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The Israeli Defense Forces (IDF) released a video showing what it describes as one of Hamas’s "most complex" underground infrastructures extending beneath the southern Gaza city of Rafah. According to ...

At low temperatures, hydrogen atoms move less like particles and more like waves. This characteristic enables quantum tunneling, the passage of an atom through a barrier with a higher potential energy ...

Archaeologists have completed the first comprehensive technological mapping of an intricate underground tunnel system beneath the ancient Etruscan city of Veii, revealing a sophisticated network of ...

The Highway 99 tunnel in Seattle reopened to traffic three hours after a power outage forced a shutdown Thursday morning, the first time the 2-mile tunnel beneath downtown has ever completely closed ...