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:3/3/2020)... ... ... Amplify Surgical, Inc., today announces that the company reached the milestone of ... The landmark case was performed by Dr. Ali Najafi at Fresno Heart and Surgical ... changed the game for expandable interbodies. The ability to achieve an ALIF sized ...
(Date:3/2/2020)... ... March 02, 2020 , ... Philadelphia IP law firm Panitch ... J.D. has joined the firm as a Partner, and Stephany G. Small, Ph.D., has ... patent attorney and will be a partner in the firm’s biotechnology and life science ...
(Date:2/28/2020)... ... ... Meridian Clinical Research , a leading investigative research network, is a ... Clinical Trial Site. Meridian is also the largest member of Platinum Research Network ... were the result of two voting rounds, and winners will be announced at the ...
Breaking Biology News(10 mins):
(Date:2/28/2020)... ... 2020 , ... Designed primarily for laboratory and industrial use, ... thus simplifying setup, streamlining integration, and optimizing workflow. Capable of recording FHD (1080p) ... new HS Series cameras to be released. The HS Series includes cameras with ...
(Date:2/21/2020)... TORONTO (PRWEB) , ... February 21, 2020 , ... Join ... – Southeast Region of Sequence, Inc. for an informative session ... , Design Flexibility: Key elements to incorporate into facility design to add manufacturing ...
(Date:2/13/2020)... ... February 12, 2020 , ... Arriello ... services, is adopting Veeva Vault Safety™ as part of the company’s ... assessment of data, processing of safety information such as SUSARs and ICSRS, aggregate ...
(Date:2/5/2020)... ... , ... Rare Disease Day® , held the last day in February ... (NORD), to raise awareness amongst the general public and decision-makers about rare diseases and ... Mystery” rare disease series will be shining the light on Rare Disease ...
Breaking Biology Technology:
Cached News: