Dinosaur extinction: roasted alive at 800 ° C
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Christophe
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I looked on A5 past 2 times, but your load is very big 700Mega. We can compact more without reducing the quality 400 mega, or even 200, since I record this type of nice show of basic recent knowledge to know. !!
Otherwise it is the minimum to know about our origins and our life.
Much remains to be discovered, like the traces of multicellular life that preceded the 600 million year glaciation.
Multicellular life seems rather improbable because it requires a lot of conditions on the planet, (moon required), oxygen, harmful waste at the start, which oxidized the earth's iron for 2 billion years before seeing its concentration finally increase, etc. .. !!
Otherwise it is the minimum to know about our origins and our life.
Much remains to be discovered, like the traces of multicellular life that preceded the 600 million year glaciation.
Multicellular life seems rather improbable because it requires a lot of conditions on the planet, (moon required), oxygen, harmful waste at the start, which oxidized the earth's iron for 2 billion years before seeing its concentration finally increase, etc. .. !!
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Obamot
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you can also note in the equation, that the abundance of food has always preceded the emergence of "new" forms of life, at least on Earth ...!dedeleco wrote:I looked on A5 past 2 times, but your load is very big 700Mega. We can compact more without reducing the quality 400 mega, or even 200, since I record this type of nice show of basic recent knowledge to know. !!
Otherwise it is the minimum to know about our origins and our life.
Much remains to be discovered, like the traces of multicellular life that preceded the 600 million year glaciation.
Multicellular life seems rather improbable because it requires a lot of conditions on the planet, (moon required), oxygen, harmful waste at the start, which oxidized the earth's iron for 2 billion years before seeing its concentration finally increase, etc. .. !!
This is why if we apply this model to the expansion of life in our solar system, it has almost no chance of emerging "naturally" at a horizon counting in millions of years. If not in the depths in primitive forms and in a stable environment, without too much pressure. Very rare!
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The appearance of cyanobacteria with photosynthesis 2,7 to 2,5 billion years ago is due to what an abundance of new food, the CO2 present already spent 2 billion years ?????
They made the oxygen flush all the CO2, triggered an enormous snowball entire glaciation of the earth 2,5 billion years ago, and had to make oxygen for two billion years still in oxidizing the iron of the rocks for finally another snowball and finally having the O2 food waste to breathe in large quantities finally !!!
In fact the chance to make a photosynthetic system complex (not yet understood and reproduced) took 2 billion years to be realized by evolution and chance !!!
Finally, this long past shows how the oxygen of our earth is precious and to be preserved, much more than the CO2 problem, by preserving the lives and bacteria that make it !!!!
They made the oxygen flush all the CO2, triggered an enormous snowball entire glaciation of the earth 2,5 billion years ago, and had to make oxygen for two billion years still in oxidizing the iron of the rocks for finally another snowball and finally having the O2 food waste to breathe in large quantities finally !!!
In fact the chance to make a photosynthetic system complex (not yet understood and reproduced) took 2 billion years to be realized by evolution and chance !!!
Finally, this long past shows how the oxygen of our earth is precious and to be preserved, much more than the CO2 problem, by preserving the lives and bacteria that make it !!!!
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Obamot
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They needed to emerge and survive, either: sugars (chemoheterotrophy) or hydrogen sulfide (anaerobic) + Co2. So necessarily that all the elements we are talking about were available in abundance, at least as precursors of life. There you would not be talking about anything else that could also happen to humans on a large scale: a proliferation that leads to a phenomenon of rarefaction.
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What I always have trouble grasping is how we went from the inert to the living. Why and how bacteria appeared
Le mystery still remains total with more experimental info, possible life in incredible conditions, hypotheses, as possible life with RNA alone, its own catalyst, and possibility of life from space born long before the earth !!!
Also, multitudes of parallel universes, consistent with quantum mechanics with all kinds of physical laws, and we are in a universe where life is possible, to realize it after 13 billion years of evolution !!
Like this all possibilities have been tried by nature, like we show it quantum mechanics, which explores all possible paths and stories (Feynman diagrams, etc.) !!
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New info from sediments and oxygen was sorely lacking 499million years ago:
Oxygen's challenge to early life
http://www.physorg.com/news/2011-01-oxy ... -life.html
Reason more than preserve oxygen by not disturbing life too much, which renews it, or by burning it too much !!
The Gulf of Mexico and Chesapeake Bay are already oxygen-free !!
Oxygen's challenge to early life
http://www.physorg.com/news/2011-01-oxy ... -life.html
Reason more than preserve oxygen by not disturbing life too much, which renews it, or by burning it too much !!
The Gulf of Mexico and Chesapeake Bay are already oxygen-free !!
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