Comments by "EebstertheGreat" (@EebstertheGreat) on "Adam Ragusea"
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2:37 For those wondering, there are at least three commonly-used definitions of "plant" that include or exclude various types of algae. The strictest sense of the word "plant" (Plantae sensu strictissimo ) applies only to the land plants (Embryophyta), which are what we all normally think of as plants, even the simple plants like mosses and ferns, but none of what we would call "algae." A slightly less-strict sense of "plant" (Plantae sensu stricto ) applies not just to land plants but to all green algae (Viridiplantae), including stoneworts and a variety of (mostly single-celled) marine and freshwater algae. A broad sense of the word "plant" (Plantae sensu lato ) applies to not only green algae but also red algae and possibly glaucophytes (Archaeplastida). It's hard to find a well-known red alga, but basically, they are red in color, either single- or multicellular, alternate generations like plants, mostly live in the ocean, and generally don't form lichens with fungi. But most algae isn't plants in any sense! For instance, kelp is a brown alga from the SAR supergroup, only very distantly related to plants. And cyanobacteria are sometimes called " blue-green algae" even though they are prokaryotes.
The undifferentiated plant tissue he is referring to is called a "thallus," or "thalloid tissue." Even some non-plants have thalli, like the kelp I just mentioned. But many simple plants do too, and even a a few ore complex plants like duckweeds have thalloid structure.
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It's not really true that pigs are particularly closely related to humans. Pigs are artiodactyls, like deer, sheep, cattle, goats, camels, giraffes, and whales. Humans are euarchontaglires, like rodents, rabbits, and treeshrews. The difference is that pigs have short guts like humans, which makes them good models for some disorders related to the gut, and they are simply cheaper and easier to keep as lab animals than other large livestock. But it's definitely true that they can transmit H1N1 flu (and a few other types that occasionally infect humans), which was a big deal in 2009.
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"Zucchini" comes from the plural of zucchina (originally m zucchino), even though in English, we use -i for both the singular and plural. Zucchino is a diminutive form of zucca, meaning "the mature fruit of the marrow plant" (aka "marrow squash") . . . or also "pumpkin" or "squash." Zuchinni/courgettes are harvested early in the summer long before they are ripe, whereas when they are harvested in the fall, they are called "marrow." "Courgette" comes from the French, a diminutive of courge, which also means "marrow squash." Both these words (along with "gourd," "cucumber," and many others) ultimately come from Latin cucurbita meaning "gourd."
So in the end, both "zucchini" and "courgette" just mean "little gourd," but they came from Latin through different languages (Italian and French, resp.), making them a linguistic doublet.
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@oyuyuy I didn't say that evolutionary pressure wasn't real, I said that it didn't work the way you imagined. You are correct that in the past, food shortage and bacterial infection were major sources of mortality, and now they are not. That is why the selective pressures have changed. But other things, like viral infections, allergies, and low testosterone, certainly affect fitness. Instead of starvation, we now face obesity. Since obese people are less successful, that is a new evolutionary pressure.
Again, as long as some genotypes are more successful than others, we will continue to evolve. That remains the case. And as long as the environment is rapidly changing, we can expect rapid evolution. That is also the case.
And for what it's worth, people do still die from disease, famine, war, etc. Maybe they don't in your country, but that isn't the whole world. Moreover, since most of my discussion has been about the past ten thousand years, all of these in fact became far greater problems over this period than they had been in the past. Epidemics barely existed before dense civilizations, war was provincial at best, and famines were more common in some areas (places which eventually stored grain) but less common in others (places where monocultures were periodically ravaged by pests).
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@ewthmatth It's still acetic acid, but the acetic acid isn't made from fermented alcohol. Real malt vinegar is made by fermenting ale, while the "non-brewed condiment" is made by taking acetic acid and its other principle flavors and adding them separately, along with caramel color. It's an artificial malt vinegar substitute, sort of like how pure vanillin isn't real vanilla but tastes similar, because vanillin is the main flavor component of vanilla.
No one cares that it isn't technically malt vinegar, because they're just pouring it on chips at a cheap shop and aren't expecting some aged fancy vinegar anyway. But legally, it can't be called vinegar.
EDIT: One possible source for the acetic acid is fermentation of glucose by the anaerobic Acetobacter bacteria. Also, while I can't recall seeing this product in the US, the FDA has clarified that the law here is similar (though with Chevron overturned, who knows).
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@justaweeb1884 Microplastics are sizable particles of solid plastic. They do not dissolve in water, so they cannot possibly be excreted in any meaningful quantity in sweat. People confuse microplastics for their monomeric components like BPA, which is not the same thing. Just like solid chunks of cellulose are not the same as some dissolved glucose, microplastics are not the same as dissolved BPA. Moreover, microplastics are present in the water supply. If you sweat, that requires you to drink more water, meaning you will actually increase the microplastic concentration using this method (at least briefly).
As for metals, these are eliminated from the blood by the liver or kidneys (depending on the metal). They will be present in tiny quantities in sweat because they are slightly soluble in water, but they will also be present everywhere else in your body. You will eliminate hundreds of times more of the metals by just urinating, which is the other way that water is going to get out of your body anyway. Drinking a lot of water may slightly help remove metals, but that will be true whether you sweat or not. And of course, there are heavy metals in your water too (and no, you cannot filter those out).
The one thing that is proven to reduce heavy metal concentration is to avoid exposure, i.e. don't eat or drink things high in heavy metals. No matter what "detox" plan you try to follow, it will do basically nothing compared to just avoiding it in the first place. The one plate of fish you ate this week will have far more mercury than you will sweat out in your sauna detox or whatever.
And yes, this is backed up by every expert you consult. I don't mean SaunaHealthAndRealWellnessWithDrJimbo dot org, I mean actual credentialed experts. They aren't all in on a big conspiracy to keep lead in your blood or whatever, just saying what the research shows.
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@oyuyuy It's not about "more" or "less" pressure. That's not how evolution works. 50,000 years ago, humans were roughly in equilibrium with their environment. There was strong stabilizing pressure, meaning that any changes to the genome were selected against. So we barely evolved. Then, our environment changed dramatically, especially with the end of the last glaciation and the rise of farming and dense settlements. Suddenly, it was no longer important to be able to digest fibrous plants and much more important to be able to digest cereal and milk. So suddenly, there was destabilizing selection, and particular changes were selected for. So evolution picked up rapidly.
Evolution isn't about how hard life is. It's about whether some genotypes are more likely to reproduce than others. If everyone has similar genotypes and new mutations are selected against, then there is little evolution. If there is high genetic diversity or new mutations are selected for, then there is rapid evolution. That's true even if everyone lives to 150. It is simply a fact that some people reproduce more than others, so their genes by definition will be selected for. And if our society changes very quickly, than the genotype which is most successful will also change very quickly.
This isn't my opinion man. There are multiple articles about it. I recommend the paper by Hawks, Wang, Cochran, Harpending, and Moyzis titled "Recent acceleration of human adaptive evolution."
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