Dr. Darragh Ennis

And if you're in a competitive environment and you, as an animal, change colour, you know, you get a red stripe or something and suddenly that means the females are no longer interested in you. They're not going to mate with you because you've got this red stripe.

And if you're in a competitive environment and you, as an animal, change colour, you know, you get a red stripe or something and suddenly that means the females are no longer interested in you. They're not going to mate with you because you've got this red stripe.

And if you're in a competitive environment and you, as an animal, change colour, you know, you get a red stripe or something and suddenly that means the females are no longer interested in you. They're not going to mate with you because you've got this red stripe.

That's never going to be passed on because you don't reproduce and the mutation disappears and it's just literally thrown away from the population. But if it's the other way and the red stripe suddenly means all the females are interested in you, then gradually over time, you'll speciate. So you'll become the red striped version of your animal and you'll produce lots and lots of children.

That's never going to be passed on because you don't reproduce and the mutation disappears and it's just literally thrown away from the population. But if it's the other way and the red stripe suddenly means all the females are interested in you, then gradually over time, you'll speciate. So you'll become the red striped version of your animal and you'll produce lots and lots of children.

That's never going to be passed on because you don't reproduce and the mutation disappears and it's just literally thrown away from the population. But if it's the other way and the red stripe suddenly means all the females are interested in you, then gradually over time, you'll speciate. So you'll become the red striped version of your animal and you'll produce lots and lots of children.

And that's it. It's purely, this is the bit that people don't understand. It's not about growing bigger teeth to fight off the predators. It's just about, are you going to survive long enough to pass those genes on? And they're kind of like, you know, memes or viral things on the internet. You know, it doesn't necessarily have to be good. It doesn't necessarily have to be brilliant.

And that's it. It's purely, this is the bit that people don't understand. It's not about growing bigger teeth to fight off the predators. It's just about, are you going to survive long enough to pass those genes on? And they're kind of like, you know, memes or viral things on the internet. You know, it doesn't necessarily have to be good. It doesn't necessarily have to be brilliant.

And that's it. It's purely, this is the bit that people don't understand. It's not about growing bigger teeth to fight off the predators. It's just about, are you going to survive long enough to pass those genes on? And they're kind of like, you know, memes or viral things on the internet. You know, it doesn't necessarily have to be good. It doesn't necessarily have to be brilliant.

It just has to be popular. And that's it. Why do we sleep? Oh, that's a weird one, isn't it? So by any logical sense, anything that you think about, an animal going to sleep is a terrible idea. Like it's so bad for it. It makes you completely vulnerable.

It just has to be popular. And that's it. Why do we sleep? Oh, that's a weird one, isn't it? So by any logical sense, anything that you think about, an animal going to sleep is a terrible idea. Like it's so bad for it. It makes you completely vulnerable.

It just has to be popular. And that's it. Why do we sleep? Oh, that's a weird one, isn't it? So by any logical sense, anything that you think about, an animal going to sleep is a terrible idea. Like it's so bad for it. It makes you completely vulnerable.

And you would think that evolution of all things, this really strict, you know, filter that takes away anything that's dangerous will get rid of sleep. But It just can't. It seems to be deeply inbuilt into not just humans, but almost all animals, like flies sleep, fish sleep, dolphins and whales sleep, even though they have to breathe and all this kind of thing underwater.

And you would think that evolution of all things, this really strict, you know, filter that takes away anything that's dangerous will get rid of sleep. But It just can't. It seems to be deeply inbuilt into not just humans, but almost all animals, like flies sleep, fish sleep, dolphins and whales sleep, even though they have to breathe and all this kind of thing underwater.

And you would think that evolution of all things, this really strict, you know, filter that takes away anything that's dangerous will get rid of sleep. But It just can't. It seems to be deeply inbuilt into not just humans, but almost all animals, like flies sleep, fish sleep, dolphins and whales sleep, even though they have to breathe and all this kind of thing underwater.

And it seems so inbuilt to how our nervous systems specifically work. that we can't get rid of it. So the cost of getting rid of it is way too high. And if you ever meet someone who's sleep deprived, you very quickly realize why, because it just messes with us so badly.

And it seems so inbuilt to how our nervous systems specifically work. that we can't get rid of it. So the cost of getting rid of it is way too high. And if you ever meet someone who's sleep deprived, you very quickly realize why, because it just messes with us so badly.

And it seems so inbuilt to how our nervous systems specifically work. that we can't get rid of it. So the cost of getting rid of it is way too high. And if you ever meet someone who's sleep deprived, you very quickly realize why, because it just messes with us so badly.

Oh, I, it absolutely does. So our brain function completely relies on sleep. So we can't get completely to the bottom of this very easily because the ethical considerations of doing sleep deprivation studies means that they very rarely go past two or three days without sleep because it's so bad for you.

Oh, I, it absolutely does. So our brain function completely relies on sleep. So we can't get completely to the bottom of this very easily because the ethical considerations of doing sleep deprivation studies means that they very rarely go past two or three days without sleep because it's so bad for you.