What Do You See Brain Games

Author:

National Geographic

Keywords:

brain games,national geographic,nat geo,natgeo,animals,wildlife,science,explore,discover,survival,nature,culture,documentary,brain,mind,tricks,magic tricks,interactive entertainment,experiments,street magic,riddles,illusions,critical thinking,Brain Games,Perspective,brain video,games,light,interpretation,The Effects of,Light on Your Brain

Subtitles:
whether it's the bright lights and dazzling colors of the Las Vegas Strip or the blinding Sun that forms this desert Mirage all too often it's the simple illusions of light and shadow that warp your brains perspective of reality to show you what we mean let's play a game take a look at this desert halfway around the world what do you see a bunch of big camels right except there are no big camels those camels are really shadows thrown by the actual camels which are the light brown figures on the sand this photo by National Geographic photographer George Steinmetz is a perfect example of how your brain makes snap judgments about perspective your brain has a tendency to assume that whatever you're looking at must be at eye level after all you're probably only used to seeing camels from one angle the ground which is why you might have mistaken these black shadows for actual camels but it only takes a split second of closer analysis for your brain to perform what scientists call mental rotation this is your brains way of creating a 3d image of what you're seeing and then mentally changing the angle to give you a better point of view whether it's a deceptive camera angle forced perspective or a trick of light and shadow the slightest change in perspective can cause your brain to leap to false conclusions so you're about to see this next experiment take a look at this image full of bumps and craters how many bumps do you see go ahead and count them got your answer did you save for bumps keep a close eye on the image because we're going to turn it upside down now how many bumps do you count has the image changed to show six bumps how did flipping this image 180 degrees change the craters into bumps and the bumps into craters it all has to do with your brain and the Sun here to explain is Professor Jim cone of the University of Virginia over hundreds of thousands of years of human evolution people use the Sun to help determine time of day and location so your brain instinctively understands light comes from a single source above us and that shadows are created by the lights direction when your brain sees lighter shading on top of the circle and darker shading at the bottom it assumes the darker shading is a shadow cast by a light source above and behind the object meaning that circle must be about but in the case where there's darker shading up top that means light isn't hitting that area which is a signal to your brain that this circle must be a crater light shading and shadows help your brain give three-dimensional shape to the flat 2d image of the world projected onto your retinas to enhance that 3d perspective your brain also analyzes the distance depth and height of everything around you

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