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Monterey Bay Aquarium
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Origami Around
Fieri Frames
Color Me Curious
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Discoholic đŞŠ
cherry valley forever
I'd rather be in outer space đ¸
todays bird
h
izzy's playlists!
EXPECTATIONS
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@twobroschillinginahottub
When your hamster shoves an entire stick of zucchini in his cheek and then goes about his day. đ¤Ł
âHeâs not going to fit that in his cheek.â
âOh, heâs chewing it, itâll be smaller.â
âHe canât possibly-â
âshit, I guess he can.â
these posts have the same vibes imo đŻ
and this tweet as well
this also
Just so you know, whenever we invent yet another fake fandom character, they inadvertently blink into existence, ill-formed and meaningless, only to be trapped within the hellish liminal space created by the zeitgeist of our collective consciousness.
need a girl to groom my fur until i am buoyant enough to swim
hey liz what does this mean
the bunnies did the lady and the tramp kiss. help iâm crying
enemies to lovers
Let's all agree to stab Caesar!
Do your part and stab him!! (make this 38.3%)
Agree but hide in the back and let everyone else do the work (make this 61.7%)
Sleepy boy
(via)
Do you ever eat popcorn out of the palm of your own hand with such ardent desperation that you feel like both a wild horse and the gentle schoolgirl feeding it treats to gain its affectionÂ
Hey there guys. Itâs me, in 2022, commenting on this post from 2016. Thereâs been a lot of people on this site lately being like âoooh no donât make viral uwu Iâm so pathetic, little, and defenseless and my poor notifications canât handle 10k reblogsâ well first of all ALL of us are pathetic, little, and defenseless and secondly none of our notifications can handle 10k reblogs and thirdly Iâm not a coward and I think this should have a million notes. Not because of its own merit as a post, I just think itâd be funny if when I turn 30 this year and I reflect on the greatest accomplishments of my life thus far, I have to at least consider putting âfamous tumblr popcorn postâ on the list
reminds me of when some old church in Sweden was cleaning out their storage and they forgot they had left like 80 medieval corpses in some ikea bags during renovations so somebody opened a closet door and itâs just
Palle-Jooseppi, a male brown bear at Ranua Zoo in Finland, wakes up after winter hibernation. Although they are not full hibernators, and can be woken easily, brown bears do like to den in a protected spot, such as a cave, crevice, or hollow log, during the winter months. Picture: Kaisa Siren / Rex Features
God-tier account of a Cambridge computer scientist trying to get police to investigate his bike theft camera footage:
this site really did suck so fucking bad when its demographic was straighter
i don't believe such a time ever existed
this post always kills me bc iâm like 90% sure the picture behind him is this:
cant believe women are expected to like cook and birth entire children and be professional workers and fit a beauty standard. like i am not going to do any of that lol
Why did we ever stop wearing 18th century clothing
to wear 19th century clothing you Georgian rake
The vampires are fighting
rb this with ur opinion on this shade of pink:
This is magenta, and not pink. Unlike pink, magenta doesnât actually exist. Our brain just invents magenta to serve as what it considers a logical bridge between red and violet, which each exist at opposite ends of a linear spectrum.
TL;DR this color is fake (and also I hate it)
Wait til you learn about Stygean Blue
Your brain is a badly-designed hot mess of bootstrapped chemistry that will tell you that all kinds of shit is happening that has no correlation to physical reality, including time travel. It just makes things up. Your brain is guessing about whatâs happening when your eyes saccade, whatâs happening in your blind spot, and what the majority of the visible light spectrum looks like, and you donât know itâs happening because it doesnât aid your survival to become aware that a lot of what you see is fake.
The human eye only has three types of color sensitive cones, which detect red, blue, and green light. Your brain is making up every other color you perceive.
Letâs have a little fun with that thought. This is the visible spectrum of light.
You will of course note that yellow is on the chart. Yellow has a discreet wavelength, and is therefore a distinct physical color. But we canât see it.
âSorry, what the fuck?â
What we call yellow is just what our brain shrugs and spits out when our red and green cones are equally stimulated. We have light receptors that can pick up on the physical spectrum of light we call yellow: thatâs why yellow things donât just look like moving black blocks to us. But your brain has no fucking idea what the color yellow looks like.Â
Some animals have eyes that can perceive the color yellow! Goldfish have a yellow cone in their eyes. If they could talk, they could tell us what yellow looks like. But we wouldnât be able to understand it.
What your brain actually sees of the color spectrum:
We can measure the wavelength of light, so we know that when we see âyellow,â we are seeing light in that 550-ish nanometers range. But we donât have a cone in our eyes that can pick that up. Your brain just has a very consistent guess about what color that wavelength of light could be. We decided to name that guess âyellow.â We canât imagine what yellow really looks like any more than a dog can imagine the color red.
Hereâs the funny thing: your brain is never perceiving just one photon of light at a time. Something like 2*10⸠photons per second are hitting your retina under normal conditions. Your brain doesnât individually process all of them. So it averages them out. It grabs a bunch of photons all coming from the same direction, with the same pattern, and goes, âyeah, that cup is blue, fuck it, next.â
Thatâs how colors blend in our eyes. So sure, if a photon of light with a wavelength of 550 nanometers bounces into our eyes, we see what we call âyellow.â But if we see two photons at the same time, coming from the same object, one of which is 500 nms and the other of which is 600 nms, your brain will average them out and you will still see yellow even though none of the light you just saw was 550 nms.
So how does magenta factor into this?
Well, as weâve just established, when your brain sees light from two different slices of the visible light spectrum, it will try to just average them together. Green plus red is yellow, fuck it. If itâs more red than green, weâll call that âorange.â Literally who gives a shit, weâre trying to forage over here. There are bears out here and itâs so scary.
What happens if you take the average of blue and red light, which we perceive to be magenta? Whatâs the centerpoint of that line?
Fucking green.
Hey, thatâs not gonna work? We live on a planet where EVERYTHING IS GREEN. If something is NOT green, that means itâs either food, or a potential source of danger, and either way your brain wants you to know about it.
So your brain goes, WHOOPS. Okay - this is fine. We already made up yellow, orange, cyan, and violet. Weâll just make up another color. Something that looks really, really different from green.Â
And so it made up magenta.
So, physics-wise, is magenta âreal?â
No; thereâs no single wavelength of light that corresponds to magenta. But youâre rarely seeing only a single wavelength of light anyway. And even when you are, every color other than RGB is a dart thrown on the wall by your meat computer. This is the CIE Chromaticity Diagram:
Explaining this thing is a little more than I want to take on on a Saturday morning, but Iâve included a link above that goes into it a little more. The point is that only the colors that actually touch the âoutlineâ of the shape actually correspond to a specific wavelength of light. All of the other colors are blends of multiple wavelengths. So magenta isnât special.
Given that color is just a fun trick your brain is playing on you to help you find food and avoid danger, is magenta real?
Yeah, absolutely. Or at least, itâs just as real as most of what we see. Itâs what we see when we mix up blue and red. It would be disastrous from a survival standpoint to perceive that color as green, so we donât. Because itâs not green. Light thatâs green has a wavelength of around 510 nm. Stuff thatâs magenta bounces back light that is both ~400 and ~700. Your brain knows the difference. So it fills in the gap for you, with the best guess it has, same as it does with your blind spot.
The perception of color exists within your brain, and your brain says you see magenta. So you see magenta.
So I googled Stygian Blue andâŚ
Yall.
FORBIDDEN.
HOW TO SEE THE FORBIDDEN COLOURS
Hyperbolic Orange is the color my soul is
Dark tumblr show me the forbidden colors
We are back on this again.
My brain hurts.
i fucking love the human brain, itâs like if bethesda made an animal
I REPEAT:
And this is all just talking about color! As soon as you start adding in shapes, things go even crazier. Because visual processing of outlines and boundaries starts in the eye itself, and gets even more complicated from there. Iâll stick with just that retina level of visual processing at the moment, and talk about lateral inhibition.
Take a look at this:
These are Mach bands: a series of flat grays, each vertical stripe is one shade. But they donât look quite like that, do they? They look lighter on the left edge, and darker on the left. This is because the light-sensing cells in your eye donât just report exactly what they see. The signals they send are in competition with those that sit beside them. The more theyâre stimulated, the more they inhibit their neighbors.
So if you have a bright shade next to a darker one, the light-sensing cells pointing at the bright shade will win out over the ones pointed at the darker shade, and less of the darker shadeâs signal will get through to your brain.
Why the hell does this happen? Donât we want to accurately see whatâs going on? Nope! We actually donât. It would be far more difficult to identify the outlines of objects without this post-processing step. It exaggerates subtle differences in shade, helping you pick out objects that blend in with their environment.
This adaptation is so useful, itâs found across the animal kingdom. Weâve known since the 50s that horseshoe crabs demonstrate lateral inhibition. We donât just experience lateral inhibition in vision. Itâs also present in how we process other senses! Touch, sound, and even smell all experience some degree of lateral inhibition, but itâs harder to intuitively demonstrate those over Tumblr.
And again, lateral inhibition in vision takes place in the eye. We havenât even gotten to the brain here! Thereâs far more complex post-processing, edge-finding, and motion tracking that occurs in the visual cortex. But Iâll leave it here for now.
