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Life on ancient Mars sounding more likely

Old 04-14-21, 11:38 PM
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Seattle Forrest
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Life on ancient Mars sounding more likely

There's evidence Mars went through a "great oxygenation event" where its atmosphere went from essentially no oxygen to enough to rust. On earth, this was caused by life discovering photosynthesis. There's no other known way for so much O2 to accumulate in a planet's atmosphere. Assuming they're correct. Big grain of salt at this point.

​​​​​​Many people are aware that Mars is cold and dry now, but ~ 3.5 billion years ago, it was warmer and wetter. It was warm enough to allow the formation of river channels, lakes, and minerals that formed by interaction with water. Scientists who have used mathematical models to constrain the conditions of an early Martian atmosphere, have concluded that greenhouse warming occurred, but they also concluded from their models that the greenhouse must have included reduced gases rather than carbon dioxide, implied that a reducing atmosphere might have existed. Yet until now, there has not been any evidence that the reducing atmosphere of early Mars actually occurred. This work indicates that it did exist.

Assistant Professor Dr. Ryan MCKENZIE from Research Division for Earth and Planetary Science is also impressed by these findings. “This is a rather remarkable study with findings that will significantly impact how we understand the early evolution of terrestrial planets and their surface environments. The transition from a reducing to oxidizing atmosphere on Earth ~2.5 billion years ago was only possible because of the existence of life, as oxygen is a waste product of metabolic processes like photosynthesis. Without microbes producing oxygen, it would not accumulate in our atmosphere, and we could not be here. While there are certainly differences in the local conditions Mars and Earth have been subjected to during their evolutionary histories, my mind can’t help but start thinking about what Jiancheng’s results may mean for a potential early Martian biosphere,” Dr. McKenzie remarked.

https://scitechdaily.com/planetary-scientists-discover-that-mars-underwent-a-great-oxygenation-event-billions-of-years-ago/amp/
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Old 04-15-21, 07:04 AM
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Then there maybe hope in finding John Carter and friends after all?
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Old 04-15-21, 08:10 AM
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Originally Posted by roundypndr View Post
Then there maybe hope in finding John Carter and friends after all?
as dust.

Then again... who knows... maybe as Morlocks, living deep underground... where the water hides.
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Old 04-15-21, 08:31 PM
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Old 04-16-21, 07:32 AM
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Originally Posted by Hondo Gravel View Post
Yesterday, I was just thinking about that very same image, but only it was second in line......my first image was that of Home Depot.
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Old 04-16-21, 07:51 AM
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Starbucks.
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Old 04-16-21, 09:29 AM
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Originally Posted by Hondo Gravel View Post
Do they sell pet rocks?
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Old 04-20-21, 12:53 PM
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This is a good story to read in celebration:

https://lasp.colorado.edu/home/mop/f...ear-picnic.pdf
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Old 04-20-21, 01:49 PM
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Originally Posted by Zedoo View Post
Starbucks.
. . . closely followed by an Amazon Fresh grocery store (very few employees needed).
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