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The eye of an ostrich is bigger than its brain
The ostrich is the largest land bird in the world. But this is not its only singularity. The bird's eye is bigger than its brain. An ostrich eye weighs 47.6 grams compared to 42 grams for its brain. For comparison, on average, the human eye weighs 8 grams and the brain 1.5kg. Photo credit: Wolfgang Hasselmann
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