TUESDAY, Dec. 23, 2025 (HealthDay News) — Trees don’t just clean the air, they also keep a quiet record of the past. New ...

The air bubbles from her scuba rig rise from a cloud of mud and dead plant matter stirred up from the bottom of the lake. A large stump looms in front of her, rising to the surface. Then there’s a ...

How do you determine the age of a tree? Just count the rings, of course! One ring equals one year of growth. If you’ve ever stumbled upon a tree stump you may have even done it yourself. But if you’re ...

TREES HAVE STORIES to tell. Within their annual growth rings are records of drought and deluge, but scientists can also use them to reconstruct environmental pollution events. Tree rings can be used ...

Dendrochronologists extract a small, pencil-shaped sample of wood from a tree with a tool called an increment borer. The tiny hole left in the tree's trunk quickly heals as the tree continues to grow.

Researchers led by Yuko Motizuki from the Astro-Glaciology Laboratory at the RIKEN Nishina Center in Japan have developed a new laser-based sampling system for studying the composition of ice cores ...