackers worn discreetly around your finger. Although Samsung just unveiled its take on the trend -- the Galaxy Ring -- this ...

"And y'all, we did it on our first go." The second stage of the rocket is now gliding through orbit, carrying the Blue Ring Pathfinder payload, and its upper stage will later attempt to re-enter ...

Blue Origin, founded by Jeff Bezos, attempts to launch and land its powerful New Glenn rocket from Florida's Cape Canaveral Space Force Station.