Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




DEEP IMPACT
Early Earth suffered 500-million-year asteroid storm
by Brooks Hays
Boulder, Colo. (UPI) Jul 31, 2014


disclaimer: image is for illustration purposes only

Scientists say early Earth would have technically been inhabitable, but it wouldn't have been a very pleasant place to live. Researchers say little pockets of calmer life-sustaining water likely existed amid the boiling seas and giant magma fields.

But any organisms brave enough to carve out a niche on early Earth would have needed to endure extreme conditions, including an asteroid storm that peppered the planet for 500 million years. Some asteroids were as small as football field. The big ones were 1,000 times the size of Manhattan.

Dr. Simone Marchi and his colleagues at the Southwest Research Institute, in Boulder, Colo., developed a computer model that predicts what this hellish time in Earth's earliest days -- called the Hadean epoch -- might have looked like. And though it wouldn't have been so pleasant for inhabitants, Marchi and others say these characteristics made what Earth is today, perhaps paving the way for life as we know it.

"The oldest traces for life on Earth have been found in old rocks -- isotopic traces of life. Those rocks date to 3.9 billion years old," explained Marchi -- a date not long after the asteroid storm of the Hadean eon.

"Is that just a coincidence or is there a more profound link to what's going on in the Hadean and the present? It's a very difficult problem to address, and there's a lot of work to be done in that regard. This paper is just a step toward that goal."

Marchi, whose recent research into Earth's earliest conditions was published in Nature, thinks more research is needed to understand exactly how these asteroids shaped Earth.

"When you have a large collision, you basically dig a large hole in the ground, and that means mixing and melting of the rocks," explained Marchi. "The heat from the impact can melt rocks in the proximity of collision. Mixing, melting and burial of rocks must have been extremely important back then, and we need to understand how the crust formed."

.


Related Links
Asteroid and Comet Impact Danger To Earth - News and Science






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





DEEP IMPACT
Gigantic crater found in Siberia
Siberia Yamal, Russia (UPI) Jul 16, 2013
What's going on in Russia? Last year it was the sky falling with the Chelyabinsk meteor. Now it appears that the ground is opening up. Russians have discovered a mysterious hole in middle of Siberia - a crater stretching some 260 feet across. Outfit the hole with rings of teeth-like spikes and you'd think it was sarlacc from Star Wars: Return of the Jedi. Making matters more surreal, t ... read more


DEEP IMPACT
Manned Moon Mission to Cost Russia $2.8 Bln

Tidal forces gave moon its shape

Riddle of bulging Moon solved at last

China's biggest moon challenge: returning to earth

DEEP IMPACT
Los Alamos Laser Selected for 2020 Mars Mission

NASA Announces Mars 2020 Rover Payload to Explore the Red Planet as Never Before

Mars 2020 rover will carry tools to make oxygen

NASA Long-Lived Mars Opportunity Rover Passes 25 Miles of Driving

DEEP IMPACT
Captains of industry explore space's new frontiers

Perlan partners with Airbus to fly glider to edge of space

First synthetic biological leaf could allow humans to colonize space

NASA's IBEX and Voyager spacecraft drive advances in outer heliosphere research

DEEP IMPACT
China's Circumlunar Spacecraft Unmasked

China to launch HD observation satellite this year

Lunar rock collisions behind Yutu damage

China's Fast Track To Circumlunar Mission

DEEP IMPACT
Europe's Fifth and Final Resupply Ship Launches to Station

Science and Spacesuit Work While ATV-5 Preps for Launch

Russian Cargo Craft Launches for 6-Hour Trek to ISS

ISS Crew Opens Cargo Ship Hatch, Preps for CubeSat Deployment

DEEP IMPACT
US Launches Two Surveillance Satellites From Cape Canaveral

United Launch Alliance Marks 85th Successful Launch

US aerospace firm outlines New Zealand-based space program

China to launch satellite for Venezuela

DEEP IMPACT
Young binary star system may form planets with weird and wild orbits

Hubble Finds Three Surprisingly Dry Exoplanets

Astronomers come up dry in search for water on exoplanets

Hubble Finds Three Surprisingly Dry Exoplanets

DEEP IMPACT
Printing the Metals of the Future

New characteristics of complex oxide surfaces revealed

Building the Foundation for Future Synthetic Biology Applications with BRICS

Collecting just the right data




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.