Besides swathes of destroyed vegetation, forest fires in Amazonia leave their imprint on the Amazon River and its tributaries. Incomplete burning of trees results in the production of black carbon, solid particles that enter ...
Environment
Nov 20, 2019
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34
An international team of researchers who discovered a vast network of stone walls along the River Nile in Egypt and Sudan say these massive "river groins" reveal an exceptionally long-lived form of hydraulic engineering in ...
Archaeology
Jun 13, 2023
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396
The rocks on Earth are not all the same age. In fact, most are significantly younger than the planet itself. The oldest sections of the oceanic crust are thought to be 200 million years old—a blink of an eye in the planet's ...
Planetary Sciences
Dec 22, 2022
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63
A new study by a team of geologists that includes Kansas State University's Matthew Brueseke has found that the Wrangell volcanic belt in Alaska's Wrangell-St. Elias National Park and Preserve is older than previously recognized ...
Earth Sciences
Dec 19, 2018
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4
The Earth is 4.565 billion years old, give or take a few million years. How do scientists know that? Since there's no "established in" plaque stuck in a cliff somewhere, geologists deduced the age of the Earth thanks to a ...
Earth Sciences
Oct 23, 2017
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3
Recent puzzling observations of tiny variations in nuclear decay rates have led some to question the science of using decay rates to determine the relative ages of rocks and organic materials. Scientists from the National ...
General Physics
Sep 15, 2010
9
0
The Earth's magnetic field periodically reverses such that the north magnetic pole becomes the south magnetic pole. The latest reversal is called by geologists the Matuyama-Brunhes boundary (MBB), and occurred approximately ...
Earth Sciences
Jul 7, 2015
0
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