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A comment on Antikythera Mechanism: An ancient 'computer' that 'shouldn't exist' [video]. Parent comment
In terms of buildings, the longest one might be
https://en.wikipedia.org/wiki/Sagrada_Fam%C3%ADlia
Otherwise I would say science in general.
In terms of buildings, the longest one might be
https://en.wikipedia.org/wiki/Sagrada_Fam%C3%ADlia
Otherwise I would say science in general.