Geologists studying ancient desert rocks have stumbled on a microscopic tunnel system that looks uncannily deliberate, a ...

Buried in the limestone and marble of Namibia, Oman, and Saudi Arabia, scientists have found mysterious micro-tunnels, too ...

Leonardo da Vinci excelled in the fields of art and science, but the Italian polymath was also a highly skilled expert in military structures and defensive systems, breaking new ground in the strategy ...

Massive tunnels have been discovered in South America, but what animal made them? Learn about the tunnels created by ...

Hidden beneath the old bunkers at Fort Stevens State Park in Oregon is a network of long-abandoned tunnels. These labyrinths were well known to soldiers protecting America from German and Japanese ...

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