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Ancient and beautiful, sharks hunted the oceans before the dinosaurs walked the earth. Discover more about these remarkable animals, including biology, behavior, statistics, and trivia with these interesting shark facts. 1. For every human killed by a shark, humans kill two million sharks. 2. Sharks can smell one drop of blood in 25 gallons (95 L) of water up to 3 miles (4.8 km) away. 3. Sharks are the only fish that can’t swim backwards. If you pull a shark backward by the tail, it will die because water will get inside its gills. 4. Sharks can go through more than 30,000 teeth in a lifetime. Newer teeth are always larger, so sharks can look scarier as they age. 5. A shark’s jaw is not attached to its cranium. Because its mouth is situated on the underside of its head, a shark can temporarily dislocate its jaw and push it forward to take a bite. 6. Galeophobia is the excessive and persistent fear of sharks. It comes
