.... science of Paleontology, or the study of life in the past through fossil remains or impressions, usually in rock. Changes occur in living organisms that serve to increase their adaptability, for survival and reproduction, in changing environments. Evolution apparently has no built-in direction purpose. A given kind of organism may evolve only when it occurs in a variety of forms differing in hereditary traits, that are passed from parent to offspring. By chance, some varieties prove to be ill adapted to their current environment and thus disappear, whereas others prove to be adaptive, and their numbers increase. The elimination of the unfit, or the "survival .....

.... disinfectants, monomers (plastics), solvents, and pesticides. It is also used for bleaching paper pulp and other organic materials, preparing bromine, (a poisonous element that at room temperature is a dark, reddish-brown), tetraethyl lead, and killing germs in water, particularly in swimming pools and hot tubs. Like every member of the halogen group, chlorine has a tendency to gain one electron and become a chloride ion. Chlorine strongly reacts with metals to form mostly water-soluble chlorides. Chlorine also strongly reacts with nonmetals such as sulfur, phosphorus, and other halogens. If you were to mix hydrogen and chlorine gases and keep them in a .....

.... The best treatment for the disease is prevention, which is mostly limited to vaccinations. With vaccinations there are two types of immunization, which are Active and Passive immunization. The difference between the two is that Active immunization is used to control a disease on a long term basis, where Passive immunization is used to treat a disease quickly but only lasts a few weeks. Passive immunization works immediately but does not last where Active immunization takes about two weeks to work and lasts many years. There are many vaccines to prevent Encephalitis and some of the most common diseases in this topic are Measles, Mumps and Rubella .....

.... that allowed the harness to be placed around the horses chest. This new invention prevented horses from being strangled, which allowed for faster plowing and greater food production. Around the same time as the chest harness’ invention, medieval villagers were organizing their land into a two field system of agriculture. This system utilized one large field divided in half, one half of a field with crops and left the other half of a field was left unplanted for a year so as not to exhaust the soil. This system led to problems, because dividing the land in half led to shortages in the production of food because only half of the field was being used. This syste .....

.... cancer occurs in the glottis area, or vocal cord section. When a tumor develops in this area it is usually painless, but almost always results in hoarseness and a change in the person’s voice. If the tumor occurs in the supraglottis, or the section above the vocal cords, it may cause a lump in the throat, sore throat, or earaches. When the tumor develops in the area where the larynx and trachea join, subglottis, the person experiences trouble in breathing, very noisy breathing. Constant coughing or a feeling of a lump that doesn’t go away are also signs of larynx cancer. Tumor development in the subglottis is very unusual and rare. As a tumor .....

.... reproduction found in all animals, human beings included, is the formation of identical twins, triplets, and so on. Identical siblings constitute a clone. The growth of a tumor in the body of an individual is, in effect, the formation of a clone of malignant cells. Humans have learned from nature and started their cloning saga also. In one method of artificial cloning used in plant breeding, cells are cut from a plant and placed in a flask with a nutrient medium. The cells grow and divide, forming embryonic tissues that are transferred to soil, where they produce complete plants. Grafting is another method of cloning used in Horticulture. Matching cuts are m .....

.... was too late. The jaws of the shark closed around the seal with an astounding 14,000 pounds of pressure, cutting the seal in half. The Great White shark claims another victim.1" Any one who’s seen the famous movie series "Jaws" may look at the Great White Shark in a similar manner. Perhaps it’s the way that Hollywood uses a mix of fact and fiction in the series. This may have frightened many people into hating the Great White for it’s ferocity. It might have also been the size of the shark in the movie that’s kept thousands of people off the beaches and out of the water. Better yet, it could have been the overall storyline: A Great White shark with .....

.... temperature. It displays the results of the burning of fossil fuels and the release of nitrous oxides into the atmosphere. Production of coal, oil, natural gas and nuclear power each expanded by 1 percent in 1995 (Brown, 16). Globally, the ten warmest years out of the last 130 have all occurred in the eighties and nineties (Brown, 15). These figures demonstrate that humanity is not effectively controlling and limiting its use of fossil fuels. As a result, acid rain falls upon the earth destroying what is left of the planet's forests and, an estimated 37 percent of the fish species that inhabit thelakes and streams of North America are either in jeopardy o .....