Mind Matters Reporting on Natural and Artificial Intelligence

TagConvergent evolution

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Frog with Turtle and Snail

To What Extent Does Life Simply Invent Itself As It Goes Along?

The evidence may surprise us

According to a popular anti-creationist website Talk Origins, one of the strongest pieces of evidence for evolution and common descent is the phylogenetic signal. In their view, when we look at specific properties across multiple species — number of legs, presence or absence of wings, the presence of a gene, a configuration of nucleotides in the genome, etc. — such properties will form a strongly nested hierarchy. We should expect to see such a strongly nested hierarchy if organisms evolved from one another and therefore a “family tree” links all the organisms together. However, if a property that appears only on a branch, it will be shared only by that branch’s leaves. Leaves on a different branch will not have…

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Closeup of housefly

Human, Mouse, and Fly Brains All Use the Same Basic Mechanisms

The study of brains in recent decades has yielded a very different picture from the patterns we might have expected

With differing outcomes, of course: A new study led by researchers from King’s College London has shown that humans, mice and flies share the same fundamental genetic mechanisms that regulate the formation and function of brain areas involved in attention and movement control. News Centre, “Humans and flies employ very similar mechanisms for brain development and function” at King’s College London (August 3, 2020) We might have expected a gradual increase in size and complexity, corresponding with ability, leading up to the human brain. But we have learned from recent research that lemurs, with brains 1/200 the size of chimps’, pass same IQ test (the Primate Cognition Test Battery). Human intellectual abilities are orders of magnitude greater than that of…