HOME >> BIOLOGY >> NEWS
New CU-NASA research belies previous idea that Mars was once warm, wet planet

A new study led by University of Colorado at Boulder researchers indicates Mars has been primarily a cold, dry planet following its formation some 4 billion years ago, making the possibility of the evolution of life there challenging at best.

Led by CU-Boulder doctoral candidate Teresa Segura and her adviser, Professor Owen B. Toon, the team used Mars photos and computer models to show that large asteroids or comets hit the planet some 3.5 billion years ago. These impacts apparently occurred about the time major river channels were formed on the Red Planet, said Segura.

According to the available evidence, roughly 25 huge impactors, each about 60 miles to 150 miles in diameter, slammed into Mars roughly every 10 million to 20 million years during the period, blowing a volume of debris equivalent to a global blanket hundreds of yards thick into the atmosphere. The material is believed to have melted portions of subsurface and polar ice, creating steam and scalding water that rained back on Mars at some six feet per year for decades or centuries, causing rivers to form and flow, according to the study.

But the study belies the warm, wet, Mars theory of rivers and oceans embraced by many planetary scientists, since such impactors were so infrequent. "There apparently were some brief warm and wet periods on Mars, but we believe that through most of its history, Mars has been a cold, dry planet," said Segura, currently a visiting researcher at NASA-Ames in California.

A paper by Segura, Toon, CU-Boulder graduate Anthony Colaprete -- now at NASA-Ames -- and Kevin Zahnle of NASA-Ames, will appear in the Dec. 6 issue of Science.

"When the river valleys on Mars were confirmed in the 1970s, many scientists believed there once was an Earth-like period with warmth, rivers and oceans," said Toon, director of CU-Boulder's Program in Oceanic and Atmospheric Sciences and a professor at the University's Laboratory for Astrophysics and Space
'"/>

Contact: Teresa Segura
segurat@colorado.edu
650-604-0321
University of Colorado at Boulder
5-Dec-2002


Page: 1 2 3

Related biology news :

1. Leader in cancer treatment and prevention research honored
2. UT Southwestern receives $1.78 million grant for obesity research as part of NIH Roadmap initiative
3. Scientists to prototype cyberinfrastructure for research and education access to ocean observatories
4. Belgian researchers explore revolutionary approach to angiogenesis
5. Award winning researchers reveal potential new role for Glivec
6. New research shows plants can shuffle and paste gene pieces to generate genetic diversity
7. 16 APS exercise research highlights, from reduced flu mortality to proteomics & obesity
8. Gene chips research in cotton could lead to superior variety
9. Groundbreaking research could ignite new solutions to heat transfer in nano-devices
10. New hydrothermal vents discovered as South Pacific Odyssey research begins
11. University of Alberta researcher looks for clues to mysterious disease

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: New NASA research belies previous idea that Mars was once warm wet planet

(Date:5/7/2015)... Sweden , May 7, 2015 ... touch fingerprint sensors, FPC1022 and FPC1035, FPC,s smallest ... and FPC1035 are mainly considered for integration on ... size gives smartphone OEMs increased possibilities to integrate ... The decreased size also improves possibilities for module ...
(Date:5/5/2015)... May 5, 2015, NXT-ID, Inc. (NASDAQ: NXTD ... on the growing mobile commerce market, reminds investors and media ... Officer, is presenting  at CARTES SECURE CONNEXIONS AMERICA 2015, held ... The three-day conference is organized into a ... in is themed Global Fraud: Where is the Trust ...
(Date:4/27/2015)... 27, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market, announces that ... customers the first week of May, 2015 and will ... May. Gino Pereira , Chief ... the company as Wocket® enters the consumer market. We ...
Breaking Biology News(10 mins):FPC Introduces its Smallest Touch Fingerprint Sensors to Date 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 3Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3
(Date:5/28/2015)... -- RXi Pharmaceuticals Corporation (NASDAQ: RXII ), a ... primarily in the areas of dermatology and ophthalmology, today ... million units at a price to the public of ... million. Each unit consists of (i) one share of ... purchase 0.50 of a share of common stock at ...
(Date:5/28/2015)... (PRWEB) May 28, 2015 The Fertility ... our own Dr. Danielle Vitiello has taken on a ... role, Dr. Vitiello will provide guidance, leadership, oversight and ... to count Dr. Vitiello among our team of experienced ... and CEO, Joseph A. Hill, M.D. “Her expertise and ...
(Date:5/28/2015)... May 28, 2015 American Process ... (Oak Ridge, TN) recently signed a joint ... printing plastic resins using nanocellulose, a rapidly emerging ... 3D printing is the limited number of feedstock ... mechanical strength to printed parts for load bearing ...
(Date:5/27/2015)... LONDON , May 27, 2015  The ... provides comprehensive understanding and unprecedented access to the ... worlds leading healthcare companies during 2014. ... gain insight into the partnering activities of the ... view all the partnering and alliances deals announced ...
Breaking Biology Technology:RXi Pharmaceuticals Announces $10 Million Public Offering of Common Stock and Warrants 2RXi Pharmaceuticals Announces $10 Million Public Offering of Common Stock and Warrants 3Danielle Vitiello, MD of Fertility Centers of New England, Named New Medical Director 2American Process Inc. Announces Partnership with Oak Ridge National Laboratory to Make 3D Printing Plastic Resins Stronger and More Sustainable 2American Process Inc. Announces Partnership with Oak Ridge National Laboratory to Make 3D Printing Plastic Resins Stronger and More Sustainable 3Companion Diagnostics Deals and Alliances of 2014 2
Cached News: