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454.960 pennyweights is about half as heavy as a Human Brain.
In other words, it's 0.5240 times the weight of a Human Brain, and the weight of a Human Brain is 1.910 times that amount.
(adult)
The average weight of an adult human brain is between 868 pennyweights. In humans and primates, sight and vision utilize about 30 different parts of the brain which together account for about half of the brain's size.
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