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There are more sensory neurons in the tongue than in any other part of the body.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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.
Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.