Do not use dietary supplements that contain iodine in the place of KI (potassium iodide). They can be harmful and non-efficacious. Only use products that have been approved by the U.S. Food and Drug Administration (FDA).
Mammoth Cave, the world's longest known cave system. The following is a list of the world's 10 longest caves per length of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data.he highest concentrations of long caves in the world are found in the Pennyrile of Southern Kentucky, USA, in the Black Hills of South Dakota, USA, and in the Yucatan YucatÃ¡n, Peninsula. mexico
Beneath the sandstone-capped ridges of Mammoth Cave National Park lies the most extensive cave system on earth, with over 400 miles of passageway mapped and surveyed. And yet after 5,000 years of intermittent exploration, the full extent of this water-formed labyrinth remains a mystery. Join us on this journey.