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Things I Learned Today

07 31 2001
The dry cell battery consists of a metal container filled with a moist paste. A metal electrode or graphite rod is inserted into the center of the paste and the container is capped. The metal case itself it the negative terminal and the rod is the positive terminal.


Glass is not a liquid. It is a shapeless, or non-crystalline, solid. In a crystalline object, the atoms line up perfectly, but in glass, the atoms are all mixed up.

07 30 2001

Caviar is salted fish eggs, called roe, from the Turkish word havyar, meaning "bearing eggs."


If you become too hot, sweat glands in your body product water droplets on the surface of your skin. As the water evaporates, it provides a cooling effect on your body.


Stretching sends a signal to the brain, telling it to make your muscles relax. As your muscles relax, you feel less tense, which is why it feels good to stretch.

07 29 2001

The innocent daddy longlegs spider is more venomous than a black widow spider, but it can't open its jaws wide enough to bite a human.


Something old, something new, something borrowed and something blue: old referred to something from the bride's mother to provide a bond to the bride's old life and family. New signified hope for the future and symbolized the family to be formed. Borrowed was to be a gift from a happily married woman. Blue had two different reasons: Ancient Roman maidens wore blue because it denoted modesty and fidelity and Christians associated blue with the purity of Virgin Mary.

07 28 2001

Every zebra in the world has a unique pattern of stripes. There are no two alike. Zebras recognize each other by looking at the pattern of stripes. Zebras are born white and brown. There are white zebras with black stripes, black zebras with white stripes, with dark brown stripes, all white or all black. The black stripes can get up to 50degrees Fahrenheit hotter than the white ones.

07 27 2001

When an animal hibernates, it is near death. Its body temperature drops to 32degrees F, it breathes a few times a minute, and the heartbeat is almost imperceptible. Animals that hibernate include bats, hedgehogs, ground squirrels, and marmots.

Bears don't hibernate. They practice dormancy. Tropical bears, like sun bears, sloth bears and spectacled bears don't sleep through the winter. Female polar bears do only if they're pregnant, male ones never do.

07 26 2001

Polar bears have white fur and black skin. Each hair is a hollow tube designed to funnel the sun's rays to the bear's skin to keep it warm. Because the rays bounce off of the fur, the bear appears white.

07 25 2001

SOS doesn't mean "save our ship", it was chosen because the Morse equivalent, three dots-three dashes-three dots, could not be misunderstood.


December 16, 1811 was the largest earthquake in the United States. It was near New Madrid, Missouri. It was so powerful that it rang church bells in Boston, which is around 1000 miles away.

07 24 2001

The first attempt to lay transatlantic cable, in August 1857, failed. In 1858, engineers decided to begin in mid-Atlantic with two ships, the Niagara and the Agamemnon, laying the cable out in both directions towards the Irish and Newfoundland coastlines. The cable worked for nearly four weeks before it went dead. The cost of sending the first telegrams from Europe overseas was #20.

The first undersea fiber-optic cable was laid in 1988.

FLAG, or the Fiber Optic Link Around the Globe, is the longest single cable network in the world. Completed in 1997, the cable begins in Porthcurno, England, and runs through the Strait of Gibraltar to Palermo, Sicily before stretching across the Mediterranean to Alexandria and Port Said, Egypt. From here it travels overland to to the FLAG Network Operations Center in Dubai, United Arab Emirates. The cable crosses the Indian Ocean, the Bay of Bengal and the Andaman Sea, travels overland across Thailand and then up through the South China Sea to Lan Tao Island in Hong Kong. It finally terminates in Japan in two separate locations: Ninomiya and Miura. The cable is some 28,000-km or 17,500 miles long. [
source ]

07 23 2001

Peanut is not actually a nut; it's a legume.

07 22 2001

Commissioner Stern said that every year his office gets several calls and letters inquiring about an enduring mystery posed by "Catcher": What happens to the ducks when the lagoon freezes over?

The answer, the commissioner said, is that the lagoon doesn't really freeze anymore. "The ducks generally go to the middle of the lake, which is the least likely to freeze," he said. "If that freezes over they have been seen in the Hudson and East Rivers. Ducks travel much less than they used to. It's really much easier for the ducks than it was in 1951." [
New York Times Article ]

07 21 2001

If you enjoy eating sunflower seeds and can't afford an air huller, get a coffee can and fill it about half full with sunflower seeds. Punch a small hole in the can just large enough for an air hose to fit in. then shoot the air into the can and it will break most of the hulls and separate them from the seeds.

07 20 2001

In the presence of salt, water leaves animal tissues by osmosis, which dehydrates the meat so that no bacteria can grow to decompose it.

07 19 2001

The worst death toll in aviation history occurred in the Canary Islands in 1977. A Pan Am plane was on the runway in a heavy fog when a KLM plane started its takeoff without permission. The two planes collided and both burst into flames. 560 passengers and 23 crew members were all killed and there were no survivors.

07 18 2001

Twenty years ago, about 1.5 percent of the population had treatment-requiring depression. Now it's 5 percent. 10 percent of all Americans living now can expect to have a major depressive episode in their life. around 50 percent will experience some symptoms of depression. And it is said that 15 percent of depressed people with extreme illness will eventually commit suicide.

07 17 2001

About 3 percent of Americans, 19 million or so, suffer from chronic depression. More than 2 million of those are children. Manic-depressive illness afflicts about 2.3 million and is the second-leading killer of young women, the third of young men. Depression is the leading cause of disability of people over the age of five, in the United States and abroad.

07 16 2001

The most common phobia in the world is a fear of heights.

07 15 2001

Initially, the word girl referred to small children of either gender, and maid meant a grown up. Words ending in -ster, like spinster and webster, were used for women. That's no longer the case, as in gangster and roadster. Homo meant human and vir meant male. Virtue meant courage in battle and also stood for chastity in women.


The name Baroque comes from the Portuguese barroco, which means a pearl of irregular shape. In French, the adjective is still used commonly in indicating that something is lopsided. Rococo originally meant decorated with shell, rocaille, and it was often applied to screens, tabletops and furniture. Now it has the connotation of clever with a touch of silliness. The word romantic served as a synonym to harmonious and picturesque. It came from Rome and Roman. After the empire fell, the vernacular dialects called roman gave birth to French, Spanish, Italian and other romance languages. It was also applied to tales written in that dialect, which were often about love and adventure.

07 14 2001

Renaissance enthusiasm built up the artist into a figure destined to be more and more extraordinary and exempt from law. Before then, the artisan, meaning a man who worked with his hands, had a lower standing. Velasquez was on the payroll of Philip IV as an upholsterer.

07 13 2001

Michelangelo, who was a Platonist, rejected the idea of copying externals, he drew out of each natural object its perfect, transcendent model while Aristotelians saw in the ideal form the fulfillment that matter must reach in order to become reality.

07 12 2001

Christmas was forbidden by law for 22 years in seventeenth century Massachusetts. And the Truth Tabernacle in South Carolina hanged a Santa Claus in 1982 to make a point about re-enacting pagan festivals.

07 11 2001

Luther's hope of reform might have foundered like many others of the previous 200 years, had it not been for the invention of printing. It wasn't only that the printing press was around, but also that pamphlets could be produced quickly and accurately with the improved quality of paper and ink.

For Luther the place of music was "next to theology. The Devil hates music because it drives away temptation and evil thoughts." In the school for boys and girls that Luther wanted to see established he would allow no man to teach who could not sing, "nor would I let him preach, either."

Luther compounded the dozen translations of parts of the Bible and created it, making it The Book for Protestants and even Catholics.


Erasmus was the first Humanist to earn his living by writing. He was also a monk.

07 10 2001

Famous painter Caravaggio's real name is Michelangelo Merisi and he's presumed to have died on July 18, 1610 even though his body was never found.

07 09 2001

Just as the ratios carve musical harmony out of cacophonous noise, so the Pythagoreans regarded many other sorts of desirable things as being in effect instances of harmony or attunement. A healthy body, a virtuous soul and a just society were all thought of as essentially matters of having the right ratio or mixture of elements. In each case, the harmonious ratio or mixture counter as an instance of the establishment of order or limit. The twin notions of limit and unlimited come to have a bearing on numbers via the arithmetical concepts of even and odd. The unlimited somehow corresponds to (or possibly gives rise to) the even, and the limited stands in the same relation to the odd. Odd and even combine to form the number one and all other numbers are generated from one.


Parmenides said that one cannot meaningful think of say anything about "what is not". in his view, this would amount to speaking of nothing, and a man who speaks or thinks of nothing does not succeed in speaking or thinking intelligibly at all. So, he believed that we must eliminate 'what is not' and 'nothing' from our thoughts.

07 08 2001

The static theory of motion says that if an object is in one and the same place for all of the times in a period, it's at rest. If it is in different places, it has moved.


Empedocles was the last of the philosophers to write in verse. His theories foreshadowed Darwin's theories on natural selection.

07 07 2001

Socrates was given the death penalty for disobeying the gods and promoting a different set of gods.


Above its gates, Plato's Academy was said to have the words: 'No one ignorant of geometry admitted here'.

07 06 2001

Aristotle's father was a doctor and had his father not died young, Aristotle would have probably ended up being one, too. He made huge strides in the study of zoology and invented logic. Aristotle assumed that all interesting forms of deduction could be expressed as arguments arranged into trios of statements consisting of two premises and one conclusion, in which each statements is one of four types: All A are B, No A are B, Some A are B, Some A are not B. Arguments of this sort became known as syllogisms.

07 04 2001

Thales claims the title of first philosopher. The theories mostly reliably attributed to him are that magnets are alive and that the world is made of water.

07 03 2001

In Hebrew the word for sin is chayt which means missing the mark.



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