321–330 of 424 posts
> Parents – children playing in the water make noise. When they get quiet, you get to them and find out why. If you're a new parent and haven't heard this advice before, this is one of the key takeaways. It also applies any time young kids are playing out of sight. If your kid is in their room and it gets quiet longer than usual, it's a good idea to go peek in on them.
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Even with a 99% probability, there’s about one chance in three that you wouldn’t experience it if you tried a hundred times.
How does that work?
One way we could do this is look at the probability you'll roll it on the first roll... then the probability you won't roll it on the first roll but you will on the second roll... and so on. But that's a lot of math.
The probability of an event (death) and its complement (not death) totals 1.0. So one way we can get the probability of death is 1.0 - the probability of life.
Okay, so the only way you'll live if is if survive all 100 rolls. Each dice roll is independent (surviving the first dice roll doesn't affect the second dice roll which doesn't affect the third). So each individual dice roll has probability 0.99 of survival. For joint probability, we can multiply these together. The probability of getting heads on a coin twice is 0.5 * 0.5 = 0.25. So in our situation here, p(survival) = 0.99, and 100 times means 0.99^100, to get the probability of survival. 0.99^100 = 0.36. 36% chance of survival.
The probability of death is thus 1 - 0.36 = 0.64. 64% chance of death.
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Most depictions of things in movies are like that. Films must show you something interesting, and watching somebody do trial and error painfully on a bash script for 6 hours is not as fun as a fast pace keyboard murder while screaming "i just passed 3 firewalls" with beautiful animations rendering on the screen. If there is a camera, what you see is a lie. The difference between a national geographic documentary and…
Even national geographic documentaries are probably "lies" ... I just had the chance to get some basic insights in to evolutionary biology ... and boy is bloody mauling and devouring of prey just the tip of the iceberg. Intraspecies rape and infanticide is pretty common out there. (Look up the penis of drakes (male ducks) and why it looks the way it does at some point) Siblings competing for food with only a small pe…
Earlier quoted context omitted.
Most depictions of things in movies are like that. Films must show you something interesting, and watching somebody do trial and error painfully on a bash script for 6 hours is not as fun as a fast pace keyboard murder while screaming "i just passed 3 firewalls" with beautiful animations rendering on the screen. If there is a camera, what you see is a lie. The difference between a national geographic documentary and…
Even national geographic documentaries are probably "lies" ... I just had the chance to get some basic insights in to evolutionary biology ... and boy is bloody mauling and devouring of prey just the tip of the iceberg. Intraspecies rape and infanticide is pretty common out there. (Look up the penis of drakes (male ducks) and why it looks the way it does at some point) Siblings competing for food with only a small pe…
Our reluctance to produce informative graphic media has given people an unrealistically optimistic view of nature and life. This has warped social values and policy to our detriment.
I never got to properly thank the 15-yo lifeguard who saved my 7-yo from certain drowning in a crowded artificial lake pool. We turned away for what only seemed a minute and he was going under. He was slightly blue in the face when the life guard brought him out. The weird thing is he didn't fight or flail. He just sort of faded away into the water, and it struck me as especially weird that he didn't seemed scared at…
I am curious, hope this is OK to ask as I have a 7 yr old... How would you rater you 7-yo swimming ability when this happened? For example could he swim 20 meters (~60 ft)? Also I might watch that Netflix thanks. I don't go to Bondi much but Manly beach a few km away is interesting. They are always yelling at people who are swimming in the dangerous current area and it takes several whistles to get them out. I usuall…
In my case it was because there were so many people in the pool that I could barely move, after struggling to breathe a few moments I had to exert myself to climb up someone else's inner tube to gain my breath. But I do recall spending most of my time barely above water and struggling to breathe. Could have gone very bad.
Like others who commented I worked as a life guard and water safety instructor when I was younger. (Everything I am saying pertains to the US only.) I rescued quite a few children, it's hard to see in this video because the video quality is poor and the camera is at an angle that is worse than what the lifeguard in the video is seeing. Overall this victim is fairly active and should not have been very hard to spot in…
> teaching 5 year olds the butterfly and other high energy/low safety strokes without teaching elementary backstroke, breaststroke, sidestroke. I am amazed at how few of my early millennial peers have never heard of the elementary backstroke.
I watch my kid's lessons and I'm sure I didn't see it being shown to them. They got into what I google as "backstroke" straight away, without the "elementary" phase.
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> The female tit (the bird ... not what you think) basically cheats so much that there is a possibility that none of the offspring is actually of the male that feeds them ... Pretty sure "cheating" and infidelity are largely human concepts. That's normal and natural behaviour for many species.
> "cheating" and infidelity are largely human concepts It is normal behavior, yes. But it comes at the expense of the cheated on party. The term here is "parental investment" and is roughly how much energy a party has to invest in the offspring. If the male tit builds the nest and provides food for offspring that is genetically not his it puts it at a disadvantage and it is definitely exploited by the female.
Think about it. In many species there is unequal parental employment. That's just how nature works. Is it really "exploitation" in the human sense of taking advantage of someone else?
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I was a lifeguard at Disney World (Disney lifeguards work the waterparks, all the resort pools, and the pool and the lake at the private cast member park, Mickey's Retreat) in the late 90s. I believe at the time it was 20 minutes on duty, 5-10 minutes rotating to the next station. There would always be a couple lifeguards rotating in this scheme and they'd able to assist if necessary. It was very boring, and keeping…
I think a pool closed for 3 days indicates gross mismanagement of chemical levels, not that contamination in public pools can’t be successfully managed. In theory a public pool under proper management should be cleaner than a private pool which almost certainly isn’t being professionally managed. Chlorine in pH balanced water with the right hardness is surprisingly effective. Pro tip, if you can smell “chlorine” it p…
One of the important lessons I learnt from a lifeguard is that movies depict a very inaccurate representation of drowning. The movies would have you believe that drowning is a violent and noisy event when in reality it is an inconspicuous and silent event. The victim cannot shout or call for help when they are struggling to keep their nose above the water level. Another important lesson I learnt that sometimes when s…
Is there still water in their lungs? Why doesn't it get coughed out once they are out of the water?
No, it is not as simple as "leftover water from the drowning". Rather, due to the presence of the water in the lungs, which has been presumably expelled entirely, the interior of the lungs becomes irritated and inflamed.
This inflammation process produces it's own fluid which will slowly fill the lungs and "drown" you - especially while you are prone, while sleeping, wherein the fluid pools along the entire length of the lung, rather than just filling up the bottom of the lung.
It's a misleading term ...