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.
The biggest shark to have EVER lived, is the Megalodon, a giant prehistoric shark and a legendary killer that still secretly strikes fear into the hearts of anything and everything that dares to venture out into the sea. Its name comes from a Greek word meaning âBig Toothâ.