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Ask HN: What is a science fact that blew your mind when you learned it?

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Re: Ask HN: What is a science fact that blew your mind when you learned it?

#141

When i could "see" my visual blindspot. https://lasikofnv.com/try-these-3-fun-tests-to-find-your-vis... .

Holy shit... anyone reading that doesn't understand, follow that link and follow along. That was... terrifying when you think of the ramifications. What's more interesting with glasses, my blindspot is larger than without my glasses.

Wow... just... mind blown. I always read about it, but never experienced it... wow...

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#142
post #26

A gallon of gasoline creates 20 pounds of carbon dioxide. So my trip to the grocery store could be adding as much carbon dioxide to the air as the groceries I pick up!

Let me add on. Your average big tree (oak, pine, maple, etc) after about 10 years of age, collect about 40 pounds of carbon dioxide every year. Again, averages, there are plenty of factors.

I use that as a way to visualize the problem with "a solution".

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#143

Earlier quoted context omitted.

OK, but that's proof of the wave nature of light, not quite of the quantum nature.

Let's try to work the problem in a way that avoids pedantry, just for a moment. This is one of my favorite PBS clips from the 80's in which Richard Feynman explains how strange the nature of light and by extension all of electromagnetic radiation. https://www.youtube.com/watch?v=FjHJ7FmV0M4 If you listen carefully, you notice that he never talks about wave/particle duality (because he wasn't giving a classroom lectur…

For this problem/phenomenon, I'd probably just talk about waves and interference. I might mumble something about something elaborate and complicated going on at a deeper level, or I might ignore that and just talk about waves.

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#144

Earlier quoted context omitted.

Ironically, of course, Popperian falsifiability is itself unfalsafiable, and therefore does not meet its own definition as a member of itself. Popper knew this, by the way. So the inverse to the trap you point out here is the claims that "if not falsifiable, then unable to be true/useful", which is just as specious.

Aha! Now that's why some people say that science is a religion, too.

I always allow for the possibility that science is a faith (not religion) simply because there is no way to prove that the universe actually obeys laws that we can discover. Just because an apple fell down in the same way in each of a million experiments, it's not necessary that the relationship we discovered is a "law" that defines the universe. It could just as well be that the next time we try it, the apple falls differently.

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#145
post #115

How prion diseases work and spread. They're basically infectious lego. You may not thank me if you read about them...

I read somewhere they survive even 1000°C cleaning of stuff. Maybe dental implements.

I get what you are saying, but it just occurred to me "survive" might not be fitting for these ... "things"? They are not quite "alive", are they?

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#146
post #40

Science doesn't "prove" hypotheses - it disproves them. For this to work, a hypothesis must be falsifiable. Most pseudoscience (and religion) makes non-falsifiable claims, meaning they are incompatible with scientific discourse. This simple observation is a powerful tool in any bullshit-detection kit. Once produced, a scientific hypothesis of any merit will be attacked vigorously with experiments until enough parties…

You're correct in the sense that this is what science is per Popperian definition. However, I would be careful to assume that many scientists are actually so busy refuting hypotheses. The Popperian ideal and the reality in science are two different things. To cite a paper I currently read: > "As Chalmers (1999) remarks, when we turn to history of science, the idea that falsificationism is actively undertaken borders…

I would like to add to your remarks that science actually says something along the lines of "Grant me these assumptions/axioms/miracles(i.e. space-time, causation, etc.)" and then I can give you a theory of gravity, statistics, etc. This I think is hinted at in Gödel's core insight from his incompleteness theorem.

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#147

Earlier quoted context omitted.

Aha! Now that's why some people say that science is a religion, too.

I always allow for the possibility that science is a faith (not religion) simply because there is no way to prove that the universe actually obeys laws that we can discover. Just because an apple fell down in the same way in each of a million experiments, it's not necessary that the relationship we discovered is a "law" that defines the universe. It could just as well be that the next time we try it, the apple falls…

This is called the problem of induction and is indeed fundamental to the scientific method.

https://en.m.wikipedia.org/wiki/Problem_of_induction

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#148
post #67

For me it's material science misconceptions, corrections to what a kid / the over-simplified public conception are. As I'm not a material science expert, if I'm wrong or slightly incorrect please explain what actually happens. "diamonds are forever" It's appealing to believe that a crystalline structure, a pretty one too, might exist until actively changed. Diamonds are not forever. What 'blew my mind' is that diamon…

May be wrong, but I think it correct to say glass is a 'fluid' (it flows - very slowly), gases and liquids are generally fluids. But glass is not a liquid.

Re: Ask HN: What is a science fact that blew your mind when you learned it?

#149
post #40

Science doesn't "prove" hypotheses - it disproves them. For this to work, a hypothesis must be falsifiable. Most pseudoscience (and religion) makes non-falsifiable claims, meaning they are incompatible with scientific discourse. This simple observation is a powerful tool in any bullshit-detection kit. Once produced, a scientific hypothesis of any merit will be attacked vigorously with experiments until enough parties…

according to Karl Popper, yes. I prefer John Von Neumann's take on it... "“The sciences do not try to explain, they hardly even try to interpret, they mainly make models. ... The justification of such a mathematical construct is solely and precisely that it is expected to work - that is correctly to describe phenomena from a reasonably wide area."

these days, we adopt models. discard them if they fail and start all over again. seems to be a better and more elegant way.

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