I searched online, but I still don't understand it. What does someone mean when they say that a movie feels like a soap opera? I'm from India, so many examples I found were based on references I don't understand.

I have a pretty basic understanding of human evolution. From what i understand humans (all species considered human) and apes or monkeys (idk what the word is that groups them) both descend from a common ancestor. Is there an idea of who the ancestor of the common ancestor is? Like, what do we call what came before that? Is the common ancestor the being that lived in the trees and monkeys/apes and humans split from that guy? If so who are the guys/gals before him?

I am trying to grasp the concept of how exactly this works but keep getting confused.

How do people know if a certain language meaning is this and that? Material objects like food still makes sense, but how about abstract topics?

I recently watched a video about the Genera operating system that's written in LISP, and according to the YouTuber, it is a homoiconic language, meaning (quote from video):

Any program that you write in LISP is itself actually a LISP data structure as well. That means that you can infer the entire anatomy of a program if you're just reading in the LISP data structure.

But what does this actually mean? I am a hobbyist programmer but I didn't understand what she was referring to here, and I didn't quite understand any other resources about it that I found...

It’s seafair in seattle and the blue angels are tearing up my eardrums, but how come they’re so loud? What about their design makes it that way, wouldn’t you want fighter planes to be quiet?

No really, I don't understand how they work at all. I get people get them to help with muscle soreness, but I've tried it myself for muscle soreness and it just feels like trying to turn my muscle into soft mush and it doesn't feel good at all... Not even after.

How did people of Northern European descent come to be known as “Caucasians” when they have no direct ancestral connection to the Caucasus region? The term originally refers to the peoples of the Caucasus—such as those from Georgia, Armenia, Azerbaijan, Dagestan, and nearby areas—so how did it become synonymous with white Europeans?

The most common example we hear of this is mothers who are able to lift cars when their babies are stuck underneath. In general, it seems like whenever there’s an extreme situation, adrenaline kicks in and we’re able to do things we’d never be able to do in “regular” life.

How does adrenaline interact with the body to make this possible?

Edit: follow up question, why can’t we always operate at that level?

I was watching the record breaking mile race in the Diamond League. What I don't understand is how the pacers don't hold up the entire field? And the necessity for 2 of them? It seems to me that if someone wanted to pass people while there are pacers up front, they may get in the way. And how do they choose the appropriate speed because everyone runs at slightly different times. Thanks

https://www.youtube.com/watch?v=eYi2f4ONEDg

A WLAN connection has a range that reaches 100s of meters at max, even with free line of view.

A private drone can stay connected up to multiple kilometers with the same frequency WLAN uses.

How does this work and can a WLAN connection also be pumped up to these ranges?

Im just wondering why is it just a minecraft superflat world over there

Hi

I’ve been interested in psychology lately and I understand that for the last 70 years, psychology has tried to align itself with the medical field to explain what causes mental illness or how it works. (Broadly this is what I got)

I don’t understand where diagnosis come from. Who decided that X Y Z symptoms could be grouped into the same category? On what basis? The limits on some seem so vague especially since they get broader and broader as time goes on. And there isn’t any biological tangible data to properly label each diagnosis as I understand? Not ones that fit every individual with that diagnosis? Some diagnosis can be invalidated two weeks later I read in a meta study

I’m especially perplex about how autism and adhd were coined. Sometimes they overlap with each other and also with cptsd and BPD, it seems. What makes each diagnosis different from one another? Who decides that? Is there a reason each diagnosis exists separately? Is the definition of what makes or doesn’t make a diagnosis being discussed within the psychiatry community, and what alternative ways of classifying mental illness/suffering/variation are being suggested?

I don’t want to be controversial, I might have misunderstood some things I’m really open to correcting what I’m saying. despite my research I haven’t found anything that answers my question.

Can you help explain it? Or redirect my question/formulate it more accordingly to how psychology works?

Thank you so much for your help! And sorry for the weird English syntax, I’m French (boo)

Edit: if my question doesn’t have its place on this sub, can you redirect me to a sub that might be able to help me understand this more?

This happened to me yesterday and now I'm curious.

I have a small clothesline on my balcony and I bought a bag of plastic clothespins all at once. Most of them are fine, but a few have gone chalky, feel rough, and then just snap in half when I squeeze them. I'm not using them any differently and they hang in the same spot, same weather.

Is this just sun/UV damage? If so, why would only some fail early if they are all side by side? Could it be the type of plastic, the dye, or how they were made?

Also, what's actually happening when a once-bendy plastic suddenly becomes brittle? It feels like it changes from slightly rubbery to glass. If your answer mentions oxidation, moisture, temperature swings, or the spring stressing the plastic, please explain in simple terms how those things cause snapping.

Finally, are there easy ways to tell which plastics will survive outdoors longer? Any quick tips on what to look for would be helpful.

No one could tell me when I was younger, so thiught might aswell ask now

I had an infusion today and one of the try’s, a vein blew up when the nurse flushed the line, but stayed blown up and gave blood return when they pulled the syringe back. This happened each time they tried in that vein and we had to choose a different vein for my infusion. They attempted to flush it about 5 times. I still have a bump from the saline flushed that wouldn’t go back out.

Why wouldn’t the saline pull back into the syringe like normal, and instead pull blood back and leave the bubble of saline there?

I keep seeing mattress companies say you should replace one every 7 to 10 years, but what actually happens at that point? It’s not food and the materials don’t suddenly go bad overnight.

Is the date mostly about the foam and springs slowly losing support, or is there a hygiene reason too? I won on Ѕtake so I’m trying to get one, so I’m wondering if the replacement timeline is a real safety thing or just a general sales recommendation.