Mind Matters Natural and Artificial Intelligence News and Analysis

TagBrain size (impact)

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Extreme magnification - Jumping spider portrait, front view

Spiders Are Smart; Be Glad They Are Small

Recent research has shed light on the intriguing strategies that spiders use to deceive other spiders — and prey in general

Spiders, like octopuses, have eight legs. But they share something else as well — like octopuses, once we got around to studying them, they turned out to be much smarter than expected. What makes spiders even more unusual is that they are smart with very small brains: “There is this general idea that probably spiders are too small, that you need some kind of a critical mass of brain tissue to be able to perform complex behaviors,” says arachnologist and evolutionary biologist Dimitar Dimitrov of the University Museum of Bergen in Norway. “But I think spiders are one case where this general idea is challenged. Some small things are actually capable of doing very complex stuff.” Behaviors that can be…

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man before big brain

Can Science Really Engineer a Bigger Human Brain?

Computational neuroscientist Daniel Graham wonders why we would bother. There is no strict relationship between brain size and intellectual achievement

In a three-part series at Psychology Today, Hobart and William Smith College computational neuroscientist Daniel Graham, author of An Internet in Your Head: A New Paradigm for How the Brain Works(2021), tackles that question: First, most parts of the human brain are already larger than they should be for an animal life form of our size. But the difference is hardly commensurate with average human intelligence vs. average chimpanzee intelligence. Sure enough: Neuroscientists have struggled to explain what our extra brain mass actually accomplishes. The best guess seems to be that, at the species level, our extra brain mass allows us to store more lifetime memories. One piece of evidence for this is that bigger-brained (and therefore bigger-bodied) mammals also…