Sunday, 14 August 2022

 

 

LATEST NEWS Australian legend Ian Chappell calls time on his career inside the commentary box Since 1917, Jharkhand's Tana Bhagats have been worshipping the Tricolour daily One thing that stands out is how Rohit Sharma backs players who aren't performing: Parthiv Patel Since 1917, Jharkhand's Tana Bhagats have been worshipping the Tricolour daily This drug can fight more than 300 drug-resistant bacteria Madonna Sebastian to appear opposite Tovino Thomas in 'Identity' Australia plans to increase migrant intake amid skill crisis A Rajasthan Royals owner slapped me three or four times, says Ross Taylor in his autobiography PM pays homage to all those who lost their lives during Partition Saumya Tandon urges fans to help late 'Bhabiji' star Deepesh Bhan's family repay loan No Olympic future for CWG lawn bowls 'trailblazers', squash players Honour freedom fighters by flying the National Flag, says Rajinikanth Vijay Sethupathi's team clarifies: Actor not a part of 'Pushpa 2' AAP's expanding its national presence at a rapid pace after Punjab victory Birmingham 2022 successes could mark the start of a new era in Indian athletics Simona Halep moves into Toronto final; set to enter Top-10 in latest WTA rankings For wife Mila Kunis, Ashton Kutcher with moustache was 'like a different guy' TOPS has given a different 'spin' to sports in India, says Mansher Singh India's Covid tally declines to 14,092 cases, 41 deaths 13 killed, 5 injured as truck falls over bus in Pakistan Elon Musk hopes for a self-sustaining city on Mars in 20 years

 

Evidence of life on Mars may be over 6 feet deep : NASA

NASA, National Aeronautics and Space Administration, Washington

Web Admin

Web Admin

5 Dariya News

Washington , 28 Jun 2022

Rovers exploring Mars, such as NASA's Curiosity and Perseverance and others, may have to dig about 6.6 feet (two metres) or more under the surface of the Red Planet to find signs of ancient life, according to a new laboratory experiment by the US space agency.

It is because ionising radiation from space degrades small molecules such as amino acids relatively quickly, NASA said.Amino acids can be created by life and by non-biological chemistry. However, finding certain amino acids on Mars would be considered a potential sign of ancient Martian life because they are widely used by terrestrial life as a component to build proteins that are essential to life.

"Our results suggest that amino acids are destroyed by cosmic rays in the Martian surface rocks and regolith at much faster rates than previously thought," said Alexander Pavlov of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in a statement.

"Current Mars rover missions drill down to about two inches (around five centimetres). At those depths, it would take only 20 million years to destroy amino acids completely. The addition of perchlorates and water increases the rate of amino acid destruction even further," he added.

Twenty million years could be a relatively brief amount of time because scientists are looking for evidence of ancient life on the surface which would have been present billions of years ago when Mars was more like Earth.

This result suggests a new search strategy for missions that are limited to sampling at shallow depths.Scientists have been exploring if life emerged on Mars by examining Mars rocks for organic molecules such as amino acids.

In the study, published in the journal Astrobiology, the team mixed several types of amino acids in silica, hydrated silica, or silica and perchlorate to simulate conditions in Martian soil and sealed the samples in test tubes under vacuum conditions to simulate the thin Martian air.

The samples were blasted with various levels of gamma radiation a type of highly energetic light to simulate cosmic-ray doses up to that received from about 80 million years of exposure in the Martian surface rocks.

The experiment is the first to mix amino acids with simulated Martian soil. "It turns out that the addition of silicates and particularly silicates with perchlorates greatly increases the destruction rates of amino acids," said Pavlov.

While amino acids haven't been found on Mars yet, they have been discovered in meteorites, including one from Mars. But as Martian meteorites typically get ejected from depths of at least 3.3 feet (one metre) or more, it is possible that the amino acids in it were protected from cosmic radiation, the team said.

 

Tags: NASA , National Aeronautics and Space Administration , Washington

 

 

related news

 

 

 

Photo Gallery

 

 

Video Gallery

 

 

5 Dariya News RNI Code: PUNMUL/2011/49000
© 2011-2022 | 5 Dariya News | All Rights Reserved
Powered by: CDS PVT LTD