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birdman 6 year s ago
#3... Concrete no longer lasts? No way! Modern concrete lasts way longer than 50 years in fact it is constantly getting harder ... never stops. Unless not mixed right in the first place Check out what the Germans built 70 years ago on coast lines .... not even phased after 75+ years
Bound Books
Before bound books, civilization mostly used stone tablets or scrolls. However, by the first century CE, Romans developed the codex which was bound papyrus or parchment together. However, books really didn’t catch on until the fifth century CE.
-1
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birdman 6 year s ago
#3... Concrete no longer lasts? No way! Modern concrete lasts way longer than 50 years in fact it is constantly getting harder ... never stops. Unless not mixed right in the first place Check out what the Germans built 70 years ago on coast lines .... not even phased after 75+ years