Sharks can sense the presence of blood up to 5 kilometers away. They can detect one part of blood in 100 million parts of water.
Sharks are so strong that their bite can produce a pressure of up to 6 tons per square centimeter.
Sharks can live without food for at least two months.
Sharks, over 400 million years on earth, have shown an extraordinary ability to resist cancer and other diseases. In this regard, researchers continue to study the immune system of sharks in search of a universal cure.
Sharks can live up to 100 years.
The largest shark is the whale shark, it can reach up to 15 meters in length. She has approximately 300 rows of teeth with hundreds of tiny teeth in each row. This is a kind of filter to weed out plankton.
Sharks have no bones - a shark's skeleton is made up of cartilage.
The largest predator shark is the Great White Shark, which reaches seven meters in length. The smallest Dwarf Shark grows up to 15 centimeters.
The ostrich is often credited with laying the largest eggs, but the largest egg in the world was actually laid by a whale shark. The egg, 14 inches (36 cm) long, was found in the Gulf of Mexico in 1953.