Sharp teeth and keen senses - dive into the underwater world and discover all about sharks.Did you know that sharks are among the oldest creatures on Earth? They swam through the primordial oceans long before dinosaurs existed. Many legends surround these animals with their fearsome, sharp teeth. But how dangerous are sharks really?In The World of Sharks, you will not only discover how sharks have survived while many other animals have gone extinct and how many different species exist today, but also learn about their unique teeth, their peculiar lateral line organ, and their excellent sense of smell.However, many sharks remain largely unresearched to this day -- their habitats are too deep in the sea for humans to reach. This book is just the starting point for exploring so much more about sharks.