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Showing content with the highest reputation on 01/04/23 in all areas

  1. I don't but I do have a problem with people who mischaracterize the issue by subtilty suggesting that all a person would have to is wake up one morning and identify as female so they can ogle young girls in the changing room.
    2 points
  2. Can't put my finger on why, but I keep thinking of the old adage that we shouldn't sacrifice the good in pursuit of the perfect
    1 point
  3. Some of us just find it courteous to simply accept them as a female teacher and recognize that doing so inflicts no harm to others or to their kids… but us refusing to let go of the male label does, in fact, do measurable harm to that teacher, and also the broader lack of cultural acceptance provides a permission structure for the more unhinged among us to attack and carry out violence against them since they’ve been dehumanized so much that some see them as no different from rats and vermin. It’s just a female teacher. That is all. No need for any special tap dancing, torches, nor angry chants… which also happen in local school board meetings when they’re not trying to ban books or advocate against vaccination during global pandemics.
    1 point
  4. Thank you sir! I understand where your coming from. Sorry my brain wasn't working before.
    1 point
  5. Genady has a point. Gravity causes planets,etc. to form because regular matter interacts electromagnetically. Collisions, friction etc. is a result of this electromagnetic interaction. A secondary result of this interaction is the production of electromagnetic radiation. The production of this comes at the expense of kinetic energy from the matter involved. Two particles collide, emit some EMR and separate, but at a slower speed than they met at. This happens enough and a clump of matter of matter forms. DM does not interact electromagnetically, not only does that mean it doesn't "collide" like regular matter, but it doesn't have the same mechanisim to shed KE. A DM particle can approach a planet, pass right through it, and fly off with the same speed it started with. There's is nothing to hold it in the vicinity. Having said that, There are ways for DM to clump. Gravitational interactions can cause such distributions. But compared to electromagnetic interaction, they are very,very, very, weak, and produce results much slower. The Universe just hasn't been around long enough for small compact collections of DM to form, Just much, much larger and diffuse collections like galactic halos.
    1 point
  6. It may go better for societies if all social reform is recognized as experimental in nature. If education allowed people to recognize the complexity of modern societies, and that the success of any proposed alteration is not guaranteed. (This might also reduce the utopian expectations of some)
    1 point
  7. The first thing to keep in mind is that while 90% of the mass of our galaxy is estimated to be dark matter, This includes the entire DM halo or a spherical volume that extends well beyond the visible matter disk of the galaxy. Once you spread it's mass throughout that huge volume, you end up with an extremely low density. The other thing is that even though, if you were to take the total mass of the solar system and spread it out evenly throughout a spherical volume enclosed by Neptune's orbit, you would end up with a overall density that would put a man-made vacuum to shame, it would still be many many times denser on average then, say, a 10 parsec radius sphere in our part of the galaxy. And that 10 parsec sphere would, still contain more regular matter than DM. It is estimated that the total mass of DM in the Solar system is equivalent to that of 1 small asteroid. Even a 10 fold increase in this density would be insignificant gravitationally to the Solar system. If this is the case, then how is it that DM can cause discrepancies in the rotation curves or galaxies? The visible matter in galaxies like the Milky Way is concentrated in its central bulge and thin disk. So if you calculate orbits based on visible matter, you need to take this distribution into account. DM however, is spread out spherically, and the vast majority is "above" and "below" the galactic disk. And any mass closer to the center of the galaxy than a given star, has a gravitational effect on that star's orbit around the galaxy. So, for example, if we take that 1 small asteroid's amount of mass spread out throughout the Solar system, and apply that density to the volume of the sphere contained within the Sun's galactic orbit, you get a total mass of DM that is a significant fraction of the total mass of the visible mass of the Milky way; enough to have a noticeable effect on the Sun's galactic orbit. The upshot is that star systems like the Solar system are "matter rich dense spots", which makes their internal orbital mechanics essentially immune to the kind of DM density variation likely to occur.
    1 point
  8. I've got some background in environmental sciences, and the very first thing you need to "green" anything is water retention and stable substrate. Shifting ground and water evaporation will greatly impede and plants trying to grow in an area. An oasis is a place where there is a large collection of protected water thanks to local geological structures. They're usually natural springs or wells from the water table below the desert sand. Plants require a place to root and annually reliable soil. Simply watering the sand isn't going to be enough. Wind erosion is also a major hurdle for plants. Some can withstand flat, open lands with full sun and arid temperatures, but not the kind that will create a forest. The Dust Bowl in the United States was a good example of this. Rich soil is created by lots of organic matter. The best way to create more forest against a desert is to start on the edge and keep building ecologically sustainable areas inwards. That might mean digging wells or creating large ponds and lakes to hold what little rainfall there may be. I know there are people that use something called 'swales' to do this. https://naturalbuildingblog.com/greening-us-deserts-80-year-old-swales-near-tucson-arizona/ If you want to create a lasting forest, it has to be able to survive after the initial human intervention. There are a lot of other factors, too, such as which plants to grow in that area (you want hardy, native, 'foundation' species to begin), but you definitely want to work with nature rather than against it.
    1 point
  9. t doesn't change the fact that some of mankind's earliest societal structures that led to civilization were based on religion. It did have some use; even if only to control our animalistic and instinctive anti-social urges.
    1 point
  10. https://theconversation.com/5-senses-in-fact-architects-say-there-are-7-ways-we-perceive-our-environments-193179 Some think there are more
    1 point
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