Navigation Links
Mars' water appears to have been too salty to support life
Date:5/29/2008

CAMBRIDGE, Mass. -- A new analysis of the Martian rock that gave hints of water on the Red Planet -- and, therefore, optimism about the prospect of life -- now suggests the water was more likely a thick brine, far too salty to support life as we know it.

The finding, by scientists at Harvard University and Stony Brook University, is detailed this week in the journal Science.

"Liquid water is required by all species on Earth and we've assumed that water is the very least that would be necessary for life on Mars," says Nicholas J. Tosca, a postdoctoral researcher in Harvard's Department of Organismic and Evolutionary Biology. "However, to really assess Mars' habitability we need to consider the properties of its water. Not all of Earth's waters are able to support life, and the limits of terrestrial life are sharply defined by water's temperature, acidity, and salinity."

Together with co-authors Andrew H. Knoll and Scott M. McLennan, Tosca analyzed salt deposits in four-billion-year-old Martian rock explored by NASA's Mars Exploration Rover, Opportunity, and by orbiting spacecraft. It was the Mars Rover whose reports back to Earth stoked excitement over water on the ancient surface of the Red Planet.

The new analysis suggests that even billions of years ago, when there was unquestionably some water on Mars, its salinity commonly exceeded the levels in which terrestrial life can arise, survive, or thrive.

"Our sense has been that while Mars is a lousy environment for supporting life today, long ago it might have more closely resembled Earth," says Knoll, Fisher Professor of Natural Sciences and professor of Earth and planetary sciences at Harvard. "But this result suggests quite strongly that even as long as four billion years ago, the surface of Mars would have been challenging for life. No matter how far back we peer into Mars' history, we may never see a point at which the planet really looked like Earth."

T
'/>"/>

Contact: Steve Bradt
steve_bradt@harvard.edu
617-496-8070
Harvard University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Phoenix mission to Mars will search for climate clues
2. Biologists are from Mars, chemists are from Venus?
3. Missions to Mars
4. For the paper trail of life on Mars or other planets, find cellulose
5. Marsupial lion tops African lion in fight to death
6. Building blocks of life formed on Mars
7. Mars Express -- 5000 orbits and counting
8. Life on Mars pregnancy test successfully launched
9. Researcher strives for watershed moment
10. Saltwater sleuths: Seeking clues to help determine the ages of fish and shellfish populations
11. Reproductive plasticity revealed: Neotropical treefrog can choose to lay eggs in water or on land
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/9/2014)... can alleviate the symptoms of Alzheimer,s disease, ... and effectively scavenge amyloid beta peptide in ... reduced and eliminated Aβ deposition in an ... significantly improved behavioral and cognitive impairment. Dr. ... Hospital of China Medical University, China immunized ...
(Date:7/9/2014)... cancer patients with high levels of vitamin D in their ... shows. , Patients with the highest levels of vitamin ... with the lowest levels, the findings reveal. , The study ... D in bowel cancer patients after their diagnosis which ... from dietary sources with their long term survival prospects. ...
(Date:7/9/2014)... first make a copy of its DNA, a fundamental step ... times a day in the human body. While scientists have ... to replicate DNAthe enzymes that unzip the double-stranded DNA and ... how the process works. , Now, researchers at Rockefeller University ... on at the "replication fork"the point where DNA is split ...
Breaking Biology News(10 mins):Rockefeller scientists first to reconstitute the DNA 'replication fork' 2Rockefeller scientists first to reconstitute the DNA 'replication fork' 3Rockefeller scientists first to reconstitute the DNA 'replication fork' 4
... German . It would appear reasonable to assume ... blueprints. However, scientists from the Max Planck Institute for Developmental ... team have now decoded, for the first time, the entire ... a close relative of the thale cress ( Arabidopsis thaliana ...
... at the Keck School of Medicine of the University ... the first time that the human placenta plays an ... new treatment strategies that could mitigate health impacts such ... findings, conducted with researchers from Vanderbilt University as part ...
... , Berkeley In a new study suggesting pesticides ... researchers at the University of California, Berkeley,s School of Public ... widely used on food crops is related to lower ... that every tenfold increase in measures of organophosphates detected during ...
Cached Biology News:Evolution can cause a rapid reduction in genome size 2Evolution can cause a rapid reduction in genome size 3USC research shows critical role of placenta in brain development 2Prenatal pesticide exposure tied to lower IQ in children 2Prenatal pesticide exposure tied to lower IQ in children 3Prenatal pesticide exposure tied to lower IQ in children 4
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, April ... Location: Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... nonprofit organization solely dedicated to finding a cure for hepatitis ... worldwide, will host its annual Crystal Ball on Friday, April ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider of ... regulatory, business, and media events in the United States ... former associate Virginia Cox , JD, is returning to the ... Virginia Cox re-joins 3D after more than two years of ...
(Date:1/14/2014)... The largest international professional organization of scientists ... derivatives thereof has endorsed an educational program that ... challenges of adulterated herb and botanical products. ... The Society for Medicinal Plant and Natural Product ...
(Date:1/14/2014)... January 14, 2014 In recent years, ... and methods in product development and promotion has led ... This mistrust, fueled by concerns about the insidious impact ... reports of spectacular fines to the world’s biggest pharmas ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... Session Highlights New Small Molecule Drug ... ... Inc.,(Nasdaq: ENMD ), a clinical-stage pharmaceutical company developing,therapeutics for the ... and mechanism of action data for,its selective kinase inhibitor, ENMD-2076. On ...
... (Nasdaq: IMRX ) today announced that it received ... that for the last 30,consecutive business days, the bid ... share. As a result, the company fails to comply ... forth in,Marketplace Rule 4310(c)(4)., In accordance with Marketplace ...
... SGN ) has confirmed that it has filed ... Officer, Dr. Lowell T. Harmison, has,scheduled a webcast on ... Harmison stated: "Now that Signalife has closed filing the,company,s ... I am pleased to provide direction on new contracts, ...
Cached Biology Technology:EntreMed's Kinase Inhibitor, ENMD-2076, Presented During AACR Special Session 2EntreMed's Kinase Inhibitor, ENMD-2076, Presented During AACR Special Session 3ImaRx Therapeutics Receives Notification from NASDAQ Regarding Non-Compliance with NASDAQ's Minimum Bid Price Requirement 2Signalife Announces Webcast 2Signalife Announces Webcast 3
Whole blood is collected from healthy guinea pigs of either sex from US source which are free of visible diseases at time of blood collection. Hemolytic titer: CH50 = 435 units...
...
... Designed for serial preparation ... fractions including cytosol/particulate/cytoskeleton/nuclear fractions ... these fractions can directly ... assays such as 2-D ...
Wheat Germ Agglutinin (WGA) PS SPA Imaging Bead, 2 g. Category: Leadseeker Beads....
Biology Products: