Countless secrets related to human civilization are hidden in the earth, whenever they come out, they surprise us. Something similar has happened in Croatia. Here archaeologists were excavating a grave, when a very old helmet came out from inside, seeing which everyone was shocked. It was found that this helmet is 2500 years old and is made of a different metal. Earlier in Italy also, scientists had found two helmets and a wall belonging to Greek civilization. According to a Live Science report, a team from the University of Zagreb…
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