Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
Global view of Mars as seen by the Viking 1 orbiter in 1980, showing the Valles Marineris (center)
Sol Duc Falls in Olympic National Park, Washington.
Cyanobacteria from 850 million years ago (Photo 2)