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0.00273 megatonnes is about 2,000,000 times as heavy as a Human Brain
In other words, it's 2,020,000 times the weight of a Human Brain, and the weight of a Human Brain is 0.0000004950 times that amount.
The average weight of an adult human brain is between 0.000000001350 megatonnes. 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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