| 21. | Is it the weather, or evolution, or brain size, or avaliable resources?
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| 22. | Attempts to support these theories cited'scientific evidence', such as brain size.
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| 23. | One question that has been frequently investigated is the relation of brain size to intelligence.
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| 24. | Recent studies have shown that birds are pretty intelligent, despite their small brain size.
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| 25. | But it is still unclear why the number of IQ domains should correlate with brain size.
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| 26. | Studies demonstrate a correlation between brain size and intelligence, with larger brains predicting higher intelligence.
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| 27. | :Generally body mass correlates with brain size ( see brain to body mass ratio ).
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| 28. | Its brain size is about 850cc.
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| 29. | The greater size of the skull cavity overwhelmingly implies a greater brain size and exceptional intelligence.
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| 30. | "The increase of brain size relative to body size encephalization is intimately linked with human evolution.
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