.... rocks. Some examples of this are Sandstone and in some weathered volcanic rock. come in many different shapes and the most common of the shapes is spherical or disk shaped. are the most varied-shaped rocks of the sedimentary world. The way come to be is the mineral matter concentrates around the nucleus of a host rock. The nucleus is often organic such as a tooth or leaf or shell or fossil. As the mineral matter concentrates around the nucleus it forms harder zones known as nodules. are very odd in the sense that they very in size, shape, color and hardness. Often are mistaken for bones, fossils, meteorites and other odd objects. They can be so sm .....

.... the DNA from a six-year-old ewe and fused it with the egg of another ewe after removing the second ewe's own DNA. After fusing, the cell began to divide as would a regular embryo. The embryo was then implanted in a third ewe who only a few months later gave birth to Dolly 1 . Upon news of this, many people began to question the possibility of not only creating genetically identical sheep, but humans as well. There has been much controversy on whether or not the cloning of humans as well as animals is ethical or even moral. Also there has been much discussion as to whether or not the benefits of cloning outweigh the dangers. WHAT ARE THE BENEFITS IN C .....

.... is high enough so that terrestrial animals do not have any problems obtaining sufficient oxygen amounts for cellular respiration. Aquatic animals, however, obtain oxygen from a different aquatic respiratory medium---water. The dissolved oxygen concentrations in an aquatic environment is much lower than the 21% oxygen concentration available in the atmosphere (Barstow et al. 1999), hence special problems pertaining to the acquisition of sufficient amounts of oxygen arise for aquatic organisms---namely fish. Fishes have had to develop adaptations that enabled them to adapt to this problem. Since water contains an insufficient concentration of oxygen, fishes .....

.... will allow the truth to emerge. It was July 1947, the day started out just like any other day. People of Roswell were going off to work, going downtown shopping, and the little ones were at playgrounds with their mothers. Day in and day out townspeople would drive by the military without giving it much thought. However, this day, in Roswell, New Mexico would change the course of history, and how the public thinks of themselves, God and the outer limits of space! Roswell New Mexico was in the middle of the desert. Here was a vast open land where one could see miles around. On this afternoon something very strange was about to happen. In the clear s .....

.... can help bring a greater awareness and understanding of enuresis. Nocturnal enuresis is a common problem. It is estimated that there are five to seven million children in the United States who have NE. Many children have no lasting problems from bed-wetting, however, some children who wet the bed can develop psychological problems, including low self-esteem. This disorder also affects family members through anger and frustration because of the condition. One important reminder to parents with children who suffer from this condition is that bed-wetting should not be thought of as a behavioral problem. There is no medi .....

.... previously, only become hazards when there is intervention with humans and their lifestyle. With the discovery of the ozone hole in the 1980's attention was now more focused on the threat humans were posing to the environment. With scientific evidence to back up pessimistic predictions of our future, most people, through media coverage, political pressures and general concern now see the environment as being truly threatened by human progress and in desperate need of help. Natural hazards have been defined as “...extreme geophysical events greatly exceeding normal human expectations in terms of their magnitude or frequency and causing significant d .....

.... by injecting it into animals. was the first bacterium shown to be the cause of a disease. is a very large, gram positive sporeforming rod. The organism is cultivated on ordinary nutrient medium and grows best aerobically, but can also multiply under anaerobic conditions. The disease, Anthrax, is very deadly but it is rare. The risk of infection is 1/100,000. The disease is acquired when spores from a contaminated animal carcass inoculate an open wound. Then, the spores germinate and invade the blood stream, leading to death within 48 hours. is classified as a harmful, pathogenic bacterium. There is a vaccine for Anthrax in humans, but it produces no signif .....

.... it does, it's the first step in the birth of a hurricane. With the lid off, the warm, moist air rises higher and higher. Heat energy, released as the water vapor in the air condenses. As it condenses it drives the upper drafts to heights of 50,000 to 60,000 feet. The cumuli become towering thunderheads. From outside the storm area, air moves in over the sea surface to replace the air soaring upwards in the thunderheads. The air begins swirling around the storm center, for the same reason that the air swirls around a tornado center. As this air swirls in over the sea surface, it soaks up more and more water vapour. At the storm center, this new supply of water v .....