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Statue of Liberty buried in ice in The Day After Tomorrow

How Long Would It Take for Evidence of Our Civilisation to Disappear?

In discussing the possibility of lost civilisations, the question is often asked: if there was an advanced civilisation in antiquity – say, more than 10,000 years ago – how much evidence would actually be left for us to find? The above video covers this in asking the question, what would happen if humans disappeared from the planet:

After 10,000 years, the only reminiscence that people were here someday, will be the remains of a few stone constructions, among which [would be] the pyramids in Egypt and the Great Wall of China. Mount Rushmore National Memorial will be there almost intact for several hundreds of thousands of years.

(via Gizmodo)