Found during an excavation of a shipwreck in Sicily are metal ingots over 2600 years old made up of a mysterious metal compound. Could it be orichalcum, rumored to have covered Poseidon's Temple in the lost city of Atlantis? #AncientAliens Subscribe for more from Ancient Aliens and other great ...

How can a dagger from King Tut's tomb boast such modern craftsmanship? Ancient astronaut theory suggests aliens taught Egyptians advanced metallurgy techniques. #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more ...

This mysterious tool was found 30 feet in the ground and has a significant patina, evidence that it's quite ancient. Yet it seems to be made of aluminum, which was not invented back then. #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...