In order to grow properly, trees need an adequate period of warmth during their growing seasons; otherwise, the cell walls [… ...

Trees need a certain number of warm days in their growing seasons to grow properly; otherwise, the cell walls of new growth ...

“I love putting a blue Christmas tree against white or beige walls, or against shades of pink, red or soft yellows. The contrast is breathtaking. These trees are also especially beautiful at ...

Learn more about these signs of summertime cold, perhaps tied to volcanic activity in 1877 and 1902.

Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.

In Norway, scientists have found blue rings in trees that hint at how volcanic eruptions disrupted growth throughout history.

Scientists studying pine trees and juniper shrubs in northern Scandinavia are revealing the weather of the past by looking at tree rings — which can tell us far more than just the trees’ age. ‘Blue’ ...