Despite its prior status as a luxury commodity, silver became widely used for coinage in the Roman world from the 7th century BCE onward and provided a standardized monetary system for ancient Mediterranean civilizations. ...
Archaeology
Dec 17, 2021
0
121
As Curiosity rover marches across Mars, the red planet's watery past comes into clearer focus.
Space Exploration
Apr 19, 2018
4
634
In 1811 and 1812, the region around New Madrid, Missouri, experienced a number of major earthquakes. The final and largest earthquake in this sequence occurred on the Reelfoot fault, and temporarily changed the course of ...
Earth Sciences
Nov 6, 2018
0
208
In the karstic caves of Puerto Rico, cave art paints the rock walls. Previous research has assigned ages to this art based on the ages of nearby archaeological artifacts within the caves, but these ages are relative and may ...
Archaeology
Oct 17, 2023
0
347
Buried a mile beneath Greenland's thick ice sheet is a network of canyons so deep and long that the largest of these has been called Greenland's "Grand Canyon." This megacanyon's shape suggests it was carved by running water ...
Earth Sciences
Apr 30, 2020
9
482
Earth is bombarded every year by rocky debris, but the rate of incoming meteorites can change over time. Finding enough meteorites scattered on the planet's surface can be challenging, especially if you are interested in ...
Earth Sciences
May 23, 2019
4
590
A new focus article in the May issue of Geology summarizes research on plastic waste in marine and sedimentary environments. Authors I.A. Kane of the Univ. of Manchester and A. Fildani of the Deep Time Institute write that ...
Earth Sciences
May 4, 2021
4
615
Throughout history, people have sought to understand how the world came to be and how it has changed over time. This curiosity has produced a rich legacy of science and philosophy and impacted and influenced religion and ...
Earth Sciences
Nov 5, 2012
56
0
The earliest morphological traces of life on Earth are often highly controversial, both because non-biological processes can produce relatively similar structures and because such fossils have often been subjected to advanced ...
Astrobiology
Nov 7, 2022
13
311
Sea levels are rising faster than expected from global warming, and University of Colorado geologist Bill Hay has a good idea why. The last official IPCC report in 2007 projected a global sea level rise between 0.2 and 0.5 ...
Earth Sciences
Nov 1, 2012
24
0
