What Causes Warts?
What Causes Warts? Warts are skin infections caused by tiny germs called viruses of the human papillomavirus (HPV) family that get into your skin. The infected skin...
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What Is a Fever?
Fever is a body temperature that is higher than normal. (If your body temperature is higher than 98.6 degrees Fahrenheit when you are sick, you probably have a fever.)...
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How Does a City Purify Its Water?
How Does a City Purify Its Water? Water in its natural state is often dirty, and usually must be purified to be safe for consumption. After water is drawn from a lake...
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Why Is Milk Pasteurized?
Why Is Milk Pasteurized? Milk is an excellent medium for microbial growth, and when stored at ambient temperature bacteria and other pathogens soon proliferate. Milk is...
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Why Do You Sneeze?
Usually you sneeze to get rid of an irritation in the air passage of your nose. Various things can cause a sneeze. You may have dust up your nose, or you may have...
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