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end of the spectrum are the reds and oranges. These gradually shade into yellow, green, blue, indigo and violet. The colors have different wavelengths, frequencies, and energies. Violet has the shortest wavelength in the visible spectrum. That means it has the highest frequency and energy. Red has the longest wavelength, and lowest frequency and energy. LIGHT IN THE AIR Light travels through space in a straight line as long as nothing disturbs it. As light moves through the atmosphere, it continues to go straight until it bumps into a bit of dust or a gas molecule. Then what happens to the light depends on its wave length and the size of the thing it hits. Dust particles and water droplets are much larger than the wavelength of visible light. When light hits these large particles, it gets reflected, or bounced off, in different directions. The different colors of light are all reflected by the particle in the same way. The reflected light appears white because it still contains all of the same colors. Gas molecules are smaller than the wavelength of visible light. If light bumps into them, it acts differently. When light hits a gas molecule, some of it may get absorbed. After awhile, the molecule radiates (releases, or gives off) the light in a different direction. The color that is radiated is the same color that was absorbed. The different colors of light are affected differently. All of the co

d after Lord John Rayleigh, an English physicist, who first described it in the 1870's.) WHY IS THE SKY BLUE? The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by t

As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.

Why We Celebrate the New Year A legend of China recounts how people along the Yellow River Basin lived a simple, nomadic life, very content and happy. On a cold winter evening a mysterious being attacked the village and destroyed the villager's property. A village meeting was held and precautions taken to protect them from the intruder. Noting happened and people went about their daily routines. Then the mysterious being struck again, causing even greater damage to lives and property. Again, the villagers gathered and prepared for their safety. And again, nothing happened and people went about their normal activity, feeling secure and safe. But the mysterious force struck a third time, causing much loss and great fear among the villagers. An elderly scholar had studied the intrusions, watching the stars and heavenly bodies and recording their movements. He explained that the intruder came when the heavenly bodies were in a particular order and after the sun had appeared 365 times. The villagers studied this theory closely and learned that the intruder feared three things: the color red, illumination and noise. They called the intruder Nien or year. On the following 365th day, preparations were made for the return of Nien. Houses were lit with lanterns, objects were painted bright red and loud noises were made until dawn of the next day. The villagers' plan worked and the mysterious intruder did not appear. It was decided that from then on, a thanksgiving ceremony would be held every 366th evening to thank all the god for their blessings. And that the same preparations would be made for the return of Nien, scaring away the evil deeds of the spirits. Thus we celebrate the new year, chasing away evil with fireworks and celebrating with festivity and food.

people of modest intelligence and talent often have great success in life,

talented people possessed of very high IQ frequently do not.

The stakes in Athens are fierce. The difference between an Olympic gold or silver medal could be a one hundredth of a second on the track or in the pool; an inch on the pole vault or shot put.

The athletes who make the Olympic cut are blessed with the right combination of physical and psychological traits, including an intense competitive drive and an unrelenting determination to be the best. This is the stuff of champions.

Steroids are not just for elite athletes--they can be used by anyone who wants to change his or her body image. The Centers for Disease Control's Youth Risk Behavior Surveillance report shows more than a million youth taking steroids, and the numbers have been rising every year.

The Wrong Way to Win › Introduction to The Wrong Way to Win › Why Do Athletes Use Performance-enhancing Drugs? › Masking Pain and Managing Weight and Stress › Detecting Drugs Why Do Athletes Use Performance-enhancing Drugs?

An athlete may want to: Build mass and strength of muscles and/or bones Increase delivery of oxygen to exercising tissues Mask pain Stimulate the body Hide use of other drugs

Many drugs are banned outright in Olympic competitions. However, some drugs, such as cortisone and local anesthetics, are merely restricted because they have legitimate clinical uses. Athletes may also misuse drugs to reduce weight, relax, cope with stress or boost their own confidence. Whatever the reason, doping has many unsafe if not deadly side effects.

As a celebration steeped in American history, you might expect it to be a day of remembering our forebears and displaying patriotism. However, in modern times, consideration of the first Thanksgiving is generally relegated to schoolchildren. Although that first celebration was a landmark moment in the history of America, beyond giving thanks for freedom and safety, you won't typically find the flag waving of the Fourth of July or Memorial Day. Instead, the holiday remains centered on family, friends, and food. Some see the holiday as a last bastion of non-commercialization. Beyond a few centerpieces and themed party supplies, Thanksgiving doesn't receive the same marketing push as Valentine's Day, Halloween, or especially Christmas. It feels more pure in this regard. However, the time and money required to create a traditional Thanksgiving spread doesn't make the day completely free of pressure. As a national holiday, Thanksgiving means a day free from school and work for most. Even television seems to conspire to bring families closer together, with spectacles such as the Macy's Thanksgiving Day parade, big football games, and themed marathons on numerous cable channels inviting everyone to gather 'round. Although giving thanks for the many blessings of life is easily interpreted as a religious sentiment, there is no particular creed or belief system associated with the holiday. A community might host an ecumenical service in honor of the holiday. Families often say a prayer over the food before beginning dinner. Churches sponsor holiday dinners as outreach to the poor and lonely. However, all of these actions are founded on the basic, secular premise of giving thanks. From preschoolers making handprint turkeys to adults remembering the most important people and moments in their lives, it is easy to answer, "Why do we celebrate Thanksgiving?" Like the Pilgrims did on that long-ago day, we all gather to give thanks for the many bounties life offers.

mostly showing off their status.

plenty of features and gadgets

hey I have money, I have class, and I have style,

attention getter".

hey purchase a vehicle that reflects their style and character.

Hong Kong's population crisis is likely to worsen as a survey showed Thursday that nearly four in 10 women want only one child or no children at all.

world's lowest birth rates.

Twenty-six per cent of 1,500 women interviewed said they wanted only one child