FlattopMaker

FlattopMaker t1_jedc15a wrote

When the pH on the tooth surface becomes acidic, the enamel starts to demineralize so your tooth is more susceptible to bacteria. Fluoride in the mouth enhances remineralization of the enamel using the calcium and phosphate ions in the saliva. There's different sources of oral fluoride. Stannous fluoride in certain toothpaste gels sticks to the enamel surface. It's supposed to be stop bacterial proliferation > biofilm > plaque and kill bacteria. Sodium fluoride works better in a toothpaste because it is more abrasive.

In Europe there's biomimetic hydroxyapatite to create a new layer around teeth to harden the existing enamel so fluoride or lack thereof isn't as big a deal.

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FlattopMaker t1_je5275q wrote

> For instance, my wife and I both graduated the same year. However, I'm 11 months older than her, because the cut-off in the state she's from was different than the state I'm from. So she, at almost a year younger, started school a year earlier than I did. One of my best friends in school moved to my school at the end of grade school, from out of state. He was in our class because the cut-off in his home state was earlier than our state. He's two months older than I, and a full year and a month older than my wife. So that's three different people, with wildly different birthdates, all in the same class. And at the younger ages, especially kindergarten and first or second grade, even a couple of months makes a huge difference in mental capacity for a child.

This. The grade one is assigned to is a system carried over from the 1800s and does not reflect what we know of child and brain development today, or critical social and physical development needs to realize every child's potential.

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FlattopMaker t1_jdywcqn wrote

No other creature in the fossil record or recorded alive at any point in time can throw like a human and fashion tools to throw like a human with that curved and fragile radius and fragile shoulder held together by ligaments and tendons. It's not just the standing and the walking, the back pain, and the twisting foetus for birthing - the tool use outweighed the disadvantages. Cave guys standing up and bumping in to the stone shelf to grab the good cave drawing soot cursed but kept the verticality.

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FlattopMaker t1_jdtqmfz wrote

Gun Fu is a new style and type of filmmaking, and in that sense the genre has changed filmmaking and movies. John Wick happens to be at the forefront of Gun Fu. I get the writer and editor had an assignment to promote John Wick 4, but they should've picked different content to do that because the article actually does Gun Fu as a genre a disservice. I don't find the John Wick world-building to be that deep even taking into consideration the upcoming spinoffs, unlike Guillermo del Toro's stuff, LoTR, Harry Potter, etc.

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FlattopMaker t1_jdt9cmi wrote

The magnetic field both causes and impacts the rate and most development as evidenced by magnetosomes in the fossil record and organisms today. Some species exhibit greater function in hypomagnetic conditions, and may have evolutionary impact when combined with known mutagenic effects of radiation exposure. We don't have known mechanism of action identified yet for the HMF (hypomagnetic field) theory and observations. Link to a review of speculations about causes and effects relating the magnetic field to the Cambrian explosion.

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FlattopMaker t1_jdppqhu wrote

Publishing: my current view is stratified text ['AI' and 'content' can mean many things so I prefer not to use the terms due to very different understandings] can be published and sold by a software company or an influencer or any individual under a different and new cataloguing system other than ISBNs and ISSNs, such as an expanded Digital Object Identifier (DOI). Copyright laws require urgent review to account for digitization and stratified text.

Rationale: It was once the fashion (and it has become fashionable again) to publish semi-fiction mashups that consist of excerpts of already published works compiled with critique and fiction narration. To be clear, these mashups are not anthologies or collected works but it a literal mashup of different published works with text added. Some will say what does it matter whether it was created through a typewriter, a Word processor, an AI or other tool, as long as the final product is enjoyed by the intended audience? The difference is that organic human folklore and cultural change and part of human evolution and humans connecting to other humans. Stratified text is human-authorized but should not be claimed to represent human culture.

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FlattopMaker t1_jdpl1o2 wrote

Replying to my earlier post because the we-can't-see-the-decayed-structures-that-were-made-from-trees is speculation extrapolated from history. Greeks started out with temples made of trees. The vertical lines/grooves of the stylized marble columns we are left with were made to mimic tree trunks. The Egyptians started out with leather and chests for crypt or burial funerary goods made from real animal hides and real wood. As materials became more scarce, faux leather was used and wood grain-like grooves made from woven reeds for the chests that we're left with.

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FlattopMaker t1_jdpj6bs wrote

Larger groups of people to create and cooperatively share or use the built environment, yes. This requires communication of a certain mutual sophistication. But it does not mean necessarily they were all living together, all the time. We have churches standing today that have taken hundreds of years to build from start to finish. This is even with dense populations, the technology, tools and know-how to construct it in a particular style. Many intervening events delayed the build.

What the changes were that led to larger cooperation, presumably over long spans of time across dozens of generations, are where historical record meets speculation. Some agroforestry researchers believe balanophagy (acorns as the main dietary source of calories and nutrients) declined as demand for trees for other uses became prevalent, which pushed the rise of the less-nutritive and more effortful agriculture. Numerous other options have been suggested. Perhaps structures were initially created from trees for thousands of years before megaliths became the norm.

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