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:8/26/2020)... ... August 24, 2020 , ... Elgia Therapeutics , ... fibrotic diseases, today announced that Dr. Stacie Canan has joined the company as ... previously served as Executive Director of Global Health at Bristol Myers Squibb (formerly ...
(Date:8/26/2020)... (PRWEB) , ... August 25, 2020 , ... Modality ... made Inc. magazine’s 2020 annual Inc. 5000 list. The list is the most prestigious ... in 2019 as well, and for this year’s list, reported three-year revenue growth of ...
(Date:8/21/2020)... , ... August 19, 2020 , ... ... LLC and SalivaBio LLC, businesses dedicated to Salivary Bioscience for more than twenty ... recently published book by Springer, " Salivary Bioscience: Foundations of Interdisciplinary Saliva Research ...
Breaking Biology News(10 mins):
(Date:8/3/2020)... ... 03, 2020 , ... Introducing Ardent Animal Health – MediVet Biologics rebrands company ... Known as MediVet Biologics since its formation in 2016, the company is relaunching ... Health will build on its base of innovative therapies for osteoarthritis and cancer. ...
(Date:7/31/2020)... Texas (PRWEB) , ... July 29, 2020 , ... ... solutions today announced the launch of its new tagline, “BUILDING FOR LIFE.” The ... biopharmaceutical industry and around the globe, requiring fast track capacity to provide patients ...
(Date:7/31/2020)... SHREWSBURY, Mass. (PRWEB) , ... July 29, 2020 ... ... clad wire that can combine up to three different materials for use with ... can combine up to three materials to meet specific design requirements, performance, and ...
(Date:7/31/2020)... , ... July 29, 2020 , ... eSource has long ... This webinar will cover the history of eSource, the reasons it did not take ... to wearables, to site source, the industry is moving towards capturing data electronically for ...
Breaking Biology Technology:
Cached News: