They might not have a photographic memory of every detail on a page, but rapid recall is surely a sign of intelligence as our society defines it.

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Each is equipped with a high definition photographic memory of the virus it helped destroy and it is primed and ready to prevent subsequent infection - but only if it encounters the same virus.

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His ten-person team of researchers at Cold Spring Harbor Laboratory has battled Kandel to a draw by producing, in a dramatic series of experiments, fruit flies with photographic memory.

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