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Author Question: In close comparisons, external fertilization often yields more offspring than do (Read 476 times) |
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
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There are more bacteria in your mouth than there are people in the world.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.