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 ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. In the frigid landscapes of northern Norway, an unusual phenomenon ...

Which blue Christmas trees are best? Not only do artificial Christmas trees save the headache of caring for a real tree, they also provide you the opportunity to make your tree more uniquely yours.

On Monday, first lady Jill Biden revealed this year’s White House holiday decorations. Among them is the focal point of the Blue Room: the floor-to-ceiling Fraser fir Christmas tree. The tradition ...

Blue growth rings found in woody plant stems represent years when cells did not lignify properly because of summers too cold for growth When the going gets cold, even tough trees struggle with growing ...