The average office desk has 400 times more bacteria on it than a toilet.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Various members of the Sciuridae family
The spectrum generated (b) is a family of peaks, with each successive peak
stages of the family cycle
The Mulleta family of Ethiopia, described in the opening vignette.
Eating Breakfast Means More Energy and Fewer Calories throughout the Day