00:00Look who it is – the one and only Timothee Chalamet!
00:04Two things we know about his looks – he has a gazillion lookalikes in New York City,
00:09and he possesses an androgynous beauty.
00:11You wanna see some proof?
00:12Alright, let's zoom in on his face and focus on his eyes, nose, and mouth.
00:17Now let's erase his stubble and double this picture.
00:21On the left side, we'll increase the contrast between his eyes and lips and the rest of
00:25his face.
00:26On the right side, we'll do the opposite by decreasing the contrast.
00:31Can you see any difference?
00:32Does Timothee look more feminine or more masculine in one of the photos?
00:37According to a researcher named Richard Russell, facial contrasts significantly contribute
00:42to how we perceive male and female faces.
00:46Female faces tend to be more attractive when their facial contrast is increased, while
00:51male faces are perceived as more attractive when their contrast is decreased.
00:57What if I told you that Margot Robbie could be in the same room as you in just a few seconds?
01:02Trust me, all you have to do is focus on the red dot in the middle of this creepy image.
01:07In a moment – not just yet – I will ask you to look at your ceiling and blink super
01:12fast.
01:13Keep watching, and you will see Margot Robbie right above you.
01:17Wait just a little longer, and… go!
01:20Look at your ceiling and start blinking.
01:22Do you see Margot?
01:24If you did, let us know in the comments below!
01:28Optical illusions are all around us, more than we realize.
01:32Think about those crazy viral 3D billboards that look like products, animals, and other
01:38things jumping right in front of our faces.
01:41What is really strange about them is that we see those images in 3 dimensions, but we
01:46don't need those funky 3D glasses with red and blue lenses.
01:50The secret behind this trick lies in a popular optical illusion called forced perspective.
01:56Yep, it's the same technique tourists use when they want to snap that classic photo
02:01that looks like they're holding up the Leaning Tower of Pisa.
02:04Please don't.
02:05What happens is that our eyes, which are slightly separated, each see the world from a slightly
02:11different angle, which is known as binocular disparity.
02:14Our brains then combine those views to create depth in the images we see every day.
02:20So, 3D billboards are trying to copy that.
02:23That's why they always have curved displays with two faces.
02:27This way, animators can present similar images from two slightly different angles on each
02:32screen to create a 3D illusion.
02:37That's weird.
02:38Here we have half Anya Taylor-Joy and half Beyonce.
02:42But hey, were their photos taken from the front or from the side?
02:46The correct answer is head-on, since they're both looking straight at the camera.
02:50But because the photos are cropped into side-profile silhouettes, it totally seems like they're
02:56facing sideways.
02:57Wanna make things even weirder?
02:59Let's hide the photos and just leave two black silhouettes.
03:04Now what do you see?
03:05Two people looking at each other.
03:07Or a vase in the middle.
03:09This is a classic optical illusion called Rubin's vase.
03:13It was created around 1915 and is a famous example of an ambiguous image.
03:19It all depends on how our brains interpret the contours and the context of the image.
03:24If the context is the black color, you will see two people.
03:28If the context is yellow, you will see the vase.
03:31But there's no right or wrong here.
03:34Keep staring at the center cross.
03:36I know, I know, the image is sickening, kinda literally.
03:39But you've come this far in the video, so don't quit now.
03:43Just keep focusing on the cross for a little longer.
03:46On the count of three, we will switch it to a photo of Shakira.
03:50Ready?
03:51One, two, three, and… wow!
03:54Ok, Shakira's hips don't lie, but they're totally moving!
03:58This motion doesn't make any sense since this is a static image.
04:02So what's happening?
04:05This process is known as the waterfall illusion.
04:08It's basically a motion after-effect that happens when you look at a stationary object
04:13after staring at something moving in one direction for a while.
04:17The name comes from the same experience you get after watching water in a waterfall move
04:21in one direction for a couple of seconds.
04:24When you stare at something moving in one direction, like the water in a waterfall,
04:29your brain's motion sensors focus on that downward motion.
04:33But after watching it for a while, those neurons get a bit tired of seeing the same
04:38downward movement and become less sensitive to it.
04:41So when you finally look away, the neurons for the opposite motion, in this case upward,
04:47suddenly seem extra active by comparison.
04:51A similar thing happens here.
04:53Check out this dove.
04:55Even though the sky is red and looks kinda bizarre, the dove is pure white.
05:00But keep staring at it, and something creepy will happen.
05:04In just a couple of seconds, we're going to change the sky to white, and the dove will
05:08look strange.
05:10Are you ready?
05:11Here we go!
05:13Boom!
05:14If you are seeing what I'm seeing, the dove now appears to be red, more like a faint version
05:19of the red from the original background.
05:21This effect is called positive afterimage.
05:24And you wanna see something even cooler?
05:27If we keep flipping back and forth between the two images really quickly, the effect
05:31gets even stronger.
05:33Can you see it?
05:35Now look over here at this dot.
05:37This illusion is known as the stepping feet, and you'll see why it has that name in just
05:41a couple of seconds.
05:43What you see here are two feet, one blue and the other yellow, moving smoothly and quickly
05:48in a horizontal line.
05:50Now let's see what happens when we change this flat gray background by adding vertical
05:55stripes across the screen.
05:57Notice how it looks like the feet are taking little steps, one at a time, right?
06:02So why does this happen?
06:04It's all about contrast.
06:06When the blue foot passes over the white stripes, the dark blue against the bright white stands
06:11out, making it look like it's moving faster.
06:15But when it crosses over the black stripes, the contrast drops, which makes it seem like
06:20it's slowing down.
06:22The yellow foot does the opposite – it looks faster on black and slower on white.
06:27Now if we take away the stripes, there is no contrast shift to mess with our perception,
06:32and the illusion disappears.
06:35This optical illusion is the last one on our list, and there's a good reason for that.
06:40It can have effects that stick around for a long time, like hours, weeks, and some people
06:45have even reported effects lasting for almost 3 months.
06:49So are you ready?
06:51Close your eyes for a second.
06:53Great, now open them.
06:55Look at this image and keep staring.
06:58At first glance, it looks like a bunch of stripes, both horizontal and vertical, in
07:02the background.
07:03But these aren't just any black lines.
07:06If you want to experience the lasting effects, you need to stare at it for at least 3 minutes.
07:11So if you're feeling brave, go ahead and pause the video to set a timer.
07:16Next step.
07:17Look at this red picture.
07:19Focus on it.
07:20Again, to make the effect last longer, you should look at it for about 1 and a half minutes.
07:25Feel free to pause the video so you can stare longer.
07:30Now we have this green picture, which is very similar to the red one.
07:34Keep staring at it.
07:35If you want to test its maximum power, so to speak, pause the video and look for a minute
07:41and a half.
07:43Awesome!
07:44Now we come to the grand finale.
07:46We're back to square one with the black and white picture.
07:49Did the effect work for you?
07:51You might see red and green hues in this picture this time.
07:54But we promise you, we didn't make any color changes.
07:57It is all in your mind.
08:01That's it for today, so hey, if you pacified your curiosity, then give the video a like
08:05and share it with your friends!
08:07Or if you want more, just click on these videos and stay on the Bright Side!
