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We know lead hinders brain development, and makes us a little bit slower. Some have argued that leaded gasoline was responsible for reducing the iq of generations of people. It has now been a while since leaded gasoline has been banned worldwide.
Do we see any non-negligible difference in levels of intelligence in people before and after the lead ban?
(I know IQ is an imperfect measure of intelligence it is just one data point. And I use it for a lack of a better metric)
Why did we go from a Delta variant of COVID straight to Lambda? What happened to Epsilon, Zeta, Eta, Theta, Iota, and Kappa?NEWQ:show
According to this article there is now a lambda variant of COVID that is impacting people mostly in South America.
This of course is coming right in the middle of the Delta variant outbreak in the United States and other places.
In the greek alphabet, Delta is the 4th letter and Lambda is the 11th. So what happened to all the letters in between? Are there Epsilon-Kappa variants in other parts of the world that we just havent heard of?
If not, why did we skip those letters in our scientific naming scheme for virus variants?
eli5: Our saliva is the first stage of digestion and starts to break down food. Why does sucking our thumbs not break down our flesh?NEWQ:show
eli5: Our saliva is the first stage of digestion and starts to break down food. Why does sucking our thumbs not break down our flesh?
I kind of understand how a UPC code works, but how is a QR code capable of "storing more data"?
Is it safe to drink non-sugary drinks (like coke zero) while on a diet? Or do the artificial sweeteners just make you fat in some sneaky way?
What causes humans to have different sleeping types rather than just all having the same type of sleep?
eli5: What does zipping a file actually do? Why does it make it easier for sharing files, when essentially you’re still sharing the same amount of memory?NEWQ:show
eli5: What does zipping a file actually do? Why does it make it easier for sharing files, when essentially you’re still sharing the same amount of memory?
Is there any actual evidence to support the idea that foot fetishes are caused by a "cross-wiring" in the brain of genitalia and feet?NEWQ:show
I've heard countless people repeat to me that foot fetishes are "caused" by the proximity of a part of the brain that registers sexual behavior/arousal to one that registers feet, and if you google "foot fetish and brain" practically every result is some pop-science type description of this. It feels like the real answer would be a lot more nuanced, but I'm not seeing much pushback.
I know how we get sore throats (i.e. from viral or bacteria infections), which seems to be the only answers that come up when I try to ask this question online; what I'm curious about is the why. We get a cough to try and loosen mucus, we get a fever to allow the body/immune system to work more efficiently, but why do we get a sore throat? What purpose does it serve physiologically, if any? Or, is it a side effect of something else?