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Cake day: June 9th, 2023

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  • Sonori@beehaw.orgtoScience Memes@mander.xyzDark Matter
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    9 days ago

    To expand on this, we also have mapped it out and know that the amount of dark matter varies wildly between galaxies, with some having basically none while others have far more dark matter than observable matter in them. There’s also a lot of stuff with the early universe that only works if you have something with gravity that doesn’t otherwise interact significantly with matter.

    As Angela Collier puts it, dark matter is not a theory, it is a set of observations.



  • Mass Transit and walkable cities are a lot of things and has a lot of benefits that makes it worth expanding, but they are not an full climate solution or anything like a replacement for electric cars.

    Neglecting that even in small very dense countries with cities built wholly around high quality mass transit still have freeways and millions of cars, the facts that it almost always takes over a decade of construction to establish a new light rail or metro line in north america, that it takes many such cycles to fully build out a network, and that it can take years to even establish a simple bus line, mean that it cannot be built fast enough to be relevant to anything under a 2.5 to 3 degrees warming senecio at best.

    We quite similarly don’t have the carbon budget to keep emiting two tons of carbon dioxide per year per vehicle for another half century while we wait for the best case where effective 24/7 transit with fifteen minute headways is extended to even the most conservative small town with politicians elected on culture war issues like eliminating public transit. Not when we have a nearly drop in solution that can be scaled up to the point where it can have eliminated nearly all personal transit related carbon emissions in the time it takes to build two stages of a single metro line.

    And I haven’t even touched on the infatuation north america has with diesel, battery electric, and even hydrogen buses over seeing trollybus or tram wires, or the sudden pushback and NIMBYism you see in even very blue cities in blue states like Los Angeles the second you start talking about connecting the rich white neighborhoods to the poor block ones, or that time the Koch brothers quashed a new light rail line a small North Carolina city had spent hundreds of millions working on to provent woke walkable cities, or the third of north amarica that doesn’t live in or near a city, or the infatuation that both the liberals and conservatives who control north america have with running public transport at a profit.

    Again, this isn’t to say that mass transit isn’t worth it or that we shouldn’t be building a whole lot more of it than we currently are here in north america, just that it is not something we should be expecting in time to reach net zero.

    Work from home is great and something that should be encouraged for a whole host of reasons, but it isn’t something that most jobs with an actual physical output or effect on the world can do.





  • “A computer can never be held accountable, therefore a computer must never make a management decision.”

    Even more importantly when it comes to assessing properly, machine learning, now referred to as AI, has been continuealy shown to not just repeat the biases in its training data, but to significantly exaggerate them.

    Given how significantly and explicitly race has been used to determine and guide so much property and neighborhood development in the training data, I do not look forward to seeing a system that is not only more racist than a post war city council choosing where to build new moterways but which is sold and treated as infallible by the humans operating and litigating it.

    Given the deaths and disaster created by the Horizon Post Office Scandel, I also very much do not look forward to the widespread adoption of software which is inherently and provablly far less accurate, reliable, and auditable than the Horizon software. At least that could only ruin your life if you were a Postmaster and not just any member of the general public who isn’t rich enough to have your affairs handled by a human.

    But hey, on the bright side, if Horizon set UK legal precedent than any person or property agent is fully and unequivocally legally liable for the output of any software they use, after the first few are found guilty for things the procedural text generator they used wrote people might decide its not worth the risk.