Dinosaurs had bigger heads than humans. Even bears can have bigger heads than humans. It seems unlikely that head size is the limiting factor for a Great filter. There seems also no reason why a brain has to be located in the head and not in the torso.
A thought occurred to me that it’s more likely that a brain initially develops near major sensory input channels. Dinosaurs did have secondary brains thought but their function is also proximity based (ie reflex time gets too long for just one brain location in that sized body).
I could guestimate that the primary constraint is eye to brain distance and the other senses are near because of lessened wiring and easier time integrating the information the nearer to a pointlike approximation one gets. That is if the information itself doesn’t require a spesific placing.
Dinosaurs did not give birth and bears don’t have a particularly big head to body ratio—the idea here is specifically that childbirth is hard and dangerous, not simply running around with a big head would be so.
As for the brain, I think having eyes close to mouth is useful to basically every animal, being able to hit food or enemies with the mouth accurately, and eyes came from brains.
There no reason why species on other plants who are intelligent have to give birth. Yes, humans do but to be a great filter it would have to be true more universally.
Precisely. I am trying to say that giving birth means intelligence has a downside, and that could have paradoxically lead to intelligence getting more widespread due to the downside meaning the need for more intense competition.
Dinosaurs had bigger heads than humans. Even bears can have bigger heads than humans. It seems unlikely that head size is the limiting factor for a Great filter. There seems also no reason why a brain has to be located in the head and not in the torso.
A thought occurred to me that it’s more likely that a brain initially develops near major sensory input channels. Dinosaurs did have secondary brains thought but their function is also proximity based (ie reflex time gets too long for just one brain location in that sized body).
I could guestimate that the primary constraint is eye to brain distance and the other senses are near because of lessened wiring and easier time integrating the information the nearer to a pointlike approximation one gets. That is if the information itself doesn’t require a spesific placing.
Dinosaurs did not give birth and bears don’t have a particularly big head to body ratio—the idea here is specifically that childbirth is hard and dangerous, not simply running around with a big head would be so.
As for the brain, I think having eyes close to mouth is useful to basically every animal, being able to hit food or enemies with the mouth accurately, and eyes came from brains.
There no reason why species on other plants who are intelligent have to give birth. Yes, humans do but to be a great filter it would have to be true more universally.
Precisely. I am trying to say that giving birth means intelligence has a downside, and that could have paradoxically lead to intelligence getting more widespread due to the downside meaning the need for more intense competition.