What an enormous public heath issue iodine deficiency was in Switzerland and how completely everyone forgot about it after it was fixed by the introduction of iodized salt in the 1920s: https://www.lrb.co.uk/the-paper/v45/n23/jonah-goodman/a-national-evil
That people with mental health issues hear different types of voices depending on the country. If someone with schizophrenia from the US hears voices, it is more aggressive or negative while someone from Africa or India might hear a more playful voice. I think that says a lot about the different cultures and upbringing.
https://news.stanford.edu/2014/07/16/voices-culture-luhrmann-071614/
If you’re on a truck traveling at 60mph, and throw a ball forward at 60mph, that ball is moving at 120mph.
But if you replace the ball with a flashlight, then the light isn’t moving at the speed of light plus 60mph. Instead, it slows down so as not to exceed the speed of light.
It’s like if you threw that ball at 60mph and it went flying forward, but at 10mph, no matter how hard you throw.
Uhh, relativity, fun. This gets a lot more mind boggling, imagine 3 people, A and B are in a train and C is an observer outside. From C point of view, B will pass him first, then A. This train is going at 50% the speed of light and it's very long, A and B are 1 second light apart, i.e the distance that light takes 1 second to travel.
If A shines a flashlight B will see it 1 second later. However from C point of view since the light was shone the train moved forward 0.5 light seconds. So the light has to travel 1.5 light seconds distance, and it does so in exactly 1.5 seconds. So the observers disagree on the distance the light travel, but also disagree on the time it took, but they agree on the speed of light.
This makes things weird, because both A and B say that 1 second passed, but C says that 1.5 seconds passed. This means that people moving faster experience time slower. Which means that if you take two twins, put one on a fast moving ship, e.g. 80% speed of light, by the time he comes back only a few minutes would have passed for him, but years would pass for the other.
The back of my brain is fizzing.
I had the Relativity conversation with my 16 year old this past weekend, as he is taking AP Physics.
Yeah, he couldn't wrap his mind around it. Honestly, I can't say I understand it very well. I get that C (speed of light) is C in all reference frames. What I do not understand is for a spaceship traveling at C, the forces being transmitted between the atoms from stern to bow are unable to catch up to the next forward atoms. Hence time dilation, at least for those forces being transmitted "forward" in the ship's reference frame.
However, what happens to those forces being transmitted bow to stern or "backward" in the ship's reference frame? Would those forces be "dead stopped" in an external reference frame? Yet travel at C from bow to stern in the ship's reference frame? What does that mean for the ship if those forces are only being transmitted one way?
Or, as I very much suspect, do I just not have a clue as to how it really works. I always thought that "time dilation" was simply the inability of forces being transmitted from atom to atom. As those forces are limited to C and they are attempting to catch up to another atom also traveling at C. With that said, those forces are transmitted in multiple directions, not just the vector the ship is on.
Ok, another one of my very few brain cells just committed suicide and I'm not drinking anything, so I'll stop now.
My understanding is that it's impossible for a spaceship or anything else with mass to actually reach the speed of light. It can only approach it. Only massless energetic waves like light and radiation can travel at the speed of light.
If you’re on a truck traveling at 60mph, and throw a ball forward at 60mph, that ball is moving at 120mph.
Technically it would be moving at something like 119.99999999km/h and that discrepancy slowly increases the closer you get to the speed of light
I watched a video about the development of the line, that ridiculous building project in the dessert. I see glacier basically melting in front of my eyes but never felt as doomed as watching this shit developing for some reason. Just the sheer amount of manpower, diesel and money wated on the viggest pile of shit i have ever seen while the planet around them is dying.
Is that fucking garbage still going ahead!??
Sheeeeit
Twitter users
Why? Just leave.
Same with people who complain qbout facebook and use facebook.
That certain tribes who live in a jungle setting can discern and have names for about 40 different shades of green, where a city dweller would see them all as being exactly the same shade.
I think I've read before that our eyes are most sensitive to the color green out of any other color, something about it that wavelength of light is absorbed more readily by the cones in our eyes. Being exposed to it daily and maybe having their survival dependent on it probably helps them develop that ability.
Yes, I paint in free time and getting the right shade of green to make natural scenes look realistic is extremely difficult.
I thought it was red, for ripe fruits?
Nah, people are always confusing orange, red-orange, and red
Do you have a source? There is a common myth that innuits have 100+ words for snow, which is stretch beyond any reasonable sense, I'm afraid this might be similar.
The main studies of a persons language constraining their colour perception derive from the Sapir-Whorf hypothesis.
This article explains some of the different language and perceptions across different cultures:
https://abnormalways.com/color/color-perception-across-cultures/
The peoples I had heard of previously, are the Himba tribespeople, with a 'hyper-perception' of green hues.
This is an ongoing research area, and I was hoping someone in the field could outline the recent key changes in understanding of cultural effects on colour perception.
There are papers such as this one, that I can partially follow, but would benefit from an interpretation from others more knowledgeable than me.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0158725
That people are paying $3500 for a pair of goggles.
Yeah, but it's from Apple! /s
The actor who played the main guy in The 4400 is married to William Shatner's daughter.
To boldly go... where few men have gone before.
The astounding incompetence and corruption woven into Australian politics and law enforcement.
Statement from FriendlyJordies
Coronation (re-upload) (the video referred to in the above)
I feel that just living in America, my mind is boggled on a daily basis, and not in a good way.
What happened exactly today that boggled your mind?
Former fox news anchor is going to Russia and presumably thinks he can end the war in Ukraine
Ah so not America but the Internet rather. If its the Internet, Im fine with it. I intentionally avoid news sites and ragebait. Think of it logically. It wont really do anything to your life really. No need to keep reading these.
Recent as in the last couple years but when I was diagnosed with ADHD, I realized that most people dont have an interest driven brain. They can just do boring stuff just as easily as fun and engaging tasks.
That only 600,000 people globally are starving. 95% of which are in Gaza right now because of the current shit going on.
It is just counting starving people with specific parameters that define "starving," but still; I thought that number would be much higher.
Where in the world did you get that number and what were the specific parameters?
That if there are infinite universes out there in the multiverse then there are infinite amount of universes exactly like this one. Which means we’re stuck living this exact life across infinite universe and we’ll never be able to escape it. So that’s kind of depressing but mind blowing I guess
Perhaps. But infinite universes is still just a theory. So why let such a astronomical 'what if,' get you down?
Yep, if there's an infinite number of parallel universes then there's an infinite number where nothing is different. Maybe the only difference between the universes was the position of a mote of dust on an uninhabited planet in a galaxy on the other side of the universe.
If the many worlds interpretation is correct, that would mean that there's not really an infinite number of discrete realities, but more of a continuum. So there are infinite other realities in the same way that there are infinite points on a line, but this exact reality is still unique.
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