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Author Question: You are walking to school one day when you notice an alien spaceship that has crashed in a nearby ... (Read 22 times) |
According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.