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Showing content with the highest reputation on 05/13/22 in all areas

  1. The oceans it would seem have a lot of weight that bare down on the Earth's crust, what effect if any do this have on the crust? Also, did the oceans play a role in the creation of the Earth's tectonic plates?
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  2. According to this, you should be able to find "moon dust" with enough potash to grow plants. But without combined nitrogen you are stuffed. https://sites.wustl.edu/meteoritesite/items/the-chemical-composition-of-lunar-soil/
    1 point
  3. I did not understand if they added water to the soil or not? (btw, I would be more interested about an experiment to check if lithoautotrops can live there - but I guess it could take a long time to check it)
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  4. It struck me the same way. Back in 4th grade we sprouted seeds on wet paper towels. They also started to look bad after a while.
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  5. As @Sensei said, regolith is not a true soil. Google: "why is regolith not a true soil" https://en.wikipedia.org/wiki/Regolith Even on Earth, where molecular nitrogen is very abundant in the atmosphere, we need nitrogen-fixing bacteria. Only physical processes and few and very special organisms can break the N2 triple bond. I suppose @Genady's picture is correct that, once the nutrients from the seeds run out, the plant cells simply didn't find the nitrogen to synthesize their proteins and nucleic acids. I would assume lunar regolith is poor in phosphorus too, but I'm not sure. Interesting news.
    1 point
  6. Good questions to ask creationists concern children. If there was a creation, why did the creator create no children ? Why do chilren 'grow up' ? What is the difference between evolving and growing up ? Why are children in general and the children that were reported after the creation different from their parents?
    1 point
  7. https://www.google.com/search?q=moon+soil+chemical+composition Nitrogen is not on the list of elements.. "The bulk chemical composition of lunar dust varies across the lunar surface, but is about 50% SiO2, 15% Al2O3, 10% CaO, 10% MgO, 5% TiO2 and 5-15% iron (Table 1), with lesser amounts of sodium, potassium, chromium, zirconium." On Earth, nitrogen compounds found in soil are produced during lightning strikes and by nitrogen-fixing microorganisms.
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  8. So, up until about day six the plants used nutrients and organic matter stored in the seeds, and used the soil just to hold to something. After that, the plants needed more from the substrate and then "discovered" that something is missing. I'd guess that botanists know what is missing. I read this news and couldn't understand what was so astonishing, what did they expect, what new knowledge have they obtained...
    1 point
  9. It's a minor effect in comparison to volcanism, only noticeable at the time-scale of hundreds of millions? billions? of years. A part of the water gets recycled to the atmosphere as you say, but a small fraction is incorporated as hydrous minerals, from what I know. I think this is the original find: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GC008232 Does that check with you? I'm very interested in learning what you think.
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  10. The total mass of the oceans slightly depresses the equilibrium level of the oceanic plates, thereby slightly increasing the underlying mantle pressure sufficient to raise the less dense continental plates by an (approximately) equivalent degree. The causal factors for the onset of plate tectonics, and its timing are currently major open questions. As @exchemisthas noted, it seems entirely plausible for the oceans to have supplied some chemical and lubricative effects to facilitate the process. As they still do.
    1 point
  11. I understand your position. Society though does not wish opioids to be legal, and there are a limited number of people who wish to make safe spaces legal. Those who do wish safe spaces to be legal are simply being realistic. They know people will do illegal drugs and are simply trying to mitigate the risk that addiction poses to their friends and family. I have had several family members who were addicted to various drugs. No one wanted them to quit doing drugs more than they themselves. I would have allowed them to do drugs in my house if it meant they had a better chance of surviving long enough to finally kick the habit. One of them only lived because his mother was able to get a dose of naloxone for him, no questions asked. I'm not saying your position is not valid, but if your goal is risk reduction, then safe places are a solution that achieves that goal.
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  12. Great stuff! hope some of our anti relativists are taking note. That's the way I read the report also. The following is an interview with Professor Katie Bouman. Bouman spoke with AFP shortly after the breakthrough announcement. https://phys.org/news/2022-05-milky-black-hole.html Why was it harder to see Sagittarius A*?— "We collected the data for both M87* and Sgr A* in the same week in 2017, but it took us so much longer to make a picture of Sgr A* than M87*. "Sgr A* has a lot of other things that are going on that make it a lot more challenging for us to make an image. We're actually observing the black hole through the plane of the galaxy. And that means that the gas in the galaxy actually scatters the image. It makes it look like we're looking at the black hole through, like, a frosted window, like in a shower. That's one challenge. "But I would say the biggest challenge that we face is the fact that the black hole is evolving really quickly. The gas in M87* and Sgr A* is moving at roughly the same speed. But whereas it takes days to weeks to make a full orbit around M87*, for Sgr A*, it's evolving from minute to minute."
    1 point
  13. Um, isn't it obvious how long an immortal lives?
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  14. Indeed, here's another -1 for your collection; the sad thing is, despite that and all the reasonable argument's presented, you can't even concieve of the possibility that you may be wrong. So instead you condemn everyone that doesn't conform to your standard's, presumably including your loved one's.
    -1 points
  15. OK, accepted. Government laws and prohibitions are necessary for any society to succeed and beneficial. I would have though that was obvious, but of course sometimes people are just blinkered. Let me count the ways...traffic laws and prohibitions, DUI, compulsory super, compulsory health levies etc etc etc. As usual you are playing games and being condescending. The statement stands. The only unworkable societies are the one's you pretentiously push, over a few threads, as amply shown. Except you twist the meanings to suit your own agenda. I fully understand the dangers of excess alcohol drinking and the need for education. You also despite your pretense, should understand the acceptance of alcohol being a social necessity in all forms of life.
    -1 points
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