Secrets In The Jungle, Secret Structures Of Guatemala

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Archaeologists identify a site containing unknown structures. A lake full of jellyfish is studied and Argentinian researchers make a discovery.

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Archaeologists find an ancient structure built on granite columns, puzzling stone spheres are found in Costa Rica and Mexican skeletal remains emerge.

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In Madagascar, paleontologists discover an near-perfect fossil unlike any known animal, and bizarre stone spheres are found in Costa Rica.

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In the depths of the tropical lowlands of Northern Colombia, scientists discover a gargantuan, unidentified animal vertebra.

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In the Philippines, archaeologists discover the remains of an ancient rhinoceros. Elsewhere, a Brazilian island is infested with thousands of vipers.

In the northwestern Pacific, a tourist discovers a mysterious structure. Elsewhere, an unsettling sight is revealed on the island of New Guinea

A mysterious creature that glows in the dark is discovered in the Australian rainforest. Hundreds of human bones are found in a Belizean cave.

A mysterious site with huge stone blocks is discovered off the coast of Tanzania. In the Guatemalan rainforest, hundreds of human bones are found.

A volcanic island called Kolombagara, with a secret cave, rises out of the Pacific Ocean. In Vietnam, bones from an unknown animal are found.

A cave bursting with bones is found in the jungles of Mexico. In Hawaii, archaeologists find unusual sculptures with big heads and bulging eyes.