History

Intermittent Windshield Wipers

Intermittent Windshield Wipers

Robert W. Kearns, the inventor of intermittent windshield wipers, who won multimillion-dollar judgments against Ford Motor and Chrysler for using his idea, died at his home in suburban Baltimore. He was 77. The cause was cancer. Mr. Kearns, a onetime…

Camouflage Strategy

Camouflage Strategy

One of Germany’s most feared and effective weapons during World War I was its fleet of submarines—known as U-boats—that roamed the Atlantic, sneaking up underwater on British merchant ships and destroying them with torpedoes. During the course of the war,…

World War I casualties

World War I casualties

The total number of military and civilian casualties in World War I were about 40 million: estimates range from 18 to 22 million deaths and about 23 million wounded military personnel, ranking it among the deadliest conflicts in human history.…

Hawaii

Hawaii

On June 14, 1900, Hawaii became a U.S. territory and began using U.S. stamps for its mail. American missionaries arrived in Hawaii in 1820. As the white population grew, it became apparent that postal provisions were a necessity. The first…

Wher does cancer come from?

Wher does cancer come from?

The origin of the word cancer is credited to the Greek physician Hippocrates (460-370 BC), who is considered the “Father of Medicine.” Hippocrates used the terms carcinos and carcinoma to describe non-ulcer forming and ulcer-forming tumors. In Greek, these words…

Death Ray

Death Ray

In the early 1930s, Great Britain found itself in a rather precarious position. Military theorists were predicting, quite correctly, that the next war would be dominated by air power, and the ominous threat of aerial bombardment. With Nazi Germany on…

Invasion of Czechoslovakia

Invasion of Czechoslovakia

The German occupation of Czechoslovakia (1938–1945) began with the German annexation of Sudetenland as outlined by the Munich Agreement. Adolf Hitler justified the invasion by the purported suffering of the ethnic Germans living in these regions. The Sudetenland annexation by…

Approximations of Pi (π)

Approximations of Pi (π)

Approximations for the mathematical constant pi (π) in the history of mathematics reached an accuracy within 0.04% of the true value before the beginning of the Common Era (Archimedes). In Chinese mathematics, this was improved to approximations correct to what…

Taj Mahal

Taj Mahal

India’s official recorded history says that Mughal (or Mogul) ruler Shah Jahan built the Taj Mahal in memory of his queen, Mumtaj Mahal. The Mughals, who originally came from Central Asia, ruled most of what is now India and Pakistan…

Woodrow Wilson

Woodrow Wilson

Thomas Woodrow Wilson was an American statesman, lawyer, and academic who served as the 28th president of the United States from 1913 to 1921. A member of the Democratic Party, Wilson served as the president of Princeton University and as…