The things that happen when history is postponed...

#1 The Popeye Papyrus.

#2 Physics laws that (consistently) don't work. They just determine future failure. God is a lug-bolt the end.

#3 Unexplained structures, perhaps created by aliens, like the Eiffel Tower.

#4 Unexplained and doubly-unexplained construction methods, like how to lift the beams for the Eiffel Tower before perpetual motion machines?

#5 Inconsistency. Why was there (perhaps?) little known archeological evidence at the site of the Grand Kalifa?

Etc.