shindleria

shindleria t1_j1eijbh wrote

Exactly. We also have to consider how advantageous Earth's moon has been to our existence. When photosynthetic life evolved, the Moon was much closer than it is today and had a considerable effect on oceanic tides compared to the present day. The Earth's rotation was also faster, the planet was cooler, and the overall landmass was smaller and closer together. The result was few shallow seas but strongly affected by lunar-driven tides, providing just enough safe habitat for these oxygen-producing organisms to outlast what was arguably life's greatest mass extinction on this planet to date.

Without a moon like Earth's, or plate tectonics to alter martian landmass, Mars's biosphere lay at the whim of volcanism, hydrogeologic forces and impacts. If there was an oxidation event like ours there was no variability in global ocean levels for any organisms occupying the land-ocean border region to find "short-term" refuge execpt by glacial forces or rainfall. On a geologic timescale, any relatively large event in the midst of a rapid change to atmospheric chemistry by photosynthetic oxygenation would have been game over for life on Mars. Any chemosynthetic organisms such as those on Earth which thrive deep underground, by hydrothermal vents and other thermophiles could have a chance of survival until the ocean vanished and sealed life's fate on the planet. It remains to be seen whether we can find anything near the surface or deeper underground where life may still cling.

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shindleria t1_j1abbfv wrote

We have to thank extensive evolution, nearly half the age of our planet, for the life forms that relinquished molecular oxygen that constitutes our current atmosphere. It’s possible Mars underwent a parallel evolution of microorganisms but their great oxidation was truly a dead end mass extinction from which life on that planet never recovered.

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shindleria t1_iyf6jyz wrote

After seeing extensive footage of what had just taken place in the Indian Ocean I was never going to venture out that far, and believe me I had my eyes on the ocean the entire time looking for any disturbance in the distance that resembled an incoming wave.

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shindleria t1_iyevr6u wrote

I happened to be on the opposite side of the planet when this happened (in the Caribbean). The following day the water receded drastically like an extremely low tide and I was able to walk along exposed reef that seemed to go for miles along the coast. I figured it was a consequence of so much of the ocean being displaced and was sloshing around the planet, combined with the usual tidal flows. I’m curious to know if anyone else experienced this.

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shindleria t1_itcdc2e wrote

After cutting added sugar from my diet (ie. black coffee vs. cream and sugar) i could no longer tolerate the taste of certain foods like ketchup because they became too sweet.

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shindleria t1_ir9o4sp wrote

Mt genes have been doing this for billions of years to become fully integrated into cellular signalling processes. Many of the mRNAs have 5’UTR sequences which confer unique trafficking and translation pathways, essentially a privileged form of molecular communication between the cell and mitochondria to control energy expenditure within the cell under a vast array of conditions. Some viruses have evolved to mimic these genetic properties to continue protein synthesis when the cell attempts to arrest translation. Truly fascinating.

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shindleria t1_iqyap20 wrote

Wouldn’t landing rockets on an impactor and over time send any additional fuel toward it be a more effective method? Turning the object into a movable, steerable body would ease it safely out of its orbit rather than blow it to pieces and send fragments that could still pose a threat to the planet.

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