.... the density. Neptune travels around the Sun in an elliptical orbit at an average distance of 4.504 billion km (2.799 billion miles). Neptune consists largely of hydrogen and helium, and it has no apparent solid surface. The first two thirds of Neptune is composed of a mixture of molten rock, water, liquid ammonia and methane. The outer third is a mixture of heated gases comprised of hydrogen, helium, water and methane. The atmospheric composition is 85% Hydrogen, 13% Helium, and 2% methane. The planet's atmosphere, particularly the outer layers, contains substantial amounts of methane gas. Absorption of red light by the atmospheric methane is responsible for Neptune ....

.... Christopher). The two share the same nucleic DNA, but differ in terms of their mitochondrial DNA, which is vitally important for the regulation of the cell. The media and the press ignored this fact, and thus claimed that Dolly and her “mother” were genetically identical, which sparked a fury of outcry all around the world. The technique of transferring a nucleus from a somatic cell into an egg cell of which the nucleus had been removed, called nuclear transplantation, is an extension of research that had been ongoing for over 40 years. Up until now, scientists thought that adult cells could not be “reprogrammed” to behave like a fertilized egg and create an em ....

.... Then he talks about a pathologically shy, absentminded, stuffy, women-hating chemist. This man did make some discoveries about inflammable gas and proved water to be an oxide. The Element of Perfection Asimov talks about astronomers in the mid 1800's, and how they made the spectroscope. Only then does he start to mention a element a french chemist belived to be new or maybe just a heavier from of nitrogen. Inert gases and there liquefaction points are then listed along when they when fisrt liquefied by a chemist. Welcome, Stranger! This talks about the rarest of stable enert gases, xenon. It also tells why that in 1962 so many expirements were done involving this gas ....

.... as children. Perhaps it is because we live in a nation filled with many peoples of different beliefs whose Gods are all so varied and different that it is difficult to fathom that they are all the same divine being. It is also plausible that we just have a desire to quench the thirst for knowledge that lies deep within ourselves. As for myself, I cannot believe in a being which created a universe and a multitude of worlds in a rather short period of time then deigns to lower itself into becoming a puppet-master and "pulling the strings" of the Earth and all of the people therein. Since this paper touches upon many scientific terms, I feel that in order for the re ....

.... Single mode or Multimode ? Fibre Properties Fibre-Optic Endoscopy Introduction The Fibre-Optic Endoscope Some Applications for Fibre-Optic Endoscopy References Fibre Optics A relatively new technology with vast potential importance, fibre optics, is the channelled transmission of light through hair-thin glass fibres. The clear advantages of fibre optics are too often obscured by concerns that may have been valid during the pioneering days of fibre, but that have since been answered by technical advances. Fibre is fragile An optical fibre has greater tensile strength than copper or steel fibres of the same diameter. It is flexible, bends easily, and resist ....

.... Uran, which in its final form became uranium, a name which today is known worldwide while klaproth's own fame has faded. Uranium is as dense as gold. Uranium, was first prepared with some difficulty, in 1841 by the french chemist Eugène Peligot, using thermal reaction of tetrachloride with potassium. Later in 1870, an important fact was established: uranium is the last and heaviest element present on earth. This was demonstrated by Dimitri Mendeleev in his famous perodical classification of the elements by chemical properties and increasing atomic mass. Experimentation with uranium lead to many discoversies such as the X-ray by Wilhelm Röntgen, on November 8, 1895. Wilhe ....

.... Boyle (1627 - 1691). The instruments used by Boyle to measure pressure were two: the manometer, which measures differences in pressure, and the barometer, which measures the total pressure of the atmosphere. A manometer is simply a bent piece of tubing, preferably glass with one end closed. When the liquid level in both arms is the same, the pressure of the sample of gas inside the closed end must equal the pressure of the external atmosphere since the downward force on the two columns of liquid is then equal. When the liquid levels are unequal, the pressures must differ. The difference in pressure can be measured in units of length of the vertical column of liqu ....

.... of these sources recount statistics of a slowing population growth, however, the most appalling facts are that the planet Earth's water resources are depleted now. How can we allow the population to grow unchecked, when we know that even now, the Earth's water supplies are taxed to the limit? The subject of over-population encompasses many areas of study. Some examples are health, food, pollution and fresh water. The underlying link between all of these areas is water. The following four articles reveal that the water supplies that we all depend on are being used at an unsustainable rate. There is not enough fresh water on this planet for current growth rates to continue. Th ....