If the ratio is higher than that, the densest possible pack requires that some of the spheres pack in the middle without touching the cylinder's walls, and that is "more complicated," Chan says.

陈认为如果比例超过上限，要想包装紧密就必须使中间的一些球体不接触圆柱壁，更加复杂。

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Those areas, however, are primarily in the economic and social spheres and the sorts of changes that would result (higher taxes on the wealthy, higher spending on social services) would make most people in the West go batty.

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These spheres can only be formed in very high temperatures - temperatures higher than those reached in the fires in the towers before their collapse.

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