He Dug a 1-km Tunnel Without GPS — 2,600 Years Before Modern Machines

Описание: More than 2,600 years ago, an ancient Greek engineer accomplished something that still amazes modern engineers.
In the 6th century BC, Eupalinos of Megara was tasked with solving an impossible problem for the city of Samos:
how to deliver a secure, sabotage-proof water supply during wartime.
His solution?
Dig a 1,036-meter tunnel straight through a mountain — starting from both ends at the same time.
No GPS.
No lasers.
No computers.
No modern surveying instruments.
Using only basic geometry, sighting poles, and human calculation, Eupalinos aligned two excavation teams so precisely that they met in the middle of Mount Kastro — missing by only a few meters after more than a kilometer underground.
🎥 In this episode of Ancient Engineering Legends, we explore:
• Why Polycrates needed a hidden water supply
• How Eupalinos planned the tunnel with ancient geometry
• Why this was the longest tunnel of its age
• How modern tunnel boring machines compare today
• And why this achievement still humbles 21st-century engineers
This isn’t just ancient history — it’s a reminder that engineering brilliance doesn’t begin with technology… it begins with thinking.
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