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Black fur covers its ears, eyes, muzzle, legs, and shoulders, while the rest of its coat is white

thick, wooly coat

large molar teeth and strong jaw muscles

basic laws of physics dictate that energy is conserved and can only be changed from one form to another or into matter.

Fuel, on the other hand, is the accumulation of matter and therefore represents a store of energy.

released in the form of heat when the fuel is burned in chemical or nuclear reactions

Every two years as the Olympic Games begin, we hear about athletes using or at least being tested for performance-enhancing drugs. Every time the Tour de France rolls around, there's talk of possible doping. Sometimes, competitors raise the question when one athlete does particularly well. Other times, tests catch athletes with drugs in their systems. The practice of using artificial substances or methods to enhance athletic performance is called doping. Doping has become such a great concern that the United States formed an Anti-Doping Agency.

Why Some Athletes Use DrugsAthletes face enormous pressure to excel in competition. They also know that winning can reap them more than a gold medal. A star athlete can earn a lot of money and a lot of fame, and athletes only have a short time to do their best work. Athletes know that training is the best path to victory, but they also get the message that some drugs and other practices can boost their efforts and give them a shortcut, even as they risk their health and their athletic careers.

As far back as ancient Greece, athletes have often been willing to take any preparation that would improve their performance. But it appears that drug use increased in the 1960s. One well-publicized incident happened at the Seoul Olympics in 1988 when sprinter Ben Johnson tested positive for anabolic steroids and was stripped of his gold medal. Athletes may also misuse drugs to relax, cope with stress or boost their own confidence. Athletes may have several reasons for using 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 Relax Reduce weight Hide use of other drugs

During the Jomon Period (13000 BC to 300 BC), the inhabitants of the Japanese islands were gatherers, fishers and hunters. Jomon is the name of the era's pottery.

During the Yayoi Period (300 BC to 300 AD), the rice culture was imported into Japan around 100 BC.

By the beginning of the Kofun Period (300 - 538), a center of power had developed in the fertile Kinai plain, and by about 400 AD the country was united as Yamato Japan with its political center in and around the province of Yamato (about today's Nara prefecture).

Remember the rhyme: "Red sky at night, sailor's delight; Red sky at morning, sailors take warning." Look for any sign of red in the sky (not a red sun); it will not be a bold orange or red the majority of the time, but that depends a little on where you live. Sailor's delight If you see a red sky during sunset (when you're looking to the west), there is a high pressure system with dry air that is stirring dust particles in the air, causing the sky to look red. Since prevailing front movements and jet streams weather usually move from west to east (see Tips), the dry air is heading towards you.

Check the grass for dew at sunrise. If the grass is dry, this indicates clouds or strong breezes, which can mean rain. If there's dew, it probably won't rain that day. However, if it rained during the night, this method will not be reliable.

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.