dimanche 27 septembre 2015

2 Different Core-types?

Hello everyone, :)

I stumbled across following image and wondered about the different appearances of the cores:

Were the cores more dense during construction?
That would explain why the tower with the crane on top seems to have a much more dense core.

Or is that just an optical illusion? :confused:



via International Skeptics Forum http://ift.tt/1Lf6Xri

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