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  2. It most likely would have kicked-in in middle age with a generally weaker skeleton, which probably affected their strength/usefulness/longevity in pre-modern times. Modern medicine and relative affluence mitigates it now in first world societies.
  3. Best James Bond

    As MigL has observed, and as anyone who has been here a while might guess, I vote for Connery. (also concur with observations about Diana Rigg) The original list omits the oft-forgotten original Casino Royale with David Niven, since it's not considered canon.
  4. Hi I was interested to get some insights on how you would be able to instantly shatter an ice lattice. Instant instense heating of very cold glass for example will cause the lattice to break but i was interested why an ice lattice responds differently. Is there a temperature where it would shatter rather than melt? If not then why? I presume that a shattering can occur if a high intensity electrical impulse is applied to the lattice but I’m not sure how high the voltage would need to be or how it would respond. Does anyone know? And is there any way that the lattice can be shattered otherwise? Any insight by someone would be helpful. Many thanks.
  5. There's a huge gap between "be as healthy as possible" and "you are going to die" If you back a few hundred years, most of the population was malnourished in some way. They still survived. Humans have gotten taller over recent generations because of better nutrition, especially as children. But if you don't get your recommended dose of a particular vitamin one day, you don't immediately keel over.
  6. light and water

    No, not really. "'use' the same part of the electromagnetic spectrum" is not really a good way to describe what's going on. Water is pretty transparent, meaning there aren't a lot of absorptions in the visible part of the spectrum, but light will still reflect and refract light, and it will do so in other parts of the EM spectrum as well.
  7. Today
  8. light and water

    A basic question . . . do light and water interact because they 'use' the same part of the electromagnetic spectrum?
  9. Any genuine physicist would be excited to discover evidence of new physics - that myths of “desperately trying to maintain the status quo” that is often bandied about does not make any sense at all. So yes, there are no such forces, nor will there ever be. There is only a healthy scepticism of extraordinary claims, which is how it should be.
  10. No more than is currently the case. Hundreds of thousands of years ago the only mode of transportation was ones feet. As previously mentioned migration came with many dangers and unknowns. Groups of humans being isolated from each other wasn't a social choice. Soon as better modes of transportation we're developed humans established global relationships. I think you are seriously misreading history. And yet entire populations of people throughout Central and South America are essentially bi-racial going back to the error of your initial post which identified Mexico as a race. Additionally Neanderthal and denisovan DNA is present in billions of people. Humans are a mixed bag and have been for millenia. Your picking and choosing of social norms isn't consistent. You are imagining some apocalyptic situation where all technology and knowledge is lost to the point where people migrate based on skin tone (which has never happened in history) yet still strictly follow loosely held societal norms. It doesn't make any sense.
  11. Best James Bond

    The best Bond was the one in the books.
  12. I wonder which came first... Did the opiate addicts vote in D Trump, or, did the D Trump voters become opiate addicts once they realized what they've done.
  13. Best James Bond

    Definitely S Connery. Its no coincidence Swansont picked him for his avatar. Only good thing about G Lazenby was the fact that D Rigg was the co-star. ( fell in love with her while she was Emma Peel on the Avengers ) R Moore was a good Saint but a joke as Bond. Much too 'cheesy'. T Dalton wasn't bad, but I expect Bond to be larger than life. I actually liked the P Brosnan films, but you're right about the last one. Don't really mind D Craig, although the plotlines seem a little convoluted. Would have loved for the old man taking care of Bond's ancestral home in Skyfall to have been played by S Connery, but he was already retired, and the 'differences' between him and the Broccolis are too deep to cross. Wonder who will play Bond next.
  14. What is faith?

    If faith is seen as the same thing as a belief in a God, then it doesn't apply to me. I can't say why people do have that belief because its subjective to their own perspective. My interpretation of faith is when someone is dependent on a perspective as being central to the value of identity. Being faithful to an idea. Not turning aside from a value recognised, to enable recognition of others. Holding on to that rope for dear life with all your focus on the view in front of you, So you can't see the step that would change your circumstance or the danger in its condition. I don't think you can understand faith in a belief unless you can separate the two. If you can't, I don't think it can be a scientific question either. My interest in faith isn't in its specific manifestation of a belief in god, or discrediting one. Science can't do that. Science is dependent on evidence and to assume otherwise is assuming properties of science it hasn't got. Individual perspective is essential to diversity. My interest is in when diversity of perspective is not recognised or valued. When perspective is fixed, and seeks to enforce its view of reality as correct. Even when its missing the pieces needed for it to be.
  15. Confused about resonance structures

    Why do you think this is not correct? It reads mostly fine to me.
  16. So you essentially agree that pale and dark skined people will congregate in some populations? The alternative to migration in such a situation would be intermarriage, of course. However that is highly unlikely, because when it comes to physical attraction people, especailly males, they tend to be attracted to people that look like them. Male might be attracted to the most subtle things that are actually a similarity. For an example a person with colored eyes might find a female with colored eyes more attractive than a browned eyed female. According to research reported in the July 2010 issue of Personality and Social Psychology Bulletin, we are attracted to people who resemble our parents or ourselves. this would also include skin color. So by looking at society as a whole, the majority of people will probably marry those who are within their own race. So I am not sure if light skinned people will choose to do that instead of traveling to a coniferous forest, dicideous forest, or a northern mountain range. Perhaps some people will choose to intermarriage but most might choose to migrate. I personally know people that would choose to migrate and I think more people will choose to if they find it necessary. Do you agree? Why or why not? If that was the case everybody would be the same color. People that prepare for these disastrous events know to stock up on vitamin D because the point in that survival situation is to be as healthy as possible. "Stocking up on multivitamins, Vitamin-C, etc., is an important additional “to-do” on a prepper’s list. As modern life as we know it falls further into decline, you need to stay as healthy as possible in case the SHTF." "The point is, you should recognize that you will probably not be eating as well as you’ve been accustomed to, and there may be a need for vitamins in your preps." Health would be more important to us in a survival situation, especially if we have to live as natural as possible. And moving to our natural habitat would be a step to take in order to do that.
  17. Thermoelectric effects in metals

    When two blocks of platinum are brought together electrons do not tend to move from block to another block, because the blocks are identical. Zero motion means zero Seebeck effect. When a block of platinum and a block of iron are brought together electrons do tend to move from one block to another block. Then some works must be done to separate the blocks. The blocks form a charged capacitor. If there was a way to connect wires to that capacitor so that there is no Seebeck effect between the blocks and the wires, then we would have a perpetual motion machine. Actually there is a way to adjust the contact voltage between the wires and the blocks: Temperature. Heat in the contact decreases the contact voltage, I guess. The effect is called contact voltage if I remember correctly. I mean the effect of contact becoming a charged capacitor. What happens when a cool platinum block and a hot platinum block are brought together? Interesting question there ... some electrons move from the hot block to the cool block. Electrons have less potential energy in the cool block, so electrons tend to fall from hot block to the cool block. This effect is probably same in all metals, so this effect's effect on the Seebeck effect is zero, probably.
  18. Unitive Mystic - I don't see any obvious mechanism or motivation that would induce the kind of preferential migration patterns you suggest - ie would send pale skinned people to high latitudes and dark skinned people to the equatorial regions - they wouldn't know that would be a long term solution or even any kind of solution, even if they have the means. Getting sunburned can prompt changes to behaviour - make hats or other kinds of clothing (especially parents doing so for vulnerable youngsters), have shade in and around camps, change time of day for some activities - but I doubt migration would occur to people as a rational response; within walking distance there would be no apparent differences in sun exposure except by changes to vegetation or perhaps deep valleys vs highlands rather than latitude. It's clearly possible for populations to do well enough for other reasons that sun exposure or vitamin D deficiencies is not going to stop them. Migrations tend to either be motivated by belief that the destination offers opportunities, or motivated by desperate need and will lack clear direction. Raised levels of dangerous cancers later in life may or may not be understood as being related to sun exposure, but I don't see that we can assume they would know that or know that North/South migration would help - and, all things considered probably won't. Rather than migration changing what mix of skin types in different geographic/climatic regions the real mechanism that looks most relevant would be evolutionary - but we then need to assume that civilisation and long distance travel doesn't arise again over evolutionary time frames and I doubt that would be the case. Assuming it doesn't it is certainly possible that some populations would divide across skin colour lines and intermarriage would be uncommon but the notion that pale skins belong on one side of an imaginary line and all the rest (the "one drop" rule) on the other has always been false. To me it looks like the easiest way to a permanent solution to vulnerability to sun exposure in pale skinned people in hot and sunny climates/dark skinned in sun poor climates would be intermarriage (gene flow), not migration, and this is very likely to happen, even with racist, isolationist societies given enough time; ie those that 'successfully' prevented intermarriage would be less fit than populations that allow or encourage it. Given that the genetics for more melanin rich skins has already evolved, gene flow can introduce it rapidly (in evolutionary terms) to populations that don't have it, and vice versa. No need to migrate.
  19. Yesterday
  20. Humans can live in nearly all environments. Being set back a generation or 2 wouldn't change that.
  21. Lots of people today are homebound, have an indoor occupation, and alot of people with dark skin live in northern latitudes so it doesnt surprise me to see so many people vitamin D deficient. That doesn't make D deficiency harmless and in a collapsed society, it would be even more harmful (because of the importance of immunity to sickness and the preservation of energy) White people have been living in southern climates for hundreds of years. They used brimmed hats, linen clothing, natural sunscreen, long beards and hair. These methods are good but alot of times they were inefficient or made you even hotter outside, still had prematurely aged skin and a higher skin cancer risk. Still better off in their natural habitat. Let's change the situation and say that civilization wasn't collapsed yet and we all had a warning. Then, would you think that we should relocate to areas we can live as naturally as possible while we could?
  22. How to measure the mass and balance point of a human limb?

    Need more info... Stick yourself underwater on a scale, adding weight if necessary to hold you in place and get a reading. Then stick the part of your arm out of the water that you wish to weigh. The difference will be the weight of that part of the arm, plus the weight of the displaced water. So then deduct the weight of the displaced water and you have the weight of that part of the arm.
  23. Half the world population lives on less than 2 euros a day. They absolutely do not all have those things. People from the Netherlands and England have been living in places like Africa and India several hundreds of years. Long before cars and commercially available sunscreen. They did things like wore hats and kept to the shade much as possible. Sun exposure doesn't limit where people can live. It never has.
  24. Best James Bond

    Who was the best James Bond? Below are my impressions of all 6 who have played bond. Sean Connery - Everyone's default #1 choice. While Connery had the most impressive body of work through his long career his Bond films themselves often appeared cheaply made (Thunderball being an exception) and were rather silly. Austin Powers satire of them was so hilarious in part because of how accurate it was. Sean Connery in my opinion is far and away the best actor to play Bond but wasn't the best Bond. George Lazenby - I have never seen his Bond film in its entirety so I can't judge. Roger Moore - First Bond I saw. I think who was Bond in the first Bond movie or two one saw impacts who they think was the best. As a kid Roger Moore's Bond films had made there way to TV and were the first Bond films I saw. Moore's Bond was less physical than Connery's. For Connery gadgets often seemed like an after thought but with Moore's Bond gadgets were critical. Lacking Connery's physicality gadgets saved Moore's butt many times. Roger Moore was good Bond. Timothy Dalton - If Bond were a real person Timothy Dalton is exactly who I'd imagine him to be yet Dalton's Bond films lack Bond-esque storylines. They felt as if action films written for an American action hero had been recycled and Bond's name tossed in the mix. For the first time Bond was primarily motivated by things like Revenge rather than his mission. Neither Connery or Moore's Bond took things personal to the distraction of a mission. Dalton's Bond films are among the worst despite Dalton himself being a good fit. Pierce Brosnan - He was the best of Connery and Moore. Plausible as a form Naval Commander yet pretentious and snooty. The Brosnan films remembered that Bond stories are playful while at the same time making sure to keep high stakes. However they failed to deliver quality villains. Overall Brosnan's films were my favorite. It I had to sit down and watch just one actor's Bond films back to back it would be Brosnan's. The last one left a lot to be desired though. Daniel Craig - I can't stand him as Bond, lol. Bond is suppose to be to life long professional. Bondis suppose to be intelligent, persistent, well trained, classy, and clever. In Craig's films Bond is clumsy, moody, raw, indifferent, and dry. As with the Timothy Dalton films the Craig films give Bond strange emotional motivations which compete for his attention and focus equal to the mission at hand. I don't them.
  25. I think you have been playing a little to much fallout lol. Half of the world's population is vitamin D deficient, but they have doctors, vitamin supplements, and antibiotics. In the beginning people will have cars. And that is how they would relocate. And people would only relocate if it would be necessary. Which in alot of situations it would. People wouldn't use sunscreen, sunglasses, lenin clothing and skin cancer treatment and vitamin supplaments if they didn't have to. I think that you might think that people with white skin living in southern lattitude would be fine without modern conveniences. History would say otherwise.
  26. Economic collapse would not necessarily result in a loss of technology. And WW3 would likely be a very different scenario. Even with a loss of technology, though, there are many levels of technology. It's still very vaguely defined.
  27. That's an electroweak interaction, not an electromagnetic one.
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