Interest in Inca writing has been sparked by a theory that mop-like bundles of knotted string contain complex binary information that could open a new window on Inca history
For centuries, the mighty Incan empire has confounded researchers.

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A refuge in Tennessee is providing a natural setting for elephants that have made their living as entertainers
Only the tops of Sissy and Winkie's heads poke above the water at their swimming hole.

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