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0.0000000000150 megatonnes is about two times as heavy as an Eye (Human)
In other words, it's 2.10 times the weight of an Eye (Human), and the weight of an Eye (Human) is 0.480 times that amount.
A fully developed eye (in a person over the age of thirteen), weighs about 0.00000000000710 megatonnes. The pupil of the eye varies depending on the amount of light it is exposed to, but typically measures about 4 mm across.
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