Did ancient civilizations have electricity? This 2,000-year-old artifact suggests they did. (02:52-03:31)
What happens when primitive tribes encounter advanced technology? (04:16-05:43)
This ancient map accurately depicts Antarctica, centuries before it was explored. (07:58-09:06)
Is this ancient Mayan carving proof of extraterrestrial visitors? (20:14-21:19)
These 500-year-old frescoes show something unbelievable in the sky. (21:50-23:13)
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