yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Watch: How Animals and People See the World Differently | National Geographic


2m read
·Nov 11, 2024

[Music] What most people think of when they look at the world, they think other animals probably see the world pretty much the same way. Only with time do we realize that, of course, other animals don't see the same things we see. That takes us to a sort of a philosophical question: what is the animal actually seeing?

It's impossible to know because it goes into a brain that's very alien to ours. It goes through processes that we don't use when we process visual stimuli. The animal does things with that information that we don't do, so it's really hard to know. The most simple eyes just tell an animal when it's light and when it's dark.

Then you got eyes like ours that have color vision and very, very good spatial vision and can see very complex detail. The development of eyes can be categorized into four stages, from simple to complex. Stage one is the simplest form: light falling on just a few photo receptors allows an animal to sense light and dark.

At stage two, organisms can now tell which direction light is coming from. In stage three, two distinct eyes appear. The first is a cued eye with more photo receptors; the second is a compound eye that adds more cups. Both types in stage three can produce crude images of objects.

In stage four, the most advanced eyes perform complex visual tasks. Lenses, corneas, and irises focus light on photo receptors, creating sharp, clear vision. This entire evolution, from simple to complex, could theoretically happen in less than half a million years.

People have asked me, um, if I could be any animal at all, what animal would I like to be? In terms of their vision, it would only be right to say that since I work on them so much of my time, I would really like to know how mantis see the world. Their perception of the world is so different, both in terms of their sense of color, their sense of parts of the spectrum that we don't see at all, and also the way that their eyes are multiple, so that each eye sees the same thing multiple times from different points of view.

I think I’d probably, if I got myself into the mind of a mantis, I’d have no idea what was going on, and I would never be able to tell myself, "Oh, this is how they see." That's the thing that I'm afraid of, but I'd still like to spend at least a few minutes seeing how a mantis sees the [Music] world.

More Articles

View All
How To Make $100 Per Day With Index Funds
What’s up, Graham? It’s guys here. So there comes a time in everyone’s life where you stop and think to yourself, “How do I make a hundred dollars a day investing in index funds?” Alright, fine, maybe it doesn’t exactly happen like that, but chances are …
Surviving Shok Valley | No Man Left Behind
All right, going away. I got two in the L right now when battle’s about to kick off, and it’s imminent. Definitely get a major shot of adrenaline. Um, because you can’t freeze at that point. We have trained for years to overcome that fight or flight sensa…
Sample size for a given margin of error for a mean | AP Statistics | Khan Academy
Nadia wants to create a confidence interval to estimate the mean driving range for her company’s new electric vehicle. She wants the margin of error to be no more than 10 kilometers at a 90 percent level of confidence. A pilot study suggests that the driv…
See the Remarkable Way This Veteran Is Healing from War | Short Film Showcase
I don’t consider myself a marathon runner. I’m not like the elite guys from Kenya and all those countries; that’s basically all they do. I’m a working man. I get up and go to work every day. I serve people, and that’s the most rewarding thing about my job…
Transforming nonlinear data | More on regression | AP Statistics | Khan Academy
So we have some data here that we can plot on a scatter plot that looks something like that. And so the next question, given that we’ve been talking a lot about lines of regression or regression lines, is can we fit a regression line to this? Well, if w…
Increased politicization of the Supreme Court | AP US Government and Politics | Khan Academy
In your mind, why is the Supreme Court important? Well, the Supreme Court is important for the original founders’ reasons, or that it was like all American institutions. There were ideas the founders had, and then John Marshall, an important justice, cre…