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.
Regarded as one of the largest and most powerful fish to have ever lived, fossil remains of megalodon suggest that this giant shark reached a length of 18 meters (59 ft). Their large jaws could exert a bite force of up to 108,500 to 182,200 newtons (24,390 to 40,960 lb f).