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Divers followed a light through a tiny crack - then emerged into an underwater chamber more than 100 meters across

Jonathan and Todd follow renowned cave explorer Robbie Schmittner into a remote Mexican cenote that very few people have ever visited. More than half a mile from the entrance, and after roughly an ...
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Inside one of the world's largest freshwater collections, they found rare fish being raised to return to the wild

Jonathan visits the Tennessee Aquarium in Chattanooga, home to one of the world's largest collections of freshwater life and an extensive conservation program focused on native species. One of its ...