[Cyclopath]

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. Big grain of salt at this point though. 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/

[Chief Joseph]

Interesting theory, although likely impossible to prove. I know this is not a popular opinion, but imo space travel is a huge waste of money, but I suppose given the vast amount of money that is wasted, it's a drop in the bucket.

[Malachai Constant]

Mars was the genesis of life in our solar system, DNA came from extraterrestrial meteorites, and grew. As earth cooled termites from Mars seeded earth. Mars then withered prove me wrong.

[cdestroyer]

humans did not begin here on earth! prove ME wrong!

[Cyclopath]

Ok. What do you think could fill a while planet's atmosphere with oxygen other than living things?

[coldrain108]

[Chief Joseph]

[Anne Elk]

[cdestroyer]

oh boy! here we go! religion!!

[Chief Joseph]

[Ski]

Of course there was life on Mars! Any dummy knows that! And James Churchward was right - there most certainly was a huge continent of Mu in the Pacific Ocean, and Pytheas of Massalia provided irrefutable evidence of the island of Thule. You people just need to change the channels you're watching and get away from that "conspiracy theory" nonsense.

[Cyclopath]

[Chief Joseph]

[Pyrites]

Mu? As in, it was inhabited by the Muons. Back to your hootch of choice.

[Ski]