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Essays on Science

The Human Cloning Controversy
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... clones would be human beings like you and me . . . They would be carried and delivered after nine months by a human mother . . . Consequently, a clone twin will be [years] younger than the original person. (1) Whether or not scientists should or should not clone humans is a tough question to answer. Legally, are scientists able to make clones? The answer is no. Should scientists be able to make a headless human? (body parts) Yes, as long as no law exists banning headless humans. Before going into this controversy, some background about what has happened in cloning would be useful. Two astonishing feats have been achieved in the scientific world. One is ...



Cobalt
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... and very hard and does not tarnish. Cobalt has many uses and I will talk about some of them. It is a very expensive metal that is used in the manufacture of very many expensive alloys. Cobalt-iron alloys have very unique and special magnetic properties. For example, Hyperco is used as the nucleus in strong electromagnets. Alloys containing titanium, aluminum, cobalt and nickel can be made to become permanently magnetic. One alloy, called Stellite, is an alloy of cobalt, chromium, tungsten, and molybdenum. This alloy is extremely hard and keeps its hardness at extreme temperatures. It has many uses: cutting tools are made of it along with gas turbines. ...



Tim O'Brien's The Things They Carried Eating Them Away
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... with his daughter. Twenty years had gone by, but it seems as though all of his thoughts are geared back to the time he had spent in the jungle so long before. The two of them travel all over the country, but before their departure, he returns to the field where he feels he lost everything. On this list he includes his honor, his best friend, and all faith in himself. For O'Brien, evidence of the parasite is not solely in his return Vietnam, but rather a constant personal preoccupation that seems to flow through the collection of stories. O'Brien shows how the memories of the war take on a parasitic form, and uses himself as an example. In the chapter ³Speaking ...



Meth Labs
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... a general sense of well being, which can last 6 to 8 hours. After the initial rush, there is typically a state of high agitation that in some individuals can lead to violent behavior. Contrary to the stereotype of rural areas as idyllic, protected environments in which to raise families, substance abuse is as great a problem as it is in the cities. One must realize that rural communities vary in characteristics considerably, which complicates our understanding of rural substance use problems and increases the need for prevention, intervention, and treatment programs. For too long, the problems of alcohol and drug abuse in rural areas have received little attent ...



The Dangers Of Nuclear "Progress"
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... on Japan should have caused alarms to sound in people's heads…"Danger, danger!" Just one of these bombs has the ability to wipe out an entire country. The United States did make an attempt after World War II at eliminating nuclear proliferation by proposing the Baruch Plan in the United Nations. This proposal stated that all nuclear technology and materials be placed under international ownership and that all nuclear weapons be destroyed. However, the Soviet Union feared that the United States would always have a military advantage if they gave up their plans for building a nuclear device and, therefore, rejected the proposal. I think that the refusal ...



Phosphorus: Chemical Reactions Of Phosphorus And Its Importance
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... to one another and become heavy and settle to the bottom of a clarifier. The aluminum sulfate and phosphorus mixture can then be withdrawn, thereby removing the phosphate or phosphorus from the wastewater flow. Industrial Applications: The application of this reaction to the industrial world consists of a set of processes to filter out the phosphate. The setup is the following: Purpose: Restrict phosphates to aluminum phosphates for easier disposal of phosphorus. The first step in phosphorus removal is the Rapid Mix. In this stage, alum and waste or water runoff(known as effluent) is blended together as rapidly as possible with the use of a hig ...



Near Earth Objects
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... The Spaceguard program is sponsored and run by NASA Ames Space Science Division: Asteroid and Comet Impact Hazard. Also under the direction of Dr. Tom Gehrels the University of Arizona has the Spacewatch program. NEOs can be either asteroid or comets. Ninety percent of the information that I came across discussed asteroids. Therefore, I will concentrate on asteroids alone. I'm not fully knowledgeable on the subject but I did learn a great deal. What are NEOs? The "Webster's New World Dictionary" states, "Any of the small planets between Mars and Jupiter". The "Funk and Wagnalls Encyclopedia from Infopedia" states, "One of the many small or minor planets ...



Hard Drive Evolution
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... each buzzed away in the air conditioned isolation of corporate data centers. The personal computer revolution in the early 1980s changed all that, ushering in the introduction of the first small hard disk drives. The first 5.25-inch hard disk drives packed 5 to 10 MB of storage, the equivalent of 2,500 to 5,000 pages of double-spaced typed information, into a device the size of a small shoebox. At the time, a storage capacity of 10 MB was considered too large for a so-called "personal" computer. The first PCs used removable floppy disks as storage devices almost exclusively. The term "floppy" accurately fit the earliest 8-inch PC diskettes and the 5.25-inch disket ...



Coral Fish
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... colors of the fish. Males and females tend to advertise their sex and availability through vibrant colors. This sexual dimorphism is most evident in such reef residents as groupers. The color patters change predictably from the "juvenile: to the "initial" subdued pattern of small adults to the "terminal" pattern in the largest adult males. The terminal male is the one with the brightest colors and gaudiest patterns. The moon seems to play an important role in fish reproduction. According to Peter H. Pressley, it appears that the moon/s light may be as important as its gravitational pull. "Some fishes may use periods of maximum moonlight for effective nest gu ...



The Big Bang
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... Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is still expanding, as astronomers have observed. The Steady State model says that the universe does not evolve or change in time. There was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe is the same everywhere on the large scale, at all times. It maintains the same average density of matter forever. There are observational evidences found that can prove the ...




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