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Life Might Have Liked Parts Of Ancient Mars

While there's still no evidence that life evolved on Mars, we now know that it at least could have.

Artist's rendition of NASA's Mars Science Laboratory spacecraft nearing the red planet

Photo: NASA/JPL-Caltech (flickr)

The Curiosity rover touched down on the Red Planet in August, 2012.

After years of planning, engineering, travel, extraction and analysis, the Curiosity rover has accomplished one of its primary missions. Incredibly, it’s found evidence that our neighbor planet, Mars, may once have been habitable!

4 Billion Years

Judging from soil samples collected by the Curiosity rover, it appears that within the last 4 billion years (the timeframe in which life has emerged and evolved on Earth) the same conditions that supported life on our planet also existed on Mars.

The samples were gathered in a region known as Yellowknife Bay, which, if the analysis is correct, was the location of a lake for anywhere from hundreds to tens of thousands of years.

The Mars research team is comprised of scientists from a range of specialties and published this and other findings from the Curiosity rover in a series of six papers that were released on December 9, 2013.

Habitability

So what exactly would have made the now formidable landscape of Mars inviting to life long, long ago?

According to the papers, a few key elements, some moderation and energy sources would all have been necessary. And, as it turns out, all were present. The environment was neither too hot or too cold, nor too acidic or too basic.

In addition, the soil samples show that carbon, hydrogen, oxygen, sulfur, nitrogen and phosphorous were present, as was an energy source common to rock-eating microbes found on Earth: a mix of sulfur and iron minerals able to exchange electrons.

It’s not exactly be fine dining, but you’ve gotta start somewhere.

Read More:

  • NASA Rover Results (NASA)
  • A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars (CalTech)
  • Research confirms Mars once had conditions to support life (Indiana University)
Kayleigh Burgess

Kayleigh Burgess is a graduate student at Indiana University, studying journalism and sustainability. When she's not writing, reading and analyzing, you can find her in the kitchen making a feast or outside exploring. She is excited to keep her curiosity kindled by contributing to A Moment of Science.

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