A river fishing trip turns wild when the crew targets bull sharks far from the ocean. After using big mullet bait in freshwater, the rod finally goes off and a shark surfaces beside the boat, turning ...

Bull sharks possess one of the most extreme biological adaptations in the animal kingdom, allowing them to survive in both saltwater and freshwater environments that would kill most marine predators .

Don Juan Pond is a mysterious lake in Antarctica that contains so much calcium chloride, it doesn't freeze in subzero ...