When does a human fetus acquire fingerprints?

In a blind test of a new drug, the subject does not know if he or she is receiving the drug or a placebo, but the physician administering the test does know. In a double-blind test, neither the subject nor the physician knows.

The three tallest buildings in the United States in the 1980s were: Sears Tower. 1,454 feet, 110 stories (Chicago) World Trade Center. 1,350 feet, 110 stories (New York) Empire State Building. 1,250 feet, 102 stories (New York)

According to the Report of the Postmaster General, 106,311,062,000 pieces of mail traveled through the system in 1980. On a given day, therefore, approximately 291,263,000 items passed through the country’s post offices. What’s more, this prodigious amount of mail traveled through many fewer post offices than at the turn of the century. In 1900, there…

Yes folks, American women still earn less money than American men. In 1988, the median weekly earnings of full-time female workers in all occupations were 70.2 percent of male workers’ earnings.

According to 1980 census findings, citizens in the 55 64 age group had a turnout of 71.3 percent. Close behind were those in the 65-to-74 age group, with 69.3 percent. Those 18 and 19 brought up the rear with a 34.2 percent showing.

Plastics are only one kind of polymer, a substance composed of very large chain-like molecules that consist of smaller, repeating chemical units. Natural polymers include proteins, cellulose, diamonds, and quartz. Besides plastics, man-made ones include concrete, glass, and paper.