The problem is that people do get treated unnecessarily.

The real problem, though, is that doctors do not have a reliable way to determine which of these very small cancers that are caught by a biopsy are potentially dangerous and which will never bother a man in his lifetime. (Indeed, autopsy studies show that more than half of men in their 50s and three quarters of men in their 80s in the U.S. had prostate cancer but died of something else.)[...]Such ambiguity would not be so bad if the treatments were virtually risk free.[...] Surgery (open radial prostatectomy) often results in urinary leakage [...] damage to the nearby muscle that controls urination may lead to incontinence. [...] Meanwhile, the nerves and blood vessels controlling erections may be severed during surgery, causing erectile dysfunction (impotence).[...] Radiation therapy of the prostate often ends up damaging the rectum and bladder because it is hard to avoid radiation scatter[...] Moreover, rectal bleeding and fecal soiling are frequent but commonly unreported side effects of both radiation therapy (including radioactive seed implants) and surgical approaches.



People do get treated unnecessarily. And those treatments have side effects that can be far worse than living with the cancer. Only 4 percent of prostate cancers spread to the bones or organs. Medical organizations now advise that asymptomatic men should not have routine screening unless they have a strong family history of prostate cancer.>> ^alien_concept:

@Yogi Perhaps because it's the most common form of cancer here in the UK and so many men remain undiagnosed because they're too scared to have it done and he though, fuck it. I dunno. Because it was funny and he knew it would be? I don't really understand what's dangerous about it @Skeeve? I can guarantee you that here they wouldn't treat anyone unnecessarily here on the NHS

This is gonna be long but please bare with me.

The pressure below the surface of any body of liquid is equal to the density of the liquid multiplied by the depth below the surface, multiplied by the acceleration due to gravity. The result is a quantity in pascals, or newtons per meter squared. To this number we add the pressure due to the atmosphere, 101325 pascals; the sum of the two is the pressure experienced by the koi.

The column of water is suspended by virtue of the vacuum that exists at the top of the column, ie. There is no atmospheric pressure pushing down on the column and hence you can 'support' up to 101325 pascals of water pressure within the column before water in the skyscraper would begin to displace water within the pond (this is how simple barometers work). Remember that the pond is under 101325 pascals of pressure, and that as long the pressure within the column is the same as outside there will be no net flow of water. For instance, the maximum possible height of the column would be 10.3 meters (101325/[9.8*1000]).

What all this means is that the water within the column is at a LOWER pressure (and getting increasingly lower towards the top) than the water within the rest of the pond; in a 10.3 meter column the pressure at the top would be 101325 pascals less than at the surface of the pond. So, if a fish looking for food or perhaps increased warmth were to come across the column and swim inside it they would find themselves at a lower pressure than they are designed for. Their air bladders would swell in the decreased pressure, this would in turn lower the density of the fish consequently increasing they're buoyancy forcing them higher into even lower pressure water, eventually trapping them at the top. As more fish find the tower, more fish are forced to the top where they begin to compete for the rapidly dwindling oxygen supply. Furthermore, freshly oxygenated water would not reach the top of the tower as the water flow would be severely limited through such a constriction. In the third clip you can see what MAY be the fish gasping for air.

In conclusion it seems likely that our German friend has succeeded in creating a fascinating death trap for his fish, and I'd bet that he got up the next morning to find that he had killed thousands of dollars worth of koi. This would also explain why we/I have never seen this design before. Of course, I am assuming that the fish lack the necessary muscle power to get themselves out of this situation, which they may well have, but the number of fish so close to one another seems odd to me. I would of thought that if they could easily get out of the column then they would, if simply to find a less crowded location.
Tl;dr IT'S A TRAP

EDIT: I guess I lost that bet as it would seem that the fish do have the necessary oomph to escape. Though I wish no ill will towards our fishy friends I would still be morbidly curious to see the effects of a ten meter tower.

>> ^Drachen_Jager:

Not really, it would be inverted. The pressure would be negative, causing the swim bladders to swell beyond their normal size and the air within to be more buoyant.
>> ^Payback:
>> ^Drachen_Jager:
I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.

Actually, the pressure differential is the same barely different as a pond the same distance deep.

somebody failed physics 101.
geez! the pressure in the column is exactly the same as in the pond!

Not really, it would be inverted. The pressure would be negative, causing the swim bladders to swell beyond their normal size and the air within to be more buoyant.

>> ^Payback:

>> ^Drachen_Jager:
I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.

Actually, the pressure differential is the same barely different as a pond the same distance deep.

>> ^Drachen_Jager:

I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.


Actually, the pressure differential is the same barely different as a pond the same distance deep.

I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.

Tags for this video have been changed from 'Tom Hanks' to 'Tom Hanks, urine, pee, bladder issues, uti' - edited by Stingray

Not quite so relevant to this video, but the Coelacanth is almost exactly like the earliest tetrapods (and also rather cute). Some of the related fish have legs, or very leg-like fins, and walk on the bottom of the sea floor. The lungs of the lung fish are useful for both buoyancy and breathing... and the fish which can do these things perhaps has an advantage over the larger fiercer fish which can't.
>> ^L0cky:

Heh, I could have kept my mouth shut
Seriously though, that's amazing. They also have a modified swim bladder, just like the early tetrapods.
Like a lot of things in evolution, for all the people that doubt x could evolve from y, there's usually not one example of a solution but many.
>> ^oritteropo:
But some fish do sprout legs, and thrust themselves out of the water. They're even rather cute, see http://blog.nus.edu.sg/lsm1303student2011/2011/03/24/africanlungfish/

>> ^BoneRemake:
>> ^L0cky:
People talk about fish jumping out of the sea and sprouting legs as part of evolution. I think it'd make more sense to be something like this.

Where the F have you heard of people believing fish sprouted legs and thrust themselves out of the water ? Pro Tip: do not hang around those people.

Heh, I could have kept my mouth shut

Seriously though, that's amazing. They also have a modified swim bladder, just like the early tetrapods.

Like a lot of things in evolution, for all the people that doubt x could evolve from y, there's usually not one example of a solution but many.

>> ^oritteropo:

But some fish do sprout legs, and thrust themselves out of the water. They're even rather cute, see http://blog.nus.edu.sg/lsm1303student2011/2011/03/24/africanlungfish/

>> ^BoneRemake:
>> ^L0cky:
People talk about fish jumping out of the sea and sprouting legs as part of evolution. I think it'd make more sense to be something like this.

Where the F have you heard of people believing fish sprouted legs and thrust themselves out of the water ? Pro Tip: do not hang around those people.

>> ^quantumushroom:

Common sense is not on your list.
Nor should it be.
>> ^shuac:
Great talk but we have more than merely five senses, the way we were mistakenly taught as youngsters.
1) sight
2) hearing
3) smell
4) taste
5) touch
6) balance/acceleration
7) temperature
8 ) proprioception (related to touch, provides the brain with the relative positions of parts of the body. this is how you can touch your nose with your eyes closed)
9) pain
10) other internal senses (gag reflex, urinary bladder 'fullness', sensations felt when swallowing, etc)



No comment on the paperprompter?

Common sense is not on your list.

Nor should it be.

>> ^shuac:

Great talk but we have more than merely five senses, the way we were mistakenly taught as youngsters.
1) sight
2) hearing
3) smell
4) taste
5) touch
6) balance/acceleration
7) temperature
8 ) proprioception (related to touch, provides the brain with the relative positions of parts of the body. this is how you can touch your nose with your eyes closed)
9) pain
10) other internal senses (gag reflex, urinary bladder 'fullness', sensations felt when swallowing, etc)

>> ^shuac:

Great talk but we have more than merely five senses, the way we were mistakenly taught as youngsters.
1) sight
2) hearing
3) smell
4) taste
5) touch
6) balance/acceleration
7) temperature
8 ) proprioception (related to touch, provides the brain with the relative positions of parts of the body. this is how you can touch your nose with your eyes closed)
9) pain
10) other internal senses (gag reflex, urinary bladder 'fullness', sensations felt when swallowing, etc)


I saw a Qi episode where they said we have about 21 or 22. Crazy huh...they didn't list them all though so I have no idea.

Great talk but we have more than merely five senses, the way we were mistakenly taught as youngsters.

1) sight
2) hearing
3) smell
4) taste
5) touch
6) balance/acceleration
7) temperature
8 ) proprioception (related to touch, provides the brain with the relative positions of parts of the body. this is how you can touch your nose with your eyes closed)
9) pain
10) other internal senses (gag reflex, urinary bladder 'fullness', sensations felt when swallowing, etc)

Whoah... hemorrhoids demons?! Those must be terrifying.

I wonder how they'd react if someone said they had to pee their demons out. Everyone knows that's the only way to get rid of the overactive bladder demons.