Q: This fall, I had three somewhat decrepit ash trees cut down. A friend with a chainsaw cut a cross section so I could count the rings. How far out do the countable rings go? Do I count the rings in ...

The world's oldest trees were growing when the Great Pyramid of Giza was being built and were already thousands of years old when Julius Caesar came to power. To determine a tree's age, scientists ...

There are a couple of things to consider before scientists survey trees. First, they must find a site where humans haven’t affected the area with logging or other research. Then they pick a group of ...

If you want to learn a tree’s age, you can count their rings. When it comes to humans, scientists have yet to find any ...