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Earth was like Mars? Experts find fossils in Greenland dating back to 3.7 Billion Years

Greenland stromatolites find can make Mars look even more promising than before as a potential abode for past life

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Allen Nutman (L) of the University of Woollongong and Vickie Bennet of the Australian National University hold a specimen of 3.7 billion-year-old fossils found in Greenland in Canberra, Australia, August 23, 2016. Picture taken August 23, 2016. Image source: Reuters
  • Stromatolites-fossilized communities of bacteria were supposedly found in south-west Greenland, these pre date fossils by 220 million years
  • There can be staggering implications of this find, one of them being a higher probability of life in Mars
  • The Earth was probably similar to Mars when stromalites started growing

September 1,2016– Fossils as defined in a dictionary are the remains or impression of a prehistoric plant or animal embedded in rock and preserved in petrified form. In simpler terms, fossils help us understand the existence of life that dates back to some billion years.

In recent news, the earliest fossil evidence of life on Earth has been found in rocks 3.7 billion years old in Greenland. This in way raises the chances of life on Mars aeons ago when both planets were similarly desolate, scientists said on Wednesday.

The experts found tiny humps, between one and 4 cm (0.4 and 1.6 inches) tall, in rocks at Isua in south-west Greenland that they said were fossilized groups of microbes similar to ones now found in seas from Bermuda to Australia.

If confirmed as fossilized communities of bacteria known as stromatolites – rather than a freak natural formation – the lumps would pre-date fossils found in Australia as the earliest evidence of life on Earth by 220 million years.

“This indicates the Earth was no longer some sort of hell 3.7 billion years ago,” lead author Allen Nutman, of the University of Wollongong, told Reuters of the findings that were published in the journal Nature.

“It was a place where life could flourish.”

Earth formed about 4.6 billion years ago and the relative sophistication of stromatolites indicated that life had evolved quickly after a bombardment by asteroids ended about 4 billion years ago.

“Stromatolites contain billions of bacteria … they’re making the equivalent of apartment complexes,” said Martin Van Kranendonk, a co-author at the University of New South Wales who identified the previously oldest fossils, dating from 3.48 billion years ago.

At the time stromatolites started growing in gooey masses on a forgotten seabed, the Earth was probably similar to Mars with liquid water at the surface, orbiting a sun that was 30 percent dimmer than today, the scientists said.

Those parallels could be a new spur to study whether Mars once had life, the authors said.

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“Suddenly, Mars may look even more promising than before as a potential abode for past life,” Abigail Allwood, of the California Institute of Technology, wrote in a commentary in Nature.

The Greenland find was made after a retreat of snow and ice exposed long-hidden rocks. Greenland’s government hopes that a thaw linked to global warming will have positive spin-offs, such as exposing more minerals.

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Nutman said the main controversy was likely to be that the fossils were in metamorphic rocks, reckoned to have formed under huge stress with temperatures up to 550 degrees Celsius (1,022°F) – usually too high to preserve any trace of life.

Still, Van Kranendonk told Reuters that dried-out biological material could sometimes survive such a baking, adding he was “absolutely convinced” by the Greenland fossils. (Reuters)

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    Why are we always talking about Mars? Why don’t we show interest towards other planets?

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NASA’s Future Scientists Would Likely Be Better Equipped To Study The Lunar Material

"By studying these precious lunar samples for the first time, a new generation of scientists will help advance our understanding of our lunar neighbor and prepare for the next era of exploration of the moon and beyond."

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NASA
Astronaut Harrison H. Schmitt collects lunar rake samples during the Apollo 17 mission, Dec. 13, 1972. VOA

NASA is once again turning its focus to the moon.

Nearly 50 years after the last lunar mission, the U.S. space agency is unsealing some of the samples brought back by Apollo astronauts for study.

The lunar samples were collected by astronauts during the Apollo 15, 16 and 17 missions.

Some of the samples have never been opened, others were resealed in an effort to preserve them.

space
“This exploration will bring with it new and unique samples into the best labs right here on Earth.” Pixabay

NASA has picked nine teams of scientists to study the samples. The teams were selected from scientists at the NASA Ames Research Center, the Bay Area Environmental Research Institute, NASA’s Goddard Spaceflight Center, the University of Arizona, the University of California, Berkeley, the U.S. Naval Research Laboratory, the University of New Mexico, Mount Holyoke College and the Planetary Science Institute.

NASA
The lunar samples were collected by astronauts during the Apollo 15, 16 and 17 missions. Pixabay

“By studying these precious lunar samples for the first time, a new generation of scientists will help advance our understanding of our lunar neighbor and prepare for the next era of exploration of the moon and beyond,” said Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate. “This exploration will bring with it new and unique samples into the best labs right here on Earth.”

Also Read: Microsoft Comes Up With Its App That Lets Users Explore Photos By Touch

NASA said its officials in the 1970s had the foresight to know that future scientists would likely be better equipped to study the lunar material. (VOA)