Carotid artery disease is caused by a buildup of plaques in arteries that deliver blood to your brain. Plaques are clumps of cholesterol, calcium, fibrous tissue and other cellular debris that gather at microscopic injury sites within the artery. This process is called atherosclerosis.
Great white sharks may not be the world's biggest sharks, since that title goes to the whale shark, but they are the planet's largest known predatory fish. Whale sharks and great whites couldn't be more different in temperament.
Whale sharks are fish, not mammals. According to an article by Jennifer Kennedy on About.com, the whale sharks are the largest fish in the world. They grow as long as 65 feet and weigh up to 75,000 pounds. Female whale sharks are generally larger than males.