The Hranicka Abyss is at least 1,325 feet deep, and likely goes down further. — -- A team of explorers believe they have discovered the deepest known underwater cavern the world in eastern Czech ...
A National Geographic Explorer's search for Cleopatra's tomb got a big breakthrough. Kathleen Martínez has spent the last 20 years searching for the lost tomb of Cleopatra. Her work is part of a new ...
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