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Author Question: John does not like to go to school. Although he is a relatively good student, he does not enjoy his ... (Read 12 times) |
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
There are more nerve cells in one human brain than there are stars in the Milky Way.