Thinking about the brain

Have you been listening to A History of the World in 100 Objects? It's compelling listening for anyone interested in our species and our world.

It's also so refreshing to have it in purely audio form rather than on TV. As soon as video cameras get involved, they hijack the whole thing and all too often we end up with video cliches. When it's purely audio, it relies on the descriptive powers of the speakers.

Anyway, one fascinating insight is that although human beings have so much DNA in common with primates such as chimps, our brains are asymmetrical whereas other primate brains are symmetrical.

Another is that, according to the programme, fMRI shows the brain areas involved with speech overlap with the areas activated for knapping stones (chipping stones to make tools). The hypothesis from this is that stone knapping and speech co-evolved.

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Professional Thinking and Writing