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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Relative sizes of the sporophyte and gametophyte generations of bryophytes, ferns, and seed plants. Relative sizes of the sporophyte and gametophyte generations of bryophytes, ferns, and seed plants.
Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th
This mural depicts the history of Mexico and its struggles to create a just society in the face of ... This mural depicts the history of Mexico and its struggles to create a just society in the face of ...
The most commonly used socket drive sizes include 1/4, 3/8, and 1/2 inch drives. The most commonly used socket drive sizes include 1/4, 3/8, and 1/2 inch drives.
Protective gloves are available in several sizes and materials. Protective gloves are available in several sizes and materials.
An agglutination inhibition reaction. Commercial kit materials would create an agglutination ... An agglutination inhibition reaction. Commercial kit materials would create an agglutination ...
Video: Body plan of euglena Animation

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