Second, even without glare they selectively reduce other reflections from objects above water, including clouds and even the sky (the reflected sky gives most of its blue color to the sea). Finally, light coming from under water is slightly polarized in the vertical plane (polarized on transmission).
1 Alzheimer's is the sixth leading cause of death in the United States. 2  Those with Alzheimer's live an average of eight years after their symptoms become noticeable to others, but survival can range from four to 20 years, depending on age and other health conditions.
Legendary comedic actor Gene Wilder has died at age 83 from complications of Alzheimer's disease, his family announced today. But what exactly does it mean to die from Alzheimer's? Although Alzheimer's disease shortens people's life spans, it is usually not the direct cause of a person's death, according to the Alzheimer's Society, a charity in the United Kingdom for people with dementia. Rather, people die from complications from the illness, such as infections or blood clots. Alzheimer's is a progressive brain disease in which abnormal protein deposits build up in the brain, causing brain cells to die. The illness is best known for causing memory loss, but it also has other debilitating effects on the body, and can affect people's ability to move and eat by themselves.