*1906: "S-O-S" adopted as official international distress signal
The first use of radio technology was for wireless telegraphic communication in places where there were no telegraph lines. The most important function was for emergency ship-to-shore communication. In 1906, the International Radio Telegraphic Convention in Berlin agreed on "S-O-S" as a distress signal to summon assistance. Many UNC grads think the letters stand for "Save Our Ship" or "Save Our Souls", but actually, they stand for nothing. The three letters were chosen because of their simplicity in Morse Code: three dots, three dashes, and three dots.
Question on UNC Physical Science test: Tell which is more important, the sun or the moon and defend your answer in 50 words or less.
UNC Senior: The moon is more important than the sun, because it is already light in the day making the sun useless.
If you have food in the refrigerator, clothes on your back, a roof overhead and a place to sleep... you are richer than 75% of this world.
If you have money in the bank, in your wallet, and spare change in a dish someplace... you are among the top 8% of the world's wealthy.
If you woke up this morning with good health... you are more fortunate than the million who will not survive this week.
If you have never experienced the danger of battle unfolding all around you, the loneliness of imprisonment, the agony of torture, or the pangs of starvation... you are ahead of 500 million people in the world.
If you can attend a church meeting without fear of persecution, harassment, arrest, torture, or death... you are more blessed than three billion people in the world.
If your parents are still alive and still married... you are very rare, even in the United States.
If you can read this message... you are more blessed than over two billion people in the world that cannot read at all.
The actual local time, or "sun time" constantly changes as one moves either east or west. With the arrival of railroad travel, the situation raised problems for railway lines and passengers trying to synchronize schedules in different cities. The need for a system of standardized time was evident, and eventually a system proposed by Charles F. Dowd, a school principal in New York State, was adopted. Under Dowd's system, North America was divided into four time zones, fifteen degrees of longitude, and one hour of "standard time" apart. At noon on Sunday, November 18, 1883, the new system went into effect. It became the basis for the international system of time zones we're familiar with today.
The background of Dowd's innovation, and the results: http://www.sptimes.com/Travel97/10198/To_Every_Times__There.html.