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A Mexican archaeologist found a large amount of liquid mercury under a Mayan pyramid in Teotihuacan, America's most mysterious ancient city.Video: Ancient relics in the tunnel in Mexico
About 50,000 ancient relics have been discovered by archaeologists inside a sealed tunnel nearly 2,000 years ago.
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Why are there no male queen bees?
The mystery of the 'doomsday' cinema, built in the desert but not a single person has visited for more than 30 years
Mystery of dozens of giant circular structures at the bottom of Lake Michigan
US ship becomes world's largest artificial reef
Wreckage of mysterious missing bomber found after 80 years
Surprised to know the identity of the Russian missile debris 'hunter'
Australia releases chemical composition data of nearly 1 million stars
NASA shuts down plasma device to save spacecraft 20.5 billion kilometers away
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