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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.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Vaccines prevent between 2.5 and 4 million deaths every year.
Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.