6,000 years ago — long before the pyramids — ancient builders in Spain created something that still leaves engineers speechless today. The Dolmen of Menga is a massive stone monument so precisely built, no one’s sure how they pulled it off with Stone Age tools. It’s a doorway into the minds of people who understood the Earth, the stars, and stone like few ever have. Let’s uncover the impossible engineering behind this prehistoric wonder.

Learn more about your ad choices. Visit megaphone.fm/adchoices