Since trees and shrubs can live for hundreds of years, identifying these blue rings allows us to spot cold summers in the past. By looking at pine trees and juniper shrubs from northern Norway ...
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 ...
Buchwal's team analyzed samples from 25 Scots pine trees and 54 juniper shrubs, staining and photographing their growth rings under a microscope. The study revealed that blue rings were more ...
NEW ORLEANS (AP) — A rare frigid storm charged through Texas and the northern Gulf Coast on Tuesday, blanketing New Orleans and Houston with snow that closed highways, grounded nearly all flights and ...