A Dazzling Design
Sharks are powerful swimmers, and they are designed for speed. Their strong tails drive them forward, and the pectoral fins on each side of their body create lift, just like airplane wings and sailboat sails. The design of submarines is based on shark design. Sharks move like airplanes. They create forward movement with their and water moves over their fins like wings.
Sharks often travel hundreds of miles in a day. Blue sharks are known to migrate from New York to Brazil, more than 3,700 miles, to relocate to lower temperature waters.
Sharks do not run out of teeth. A shark can grow and use as many as 20,000 teeth in its lifetime. Sharks are also incapable of getting cavities, because the outer layer of their teeth consists of fluoride.