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.
Size. The whale shark is the largest fish in the world and the largest fish known to have lived on this planet. Because of its size and cartilaginous skeleton, it does not fossilize well and in life it is very difficult to weigh accurately. The largest accurately measured whale shark was 61.7 feet (18.8 m).