Salmon Can Turn on Night Vision. Why Can’t We?
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- Опубліковано 2 жов 2024
- Most of us can only see certain wavelengths of light our entire lives. So why can salmon switch on night vision? We'll learn how they can reshape their eyes to see into the infrared.
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On the internet, no one knows you’re a salmon
In the ocean, no one can hear you scream. 🐟🦈
Hmm. Fishy.
He's a salmon!
except bears. Trust me. They *just know.*
@@sizanogreen9900 "Mrs Salmon! We traced the bear call! The bear's calling from INSIDE the river! Get out of the river now! 🐟🐻
Fascinating! Thanks for sharing! I wonder how much vitamin A the med students were ingesting in that one study. Getting too much vitamin A can be toxic.
I'm injecting all kinds of vitamin A into my eyes. Will report back next week.
I wonder if A2* is less toxic 🤔
@@Merip1214 I don't know but I can see wifi now.
Hence why Polar Bear liver is toxic to humans.
My wife’s family (to me) are night blind. At light levels I think are more like a dim daylight level, they can’t see a thing. Comparing with my sisters, it seems I can see even more than them. Interesting observation.
“Even though humans will never be capable of this trick.”
You underestimate my power.
humans adjust in slightly dark places, "adjust"
They can see further in NEAR infrared. Far infrared is heat, which can't be focused with a lens, but requires a sensor.
Ummm... JWST focuses IR light. With REFLECTION! Mirror!
With salmon being such a large part of my diet I'm just happy they have night vision and not net vision.
🚪
Yet here you are showing signs of net vision yourself. 😂
I've always wondered why infrared vision isn't standard for animals. Wouldn't it be immensely helpful (and beautiful) if all living things were visually glowing? Why would evolution not select for such capability?
If the benefits of a mutation don't outweigh the detriments then it is unlikely to be passed down. If seeing more infrared comes at the cost of poorer overall vision or the need for more energy or longer development time it would not become prevalent.
I think the most likely answer is that there’s some sort of evolutionary prequisite. Plus-it wouldn’t be useful for all animals and regions. Cold blooded creatures wouldn’t stand out as much, and plant life wouldn’t show up much at all. Like, a cow wouldn’t get anything out of heat sensing it can’t get with the eyes it already has
I've actually wondered the same thing about ultraviolet. Infrared light doesn't harm you if you can't see it. And besides we can feel heat so we still have a sense for detecting it. But ultraviolet is different as it's the area on the electromagnetic spectrum where your dna will get damaged (and it only gets worse the higher up in wave frequency you go). You'd think being able to see a form of light that is hazardous would be important evolutionarily speaking? 😅
it's just not useful enough for most animals, like why would a zebra care about seeing in infared when its eyes already are effective enough for spotting predators and finding food
@@1TakoyakiStore one neat thing to look up about seeing ultraviolet is those who've had cataract surgery, that can see a fair distance in to the UV spectrum as violet. Most animals can too. High voltage power lines are known to change migratory paths IIRC in the dark due to their fear of, to us, invisible corona discharges.
Not surprising that the increase of the vitamin alone does not come with the necessary enzymes that are compatible with our photo receptors to expand the range ;)
Charlton Heston.... "Fish sticks are people!! SOYLENT GREEN fish sticks are people!"
Since the salmon use their night vision in rivers is the switch triggered by the environmental change in salinity? Salty ocean water suppresses the formation of vitamin A2, fresh water turns it on? Not many fish can survive in both types of water but it would be interesting to know if other species that can do this also have night vision...
Salmon when they hear about how human name colours: _So you named a colour after me?_
_Is it silvery like my skin - hang on why is it light pinkish?_
*Why is it **_that_** colour....?*
Maybe we do have night vision, we just don't know where the switch is.
The switch is not looking at a light bulb for a few minutes. It's surprisingly hard to do these days.
Funny story … when my iPhone unlocks with Face ID in a TOTALY dark room I can see the IR firing from the “dynamic island”. I thought everyone could see it… apparently It just me
I checked the absorbance shift in the recent paper published in a journal. It is towards infrared but not infrared per se.
salmon: Humans can live after mating, why can’t we?
Looking at the numbers they have more offspring than we humans generally have so I'd call that a win, even if they die after mating. Guess it could be worse like being eaten alive after the mating is done?
Virgin salmon on its death bed: "Why fish God, why!? 😢"
Id love to see a study into if its possible for human bodies to be tricked into producing large amounts of A2 instead of relying on just a food source. Surely there is some mechanism we could harness to give it a try with?
Let's say we don't count in the ethical perspective. in order to do that one'd have to modify the dna responsible with that pathway (and bc we have around 3,7*10^13 cells it's not feasible to do it to a developed organism so you gotta do it in the really early stages, 2-4-8 cells). not only that those pathways are kinda complex, but you could also affect something unwanted leading to a complete mess. The thing is that even the so called 'non-coding' regions actually play a big part in the coding regulation and the more you know about it the more interconnected it gets and the 'junk' dna becomes 'good' dna.
*Short/simple version, would be interesting but it involves a ton more research into how our genomes work before even starting. Ngl, i'd also love to see this type of experiments (ethics) but for now we need more research. Look into those done in single celled organisms to produce various stuffs or to detect different things, they are easier to understand and still amazing.
Additionally it would be more logical to enhance something we already eat than alter ourselves. Less risks
@@antoniolaza736 Engineered viruses can edit cells at scale.
"You got to get sent to a slam, where they tell you you'll never see daylight again…"
"You dig up a doctor, and you pay him 20 menthol Kools to do a surgical shine job on your eyeballs."
"... Looks clear."
"I would like to have seen Montana..." Even if it's in the dark.
Never say never. Only a Sith deals in Absolutes!
Gods designs are amazing!
My quadcopter has night vision. I love it!
We have a sort of night vision. Our cones are basically turned off it it's too dark letting our rods take over. Most of us will close one eye in the dark because stereoscopic vision doesn't work too well at night. The rods in our eyes are super sensitive to low light. Closing one eye in the dark lets one eye paint a better visual picture in our minds then two eyes struggling to make a stereoscopic image.
Stefan was not talking about low light. He was talking about NO light (visible light).
You are right. I have been stuck in with low-light cloudy night and found my way cross-country for about 20 km. In low light conditions we see in black and white. Also one needs to look above something to see it clearly and not focus on it.
Closing one eye seems to be a way to protect one eye from a sudden blinding light.
Why can't we? We can. Some just forgot how
"...and even though humans will never be capable of this trick..."
Florida man with genetic design starter kit, aka DIY CRISPR: "...are you challenging me?"
Question in the thumbnail ' Because we're not salmon!😂
I do think that under certain circumstances humans can evolve echo location that helps with sight. I was abused pretty badly as a child and had to learn as a child how to move around the house without making a sound, so i wouldnt be beaten if i needed to use the restroom at night or something. Now as an adult i can feel people walking in the house and when people are outside my house. Not exactly on topic but i am able to move through the house without lights and know when something is in my way because of vibrations i feel and kind of hear.
I am just wondering where I can find more of Eric s. Work, I have been searching everywhere but I can not seem to find more. I do so enjoy Eric s talent in his expressions, filled with intrigue it has left me desperately in need to hear more. Please. There are many of us whom would be of great appreciation if we could find more of your great talent.
Not really night vision, but change in the spectrum. Night vision involves change in photoreceptor structure and layers after the receptors.
Night vision involves having vision in the dark no?
Night vision involves near infrared which is what this is. But it's not heat vision which is far infrared.
@@bforbiggy Not really. Some photoreceptors are designed for daytime, others not. Thus, the pigment within is used differently depending on the structure, blood supply, etc. At least in terms of non-insect eyes.
Cut the sides of your hair shorter that the top. It will look make you look better imo. Coming from receding hairline too😢
I had a 1968 Barracuda. It had night vision.
(Barely)
Came here because I’m addicted to fishing and want to go during the night 😂
Conflating being able to see a few nanometers further into infrared towards 700-800nm with having 'nightvision and 'see heat' (which is more 10x further away, in the 10μm range) is probably not entirely helpful. But it might help the salmons seeing security camera light brighter or maybe even remote controls :)
Go Go Sci Show!
eat salmon and try again 😅
If a bunch of pike liver is not enough, have they tried a ton
Always interesting, thank you.
maybe try eye drops of the salmon enzyme, or at a push an injection into the eye
Vitamin A2 Brute?
Dad Joke
why the apple? no fish will ever see one. is just an odd choice.
Seems like IR vision in mammals would be overpowered. Prey and Predator would stand out like a sore thumb.
Theyre called PVS-14's. A good 2100+ FOM elbit can go for 3400$
Just close one eye for a minute or two before the lights go out.
Is it just me or this video kinda mixes up night vision (seeing with very little light) with thermal vision (seeing far infrared) with extending the spectrum range to near-infrared?
Those are really different things. If the vitamin A2 extends the spectrum, it's very cool for all kinds of things, but would not give night vision.
What’s the difference between pigments, & melanin?
#SkinShouldntBeTheOnlyThingThatSeperatesPeoplefromPlacesThingsMelaninAndOrPignemts
Hrm, this study from the 1940’s must be why my mom thinks eating carrots is good for your eyes.
I turned on captions. "On this week's sideshow"😃
Turn on 'Salmon captions '.
My next question is why did salmon evolve to have such weird mouths
I eat salmon, does that count?
Time to buy me some Pike Liver and experiment.
its unlikely not never being educational you would think the script would be more open to the idea of human eyes changing over time seeing that the big idea is were evolved from apes and b4 that fish etc.
Because we can make night vision goggles. Salmons can't build cars and space shuttles either.
We can. But if we ever found out how, it would bankrupt big flashlight so the government is keeping it under wraps.
A couple of decades from now, there'll be humans with artificial/genetically modified eyes with:
▪ An implanted Sclerotic Ring (made of flexible Carbon Fibre) reinforcing both the eye's overall structure & the Iris, allowing for more fast-twitch nerve & muscle fibres in the Iris & the Lens attachment points - capable of reacting to shifts in light & focus at lightning fast speed.
▪ A synthetic *Tapetum Lucidum* (including an embedded Liquid Crystal layer, to switch enhanced night-vision on & off) made of ultra-reflective composite polymers (sandwiching Silica nano-spheres) covering the back of the Retina (making it approx. 50 times more efficient than a natural cats),
▪ Reversed Retinal Cells (like a squids), so no "Blind Spot"/Scotoma (from where the optic nerve connects the Retina). Also, both a much higher density of general Retinal Cells/cm & a significantly enlarged, deeper Fovea (the high-resolution area of the retina), which is much like a Falcon's eye. (Capable of tracking a bird on the wing, with the semi-opaque third eyelid protecting the eye & while diving down at a staggeringly fast 200km/h - Peregrine Falcons are amazing).There are also extra layers of optic cells which are sensitive to both Infrared & Ultraviolet. Finally, there's a dense mesh of cloned blood vessels, capable of diverting the blood flow to different Retinal Layers / Fovea to optimise vision under differing light conditions.
Thank you, this WILL help my fish educating along nicely. I'm not a fisherman but a fish educator.
😎
Are you going to teach the fish to see better with this newfound knowledge?
@@MrsBrit1 No, I teach them what NOT to try to eat.
Literally close your eyes for five minutes and then open them in the dark that's enough night vision, if you still see greenish blue fragments from the light you should probably talk to a professional...
Why are most fish silver?
So if I ate massive amounts of pike liver, I might be able to see in the dark? I know what the answer would be, but it would be interesting to say the least.
Salmon can tuna their vision
It made me want to eat pike liver now everyday until after 15 years I'll see radiowaves (don't ruin my dreams)
It's so nice of Kim Jong Un to take a time from his busy schedule to educate us about fish : P
Red is my favorite color, getting me some A2 or pike liver
When can we isolate the genes and injection them into human embryos?
Ok, remind me to get that salmon enzyme into my system via crispr.
12,560th viewer of this video!
Because we aint salmon? just a thought..
@t90official another reason to eat salmon
Hi. I'm Sammy the salomon 😊 woop woop
I thought the thumbnail was a black hole lmfao
How can the weather channel app track lighting strikes? I need a video on this; please don’t me become like the butt hair guy, because I can/will be.
I don’t remember a video like this… if ya’ll covered this before; then Can you link the video, because I forgot.
Seems eyes are just as unique as the animal them selfs
Because we are not salmon, DUH.
Not a very good approximation of red/green color blindness, which is what the dog and most mammals have.
It will take more than Vit. A2 for us see in the dark haha. Our bodies need to evolve like the salmon in the dark in order to have that capability. I wonder if salmon produce Vit. A2 naturally and if that has anything to do with them turning red at the end of their life??🤔
Riddick has entered the chat...
"Will never be capable" my ass.
4:12 Can we at least see the light that remote controls give off like our phone cameras do?
do our bodies do anything like this? where external stimuli can cause us to send different concentrations of vitamins to different organs?
Vitamins A2 spiking in 3, 2, 1...
"Bravo 6... going dark"
i always wondered if why people can't see in near complete darkness is they are so used to one way of seeing and that level of darkness rquires another? there isn't enough ligh to see color, or anything for that matter. but the eyes are still picking up enough of a signal to give a reslly rough idea something's there
Is it because I'm not a fish?
We are human like you said
Unless you're a cyborg or genetically engineered
Some Humans are actually capable of seeing in the dark naturally, so he is quite wrong. Figured he'd know that....
not particularly well. we're diurnal so our eyes are better equiped for daylight conditions. but yes some people have pretty good night vision and others are night blind.
usually though that has less to do with the eye and more to do with how our brain processes visual information.
@@LilFeralGangrel Im talking about very well, actually. Some people legit have eyes that look like Cat eyes, or an Eagle or something like that.....with the night vision to go along with it.
@@brentlionakaboldchamp no. that's not a thing that happens lmao.
@@LilFeralGangrel It actually is bro.
Bold of you assume I am not a salmon
time to eat some pike liver
I will eat that meat an see more :)
Wait for China crisper to do it😂
Within 5 hours!
I want to tune my vision
I am now on a regiment of A2
You can't do that? 👀
_"Salmon Can Turn on Night Vision. Why Can’t We?"_ Because we aren't salmon? I wasn't at least last time I checked.
Never say never.
Photo Pikmins.
Its because of the one thing that has to do with that other thing with the one thing so uhm yeah it is like that thing
We need more A2 production
Sending love to Hank ❤
before watching: why salmon, specifically? like, why would a literal FISH need night vision?
edit: it got answered at 2:18
That's not night vision goggles. They still work at visible wavelengths. You're taking about infrared vision.