On the island of Sri Lanka, archaeologists investigate an ancient structure built on granite columns above the rain forest; bizarre stone spheres are discovered in Costa Rica; the curious remains of a small man are found in Chiapas, Mexico.

On the island of Madagascar, paleontologists discover an intact fossil unlike any known animal, living or extinct. Also, bizarre stone spheres are discovered in Costa Rica and the curious remains of a small man are found in Chiapas, Mexico.

In the tropical lowlands of Northern Colombia, a team of scientists discover a massive, unidentified animal vertebra; dozens of jars packed with bones are uncovered in Cambodia; a strange rusted vehicle is found on the small island of Peleliu.