As of now, the collective redwood tree-ring record in California can reliably be traced back to the year 328, revealing drought years and other major weather events, Carroll said.

The tree rings of redwoods sometimes fade out or disappear for a variety of reasons, including growth irregularities and fire damage, making it difficult to compare and cross-date samples.

As Van Houten notes, “Like the light traveling from a star, the rings on a redwood tree are beautiful, tangible indicators of time’s passing.” Read more on In Sight: From bees to bison ...

As of now, the collective redwood tree-ring record in California can reliably be traced back to the year 328, revealing drought years and other major weather events, Carroll said.

On my office wall, there is a poster about the events in the life of a coast redwood tree in relation to human history. Not only that, it also shows a greater time scale, based on the lifespan of ...

Tree-ring science was used to document a coast redwood near Crescent City that is 2,520 years old. The oldest giant sequoia, a redwood species that grows in the Sierra, is 3,240 years old.

SCOTIA, Calif. -- After more than 20 years of protests, the last two people living in the giant redwoods of Northern California were climbing down for good, convinced by the new owners of the ...

The tree recognized as the tallest in the world is now off-limits to visitors. The National Park Service announced last week that it is discouraging hikers from visiting Hyperion, an old-growth ...

There's an interactive spirit at the University of Arkansas' department of geosciences, where dendochronologist David Stahle encourages visitors to touch a cross-section of a redwood tree. In the ...