Up a tree dating

If a Bigtooth Maple were cut down on Mount Lemmon in 2016 and it had 400 rings, you would know the tree started growing in 1616. What if it's been used to build a home or a ship or a bonfire?The rings could still tell how many years the tree lived, but not necessarily when. He set out on a series of expeditions across the southwest to bridge the gap between contemporary wood and wood beams from the ruins of civilizations long gone.For decades, radiocarbon dating has been a way for scientists to get a rough picture of when once-living stuff lived.The method has been revolutionary and remains one of the most commonly used dating methods to study the past. Pearson, an assistant professor of dendrochronology at the University of Arizona, studies the past lives of trees to better understand the history of civilizations."Every year the trees in our forests show the swing of Time's pendulum and put down a mark.They are chronographs, recording clocks, by which the succeeding seasons are set down through definite imprints," he wrote in the pages of National Geographic.Dendrochronology and radiocarbon dating have intertwined histories, she explains, with roots firmly planted at the UA.

Thousands of years later, both those civilizations are long gone, but Methuselah lives on.

Discovery Health also has The New Dating Rules for hip, modern dwellers of the 21st century, as well as some tips for Dating for Dummies.

Check out the The Huffington Post for How to Find Love in a Greener World, or , and for a comprehensive list of green dating sites, try Elephant Journal.

Or hey-maybe your future partner is right in front of you.

If you're already working on a relationship-even if it's long distance--spice things up with an eco-friendly pet name and ideas for green dates.

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