In physics, the twin paradox is a thought experiment in special relativity involving identical twins. 

One twin makes a journey into space in a high-speed rocket. Eventually she slows, stops, turn around and heads for home, to find that, during what seems to be a brief trip for her, her twin on earth has become old. 

This is a list of several twin traveller landings on Monastiraki flea Market, Athens, Greece.

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