.... is also noted for its ability to change its fur color gradually to blend into its surroundings. The arctic hare's fur turns completely white during the winter months. During the spring, as the snow melts, the hare grows a new coat of brown fur. Another hare that changes color is commonly called the snowshoe rabbit. The hare has strong hind legs that enable it to hop 43 miles per hour (69 km/h), as fast as a race horse. Lagomorphs must be able to hop about quickly to escape from predators. Another lagomorph, the pika, dwells among the craggy mountain slopes of Asia and North America. In late summer the little pika might be seen guarding a st .....

.... lower the karat of the gold, the more alloy is in it. An alloy is a metal mixed with another metal to make that metal stronger. This metal is used in many ways including, tooth filling because it doesn't rust away or crack, also it is used for the covering or sealing of an astronaut's helmet. Gold is also a very good conductor of electricity. As you can see, gold is an element that is not only a great gift for someone, but is very usefull if actually put to use. The main drawback to gold is that it is a very precious metal. We dont have an unlimited supply of it. This is why gold today is priced so high and really doesn't drop that much .....

.... can be grown in this unique system. There are many advantages to using a hydroponic system for growing plants. The most obvious being that it is easier to control the plant growing environment. Some others are restricted supply of suitable water, lack of suitable soil, high labor cost of traditional cultivation, high cost of sterilizing soil, and there is a greater reliability and predictability of plant production. In addition, It's easy! Depending on what is being grown, most of the time hydroponic plants require less attention than soil-grown crops. Because of this, it can relieve some people of the added responsibility that .....

.... quantities of heat in city buildings and roads, is released slowly into the city. The dissipation of heat energy is slowed and even stopped by the tall building walls that do not allow infrared radiation to escape as readily as do the relative level surfaces of the surrounding countryside. The slow release of heat tends to keep city temperatures higher than those of the unpaved faster cooling areas. On clear, still nights when the heat island is pronounced, a small thermal low- pressure area forms over the city. Sometimes a light breeze, called a country breeze which blows from the countryside into the city. If there are major industr .....

.... between 15 and 40 or over 55. Non-Hodgkin’s type cancer is much more common than Hodgkin’s disease. Non-Hodgkin’s is a group of over 29 types of . These are classified by the US National Cancer society as aggressive or fast multiplying or indolent, slow multiplying. ( Information Network) The lymphatic system protects the body from agents that could cause disease like bacteria or viruses. Within this system, that consists of organs such as the spleen and tonsils, there are organs that destroy foreign agents, those organs are called lymph nodes. The lymphatic system works as follows; the bone marrow produces blood ce .....

.... by low hemoglobin concentration" ("A Practical Guide", 1). "Cells in the body require oxygen to fully utilize fuels. The oxygen is transported from the lungs to tissues throughout the body via red blood cells. Oxygen binds to hemoglobin, a specific molecule within each red blood cell. This molecule consists of heme, which is a red pigment, and globin, which is a protein. If the amount of functioning hemoglobin is reduced, a condition known as anemia arises" ("Anemia", 1). "The anemia that may result can take many forms, including that caused by a low iron level (iron deficiency anemia), a vitamin deficiency (megaloblastic anemia), a .....

.... awareness was not considered an environmental concern until the 1950's. Around this time, increased levels of acidity were discovered in lakes in both Canada and Scandinavia. At first, this was looked at as an interesting situation, rather than a growing problem. Since that time, much research has gone into identifying the sources of acid rain and the damage that it causes. As research continued, the situation reached catastrophe proportions in the late 1970's. By this time, thousands of lakes in Canada and Scandinavia had been declared dead, devoid of life, while emissions of acid gasses continued to rise. Acid Rain Chemistry As mentioned .....

.... compacts into a mathematical point with virtually zero volume, where it is said to have infinite density. This is referred to as a singularity. When this happens, escape would require a velocity greater than the speed of light. No object can reach the speed of light. The distance from the black hole at which the escape velocity is just equal to the speed of light is called the event horizon. Anything, including light, that passes across the event horizon toward the black hole is forever trapped. Using a small black marble as an example to represent the size that the Earth would become if it collapsed and became a black hole, Todd R. Laue .....

.... has had one negative experience with some other hunter. This can make hunting a much harder sport to participate in, even for the people who are hunting for their livelihood. (Satchell 30) Over the years, hunting has reduced the animal population drastically. In the 1970's, the number of ducks making annual flights was approximately 91.5 million. In 1995, the number had been reduced to around 64 million. Within 20 years, in short, the duck population was reduced by almost one third, showing the drastic toll hunting is taking on our wildlife. If we assume that other species have been reduced in number at approximately the same rate in rece .....

.... available rockets would be unable to place a satellite into orbit. Work on rockets for missiles and upper atmosphere research was so great after World War II that by 1954 the possibility of launching a satellite was no longer in serious doubt. In October 1954 the Committee for the International Geophysical Year (IGY), announced to other countries that they were considering launching small satellite vehicles for space exploration. In April and again in July 1955 the USSR and the U.S. announced plans to launch for the IGY. The USSR launched SPUTNIK 1 on Oct. 4, 1957, and the United States launched EXPLORER 1 on Jan. 31, 1958. These two .....