HOME >> BIOLOGY >> NEWS
Ancient supernova may have triggered eco-catastrophe

An exploding star may have destroyed part of Earths protective ozone layer 2 million years ago, devastating some forms of ancient marine life, according to a new theory presented at this weeks meeting of the American Astronomical Society.

The new theory brings together puzzling clues from several different fields of research, including paleontology, geology and astronomy.

Narciso Benitez, an associate research scientist in astronomy in the Krieger School of Arts and Sciences at The Johns Hopkins University, says the missing smoking gun that brought the clues together was the revelation that a stellar cluster with many large, short-lived stars prone to producing supernovae had passed near Earths solar system several million years ago.

That discovery, made by co-author and Space Telescope Science Institute astronomer Jess Maz-Apellniz, led Bentez to check the scientific record for potential effects of nearby supernovae on the Earth.

Nobody had realized that this cluster of stars that Jess had tracked, which is known as the Scorpius-Centaurus OB association, could have been so close to Earth during the past several million years, Bentez says. And when I did a search, one of the first things that popped out was a 1999 finding where a team of German astronomers led by Klaus Knie detected the presence of a highly unusual isotope of iron in samples of the Earths crust drilled from the deep ocean bottom.

Knie had proposed that the iron isotope was debris from a recent supernova explosion that took place close to Earth. But astronomers had no plausible candidates for such a nearby explosion until Maz-Apellnizs work with the Scorpius-Centaurus association, which is also being presented at this weeks meeting of the American Astronomical Society.

Bentez compared data produced by Maz-Apellniz and Knies results, and found very good agreement, both in the amount of iron deposited and in its time distribution.

Bentez cons
'"/>

Contact: Michael Purdy
mcp@jhu.edu
410-516-7160
Johns Hopkins University
8-Jan-2002


Page: 1 2 3

Related biology news :

1. Ancient life form may help create newest technologies
2. Ancient brewery discovered on mountaintop in Peru
3. Ancient Greeks help scientists build environmentally friendly nano devices
4. Ancient DNA mutations permitted humans to adapt to colder climates, UCI researchers find
5. Ancient Inca road in desperate need of protection
6. Ancient DNA analysis unveils mystery of historys most horribly deformed man -- The Elephant Man
7. Ancient pollen yields insight into forest biodiversity
8. Ancient defense mechanism may still be protecting us
9. Ancient flower fossil points to underwater origins
10. Ancient Chinese folk remedy may hold key to non-toxic cancer treatment
11. Ancient reptile is efficient chewer

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:11/12/2019)... ... November 12, 2019 , ... In’Tech Medical SAS ( http://www.intech-medical.com ... creation of a Global Regulatory Affairs Department, to support Medical Device companies across ... regulatory element to any Medtech organization is more important than Research & Development, ...
(Date:11/11/2019)... Fla. (PRWEB) , ... November 11, 2019 , ... ... Sequencing (NGS) in microbial identification, played a key role in the award-winning study ... led by the Rothman Institute. The molecular diagnostic laboratory processed samples using Next ...
(Date:11/6/2019)... (PRWEB) , ... November 06, 2019 , ... ... launched a new podcast to provide information to patients about a poorly disclosed ... treatments are given without knowing the dose of the treating stem cells. ...
Breaking Biology News(10 mins):
(Date:11/12/2019)... Switzerland (PRWEB) , ... November ... ... provider of enterprise software solutions for biopharmaceutical R&D, today announced that ... immunotherapies, has adopted Genedata Biologics® to streamline their R&D operations ...
(Date:11/9/2019)... (PRWEB) , ... November 08, ... ... of artificial intelligence (AI)-powered technology for use in pathology research, today announced ... liver biopsy samples from patients enrolled in the phase 3 selonsertib studies ...
(Date:11/5/2019)... ... November 05, 2019 , ... Focal ... CE Mark for its Fusion Bx 2.0 prostate fusion biopsy solution. By combining ... Fusion Bx 2.0 will give urologists across Europe the ability to perform targeted ...
(Date:11/2/2019)... ... October 31, 2019 , ... drug360 graph, a ... tellic. drug360 brings tellic’s expertise in biomedical language processing and machine learning ... uncover relationships between genes, diseases, variants, phenotypes, and other biomedical entities. Researchers ...
Breaking Biology Technology:
Cached News: