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:10/17/2019)... ... 2019 , ... Advanced Clinical, a clinical research services organization, ... opening of new offices in Bucharest and Timisoara, Romania. Advanced Clinical’s increased interest ... in clinical trials. , Advanced Clinical’s entrance into Romania includes interdisciplinary teams ...
(Date:10/10/2019)... ... October 10, 2019 , ... Mindray, a global developer ... the American Society of Anesthesiologists 2019 Annual Meeting to visit exhibit #841 and ... Orlando, Florida, and will provide more than 14,000 healthcare professionals from around the ...
(Date:10/4/2019)... ... October 04, 2019 , ... Representatives with MyBioGate ( ... the Grand Elysée Hamburg Rothenbaumchaussee in Hamburg. , “To better connect Chinese companies ... Guo, Vice President of Operations and spokesperson for MyBioGate. , Guo went on ...
Breaking Biology News(10 mins):
(Date:9/30/2019)... ... September 30, 2019 , ... The September ... Rigaku Corporation , is now available online on the company’s global website. The ... including X-ray diffraction, fluorescence and imaging, and presents articles, scientific papers and news ...
(Date:9/24/2019)... ... September 24, 2019 , ... The Grain Foods Foundation ... Scientific Advisory Board. Dr. Holscher is an Assistant Professor of Nutrition in the ... at the University of Illinois Urbana-Champaign, where she has affiliate appointments with the ...
(Date:9/17/2019)... ... September 17, 2019 , ... Geneticure, Inc., a Rochester ... today that the U.S. Patent and Trademark Office (USPTO) and European Patent Office ... class recommendations for hypertension treatment. , The patent applies to Geneticure’s first ...
(Date:9/11/2019)... ... September 09, 2019 , ... Tunnell Consulting, an organization ... that its president and CEO Maryann Gallivan has been accepted into the Forbes ... Council accepted Gallivan based on the role she and Tunnell Consulting ...
Breaking Biology Technology:
Cached News: