.... considered a potential security risk, the report on these sightings was originally classified as secret. (Craig, 917) When the report was later declassified it showed that 90 percent of all UFO sightings could be easily explained. Most of the sightings turned out to be celestial objects, such as stars or bright planets like Venus, or atmospheric events such as auroras or meteors falling through the atmosphere. Many other sightings turned out to be objects such as weather balloons, satellites, aircraft lights, or formations of birds. Often these sightings were accompanied .....

.... in the description of each crystal system. Isometric This system comprises crystals with three axes, all perpendicular to one another and all have equal length. Tetragonal This system comprises crystals with three axes, all perpendicular to one another; but only two are equal in length. Orthorhombic This system comprises crystals with three mutually perpendicular axes, all of different lengths. Monoclinic This system comprises crystals with three axes, all unequal in length, two o which are not perpendicular to another, but both of which are perpendicular t .....

.... for consumers as there are no shop hours and orders can be placed any time of the day. also allows companies to have much larger markets, once you are on the Internet you are everywhere. A customer in Japan can buy exactly what a customer in the UK buys from the same electronic store. The capability to purchase products at ease from all over the world would eventually result in the weakening of international boundaries and increased trade between countries. For example when the machinery for one of General Electric's light-bulb factories broke down, GE would invite bids from f .....

.... way of storing radioactive wastes is by a process called 'vitrification'. Vitrification is a semi-continuous process that enables the following operations to be carried out with the same equipment: evaporation of the waste solution mixed with the ------------------------------------------------------------ 1) borosilicate: any of several salts derived from both boric acid and silicic acid and found in certain minerals such as tourmaline. additives necesary for the production of borosilicate glass, calcination and elaboration of the glass. These operations are carri .....

.... architectural structures stronger (Sci. & Inv. Enc., 1354). 49 is mainly made out of coal, corn, air, and water; making it rot and rust resistant. Compared to steel and concrete, 49's psi (pressure per square inch) is 525,000, steel's is 36,000, and concrete's is 3,000 (New Necessities). The blast suppression, or body armor, is strong enough to endure machine gun fire (up to .3 caliber), land mines, terroristic weapons, and a chainsaw (New Necessities). It does not melt, can stand temperatures up to 7,000 degrees Fahrenheit, absorbing vibration and energy, and will not str .....

.... When exposed to moist air, iron becomes corroded, forming a reddish - brown, flaky, hydrated ferric oxide, commonly known as rust. (Encarta, 1996) Iron is formed in shallow seas. It comes out of the water and collects on the sea floor. This creates an underwater deposit. This process occurs over billions of years. Through plate movement the whole sea floor is eventually moved up out of the water. Once out of the water, the iron has formed a land deposit. The biggest iron deposit in the United States is in the Great Lakes. Northern Minnesota is often called the Iron .....

.... cracks and crevices. A female normally lays less than 100 eggs during her life span . Under ideal conditions, the eggs hatch in two weeks, but may take up to two months to hatch. The young nymphs are very much like the adults except for size. Several years are required before they are sexually mature, and they must mate after each molt if viable eggs are to be produced. Populations do not build up rapidly because of their slow development rate and the small number of eggs laid. ECONOMIC IMPORTANCE: Silverfish sometimes feed on book binding and the paste that holds on wa .....

.... from the gland is drained into the nose through the tear duct at the inner corner of the eye. Heavy laughter or crying causes muscles in the upper eyelid to squeeze the lachrymal gland. This produces tears that flow too fast to be drained away. The eyelashes catch many flying particles that otherwise would enter the eye. As further protection, the eyelids automatically close when an object suddenly moves close to the eye. The eye is made of 3 coats, or tunics. The outermost coat consists of the cornea and the sclera. The middle coat contains the main blood supply to the .....