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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
There are 20 feet of blood vessels in each square inch of human skin.
The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.