The established theory about the route by which Ice Age peoples first reached the present-day United States has been challenged by an unprecedented study which concludes that their supposed entry route was "biologically unviable".
Archaeology
Aug 10, 2016
44
2562
At the end of the Pleistocene period, approximately 12,800 years ago—give or take a few centuries—a cosmic impact triggered an abrupt cooling episode that earth scientists refer to as the Younger Dryas.
Earth Sciences
Jul 27, 2015
132
6624
Tiny ocean fossils distributed widely across rock surfaces in the Transantarctic Mountains point to the potential for a substantial rise in global sea levels under conditions of continued global warming, according to a new ...
Earth Sciences
Sep 22, 2016
16
1226
While conducting a study of Petermann Glacier in northwest Greenland, researchers at the University of California, Irvine and NASA's Jet Propulsion Laboratory uncovered a previously unseen way in which the ice and ocean interact. ...
Earth Sciences
May 8, 2023
0
379
At the turn of the 21st century, unbeknownst to the world, the Greenland ice sheet likely entered a state of sustained mass loss that will persist for the foreseeable future, according to a new study. Though the finding has ...
Earth Sciences
Sep 2, 2020
5
1640
A team of researchers affiliated with multiple institutions in the U.S. has successfully pulled an ice core from Antarctica's Ong Valley that contains samples of Earth's atmosphere from up to 5 million years ago. In their ...
New research shows that concentrations of the toxic element mercury in rivers and fjords connected to the Greenland Ice Sheet are comparable to rivers in industrial China, an unexpected finding that is raising questions about ...
Earth Sciences
May 24, 2021
9
1399
The world's second-largest ice sheet, and the single largest contributor to global sea-level rise, is potentially becoming unstable because of fractures developing in response to faster ice flow and more meltwater forming ...
Earth Sciences
Dec 2, 2019
38
3577
A new NASA study adds evidence that a geothermal heat source called a mantle plume lies deep below Antarctica's Marie Byrd Land, explaining some of the melting that creates lakes and rivers under the ice sheet. Although the ...
Earth Sciences
Nov 8, 2017
35
287
Many scientists say that liquid water is a key to understanding the behavior of the frozen form found in glaciers. Melt water is known to lubricate their gravelly bases and hasten their march toward the sea. In recent years, ...
Earth Sciences
May 5, 2022
0
162
