Navigation Links
Did the solar system 'bounce' finish the dinosaurs?
Date:5/2/2008

The suns movement through the Milky Way regularly sends comets hurtling into the inner solar system coinciding with mass life extinctions on earth, a new study claims.

Scientists at the Cardiff Centre for Astrobiology built a computer model of our solar systems movement and found that it bounces up and down through the plane of the galaxy. As we pass through the densest part of the plane, gravitational forces from the surrounding giant gas and dust clouds dislodge comets from their paths. The comets plunge into the solar system, some of them colliding with the earth.

The Cardiff team found that we pass through the galactic plane every 35 to 40 million years, increasing the chances of a comet collision tenfold. Evidence from craters on Earth also suggests we suffer more collisions approximately 36 million years. Professor William Napier, of the Cardiff Centre for Astrobiology, said: Its a beautiful match between what we see on the ground and what is expected from the galactic record.

The periods of comet bombardment also coincide with mass extinctions, such as that of the dinosaurs 65 million years ago. Our present position in the galaxy suggests we are now very close to another such period.

While the bounce effect may have been bad news for dinosaurs, it may also have helped life to spread. The scientists suggest the impact may have thrown debris containing micro-organisms out into space and across the universe.

Centre director Professor Chandra Wickramasinghe said: This is a seminal paper which places the comet-life interaction on a firm basis, and shows a mechanism by which life can be dispersed on a galactic scale.


'/>"/>

Contact: Chandra Wickramasinghe
wickramasinghe@cardiff.ac.uk
44-292-087-4201
Cardiff University
Source:Eurekalert

Page: 1

Related biology news :

1. Nanotech could make solar energy as easy and cheap as growing grass
2. Smarter energy storage for solar and wind power
3. Hinode: new insights on the origin of solar wind
4. Nanowires hold promise for more affordable solar cells
5. Telecom research leads to solar cell breakthrough
6. Substantial improvement in essential cheap solar cell process
7. The future of solar-powered houses is clear
8. Popcorn-ball design doubles efficiency of dye-sensitized solar cells
9. Solar flares set the Sun quaking
10. Bursts of waves drive immune system soldiers toward invaders
11. Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/22/2014)... 22, 2014 Aware, Inc. (NASDAQ: AWRE ... reported financial results for its second quarter ended June 30, ... was $6.8 million, an increase of 53% compared to $4.4 ... patent related income in the second quarter of 2014 was ... of 2013. The increase in revenue and operating income was ...
(Date:7/22/2014)... 2014) New research from the Monell Center reveals ... can increase airway inflammation in asthmatics for at least ... that expectations can play in health-related outcomes. , "Asthmatics ... expect that an odor is harmful, our bodies react ... lead author Cristina Jan, PhD, a Monell physiologist. "Both ...
(Date:7/22/2014)... July 14, 2014, by lightning from a weather system that ... four fires: Stokes Fire, Gold Hikes Fire, French Creek Fire ... are now one larger fire. The fires are burning in ... 243,000 acres in size. The present fire situation continues ... and firefighter safety is the priority on the Carlton Complex ...
Breaking Biology News(10 mins):Aware, Inc. Reports Second Quarter 2014 Financial Results 2Aware, Inc. Reports Second Quarter 2014 Financial Results 3Aware, Inc. Reports Second Quarter 2014 Financial Results 4Aware, Inc. Reports Second Quarter 2014 Financial Results 5Aware, Inc. Reports Second Quarter 2014 Financial Results 6Aware, Inc. Reports Second Quarter 2014 Financial Results 7In asthma, it's not just what you smell, but what you think you smell 2In asthma, it's not just what you smell, but what you think you smell 3
... Arthur Conan Doyle,s account of an isolated community of dinosaurs ... has no less appeal now than it did when it ... to recreate the lost world of dinosaurs, but today the ... evidence suggests that dinosaur bones from the Ojo Alamo Sandstone ...
... Bourne, a computational biologist and professor with the University ... 2009 Benjamin Franklin Award this week in recognition of ... and open dissemination of science and scientific data. , ... at the annual meeting of the Bioinformatics Organization in ...
... Key Largo, Fla. April 27, 2009 A new ... technique for reattaching large sponges that have been dislodged from ... restoration of other large sponge species removed by human activities ... barrel sponge were removed and reattached at Conch Reef off ...
Cached Biology News:Evidence of the 'Lost World' -- did dinosaurs survive the end Cretaceous extinctions? 2Open access advocate Philip E. Bourne to receive 2009 Benjamin Franklin Award 2Open access advocate Philip E. Bourne to receive 2009 Benjamin Franklin Award 3Large sponges may be reattached to coral reefs 2
(Date:7/23/2014)... Boston, MA (PRWEB) July 23, 2014 ... regenerative medicine transplant therapies are biological, but not ... trials may seem to treat them as if ... as well as unsanctioned studies that constitute “stem ... transplantation as an approach to developing new regenerative ...
(Date:7/22/2014)... June 22, 2014 Even within a phylum so full ... distinguished among other arthropods for its cruelty -- at least ... America, the fly is a most predatory sort of parasite. ... deposits a smear of larvae, and leaves its wicked brood ... , None of this would be possible without the ...
(Date:7/22/2014)... , July 22, 2014   BioTE Medical ... using natural, bio-identical hormone pellets, today announced the ... to the company.   Dr. Rouzier is joining the ...     Dr. Rouzier was residency trained ... and is a board certified emergency physician still ...
(Date:7/22/2014)... 2014 Rice Lake Weighing ... 2014 NCSL International Workshop and Symposium July 28-31 ... CONDEC pressure instrumentation, OIML M1 weights, precision lab ... customized sets, Essential Weights™. , NCSL International was ... in solving the common problems faced by measurement ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 2The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 3The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 4The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 5Fly-inspired sound detector 2Fly-inspired sound detector 3Fly-inspired sound detector 4Dr. Neal Rouzier Joins BioTE Medical 2Dr. Neal Rouzier Joins BioTE Medical 3Rice Lake Weighing Systems Showcases Metrology Solutions for the 2014 NCSL International Workshop & Symposium 2
... Applied scientists at the Harvard School of Engineering and ... Photonics in Hamamatsu City, Japan, have demonstrated, for the ... of the emitted radiation, known as polarization, can be ... door to a wide range of applications in photonics ...
... BAX ), will host a quarterly conference call ... April 16, 2009, at 8:30 a.m. Eastern Time (7:30 a.m. ... (domestic) or 703-639-1156 (international). Please dial into the call ... call for the operator to connect you.This call is being ...
... Structure By Completing the Elimination of All Previously Outstanding ... and MTA: CTIC) today announced that it has agreed ... Preferred Stock and warrants in a registered offering to ... for $15 million cash, shares of Series 1 Preferred ...
Cached Biology Technology:Scientists demonstrate laser with controlled polarization 2Cell Therapeutics, Inc. Announces Single Institutional Investor Purchases $15 Million of Preferred Stock 2Cell Therapeutics, Inc. Announces Single Institutional Investor Purchases $15 Million of Preferred Stock 3
100 g monoclonal antibody which can immunocapture ~10 g of Complex IV from heart mitochondria. Also included are 2 mg of bovine heart mitochondria for control immunocapture....
Anti-gp120/160(SIV/mac239) Immunogen: gp120(SIV/mac239) protein (Genebank accession #M33262)...
Rabbit polyclonal to GPR56 ( Abpromise for all tested applications). entrezGeneID: 9289 SwissProtID: Q9Y653...
Annexin V Binding Buffer, 10X Concentrate Buffer , 50 ml Consult technical datasheet for details....
Biology Products: