Human eye site is such a crazy phenomenon. The earliest form of human eyes were simply a light sensitive patch, only being able to differentiate between light and dark. There were no colors involved in that light sensitivity, we had not evolved to the point where we could see colors. And that is absolutely fascinating, the fact that we once were only able to black and white information. Although it does explain some of the pieces of our eyes. Inside the pupil, there are these microscopic cones and rods. The rods help us to see the black and white information around us. There is no color involved in that process, the rods just tell the shape of things, and also the light and shadows on them, as they are light sensitive. Now the cones are what helps us process colors. Most people call them color receptors, I do it too, but they aren’t color receptors, they are light receptors, because color is just visible light. Humans have three types of cones in our eyes, blue, green, and red. Cones require a lot more light for us to truly see color, that’s why at night we see in this kind of gray-scale, because there isn’t enough light for the cones to properly determine what color we are seeing. Rods require much less light to work, hence only giving us the black and white information of what we see. And all of that is millions of years of evolution. Like humans didn’t even have eyes 600 million years ago, which does seem like a long time, but it’s really not. The earth is 4.54 billion years old, just to put that into perspective. The human eye evolved so fast for that amount of time. The human evolved into what it is now in less than 100 million years. That is absolutely crazy. And it is so cool. It’s insane how fast that was. And now I probably have to go back and explain how we see all these different colors with only blue, green, and red cones. Each cone has this overlap in what it can detect, they are just named after what they are most sensitive to. Like we can see the color yellow when the red and green cones are being stimulated. Which doesn’t make any sense when it comes to color theory but it’s still really cool. Another thing about color theory, green is not a primary color like blue and red. The primary colors are blue, red, and yellow. Green is considered a secondary color. The thing is, the green and red color cones have over 100 more photoreceptors than the blue color cone. So humans, at one point were simply a dichromatic species, instead of trichromatic like we are now. This stuff is so cool, absolutely mind boggling.