AnimalsBirds
Pigeons shown microscope slides of breast tissue learned to sort cancerous from healthy samples.
Pooling the verdicts of a flock pushed accuracy to around 99% on slides they had never seen.
Source
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More animal facts
Animal facts are the ones people repeat at dinner. Sharks are older than trees, a headless chicken lived for eighteen months, and vampire bats remember who fed them. Every fact here links to the reference it came from.
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