For decades, scientists have conducted research centered around the five major mass extinctions that have shaped the world we live in. The extinctions date back more than 450 million years with the Late Ordovician Mass Extinction ...
Earth Sciences
May 21, 2018
2
459
Scientists examining evidence across the world from New Jersey to North Africa say they have linked the abrupt disappearance of half of earth's species 200 million years ago to a precisely dated set of gigantic volcanic eruptions. ...
Earth Sciences
Mar 21, 2013
1
0
(PhysOrg.com) -- Nuclear fission, or the splitting of a heavy nucleus, usually results in symmetrical fragments of the same mass. Physicists attribute the few known examples of fission that is asymmetric to the formation ...
About 183 million years ago, volcanic activity in modern South Africa unleashed an estimated 20,500 gigatons of carbon dioxide (CO2) into the ocean–atmosphere system over a period of 300 to 500 thousand years. Known as ...
Earth Sciences
Jun 25, 2024
1
158
Uranium is not always the same: depending on whether this chemical element is released by the civil nuclear industry or as fallout from nuclear weapon tests, the ratio of the two anthropogenic, i.e. man-made, uranium isotopes ...
Materials Science
Mar 9, 2020
0
179
According to some experts, nuclear power holds great promise for meeting the world's growing energy demands without generating greenhouse gases. But scientists need to find a way to remove radioactive isotopes, both from ...
Nanophysics
Oct 30, 2019
1
295
SHINE Medical Technologies and partner Phoenix LLC have developed a new way to produce molybdenum-99 (Mo-99) for use in medical applications. They claim that testing has shown their new technology breaks the world record ...
Until recently, the analysis and identification of nuclear fuel pellets in nuclear forensics investigations have been mainly focused on macroscopic characteristics, such as fuel pellet dimensions, uranium enrichment and other ...
Analytical Chemistry
Aug 30, 2019
0
69
The effort to secure a stable, domestic source of a critical medical isotope reached an important milestone this month as the U.S. Department of Energy's (DOE) Argonne National Laboratory demonstrated the production, separation ...
General Physics
Jun 15, 2015
0
39
From the beginning of time, uranium has been part of the Earth and, thanks to its long-lived radioactivity, it has proven ideal to date geological processes and deduce Earth's evolution. Natural uranium consists of two long-lived ...
Earth Sciences
Jan 20, 2015
21
1490
