ANSWERS: 4
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The adult human brain usually weighs between 1 and 1.5 kg (three pounds) in an average volume of 1,600 cm³.
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2-3 pounds.
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An adult's brain weighs = 1,300 - 1,400 grams An infant's brain weighs = 350 - 400 grams
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That really depends, I've come across some that weigh less than a pea and are smaller than one too
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