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Search results 2081 - 2090 of 4688 matching essays
- 2081: Chimpanzee
- ... been studied in the Mahale Mountains National Park for 25 years. The study group, M-group, consisting of about 90 chimpanzees, has been monitored for 15 years. "Cases reported from Mahale, Tanzania, are of special interest because adult males kill and eat those infants that not only belong to the same community but are likely to be their own offspring."(Turner 1992:151) On October 3, 1989, a case of within ...
- 2082: Cfcs Cause Deterioration of the Ozone Layer
- ... UV rays cause other eye injures including photokeratitis, also known as sun blindness or snow blindness, damage to the retina, and intraocular melanoma tumors. Roach's predictions suggest a substantial future increase in eye cancer rates. However, some, object to the effects Cfcs have on the ozone and on humans. Two of the more common objections are: Cfcs are two heavy to reach the stratosphere and we should not be concerned ...
- 2083: Bats
- ... including bacteria useful in detoxifying wastes, improving detergents, and producing gasohol and antibiotics. 11. More than 50% of American bat species are in severe decline or already listed as endangered. Losses are occurring at alarming rates worldwide. 12. All mammals can contract rabies; however, even the less than half of one percent of bats that do, normally bite only in self- defense and pose little threat to people who do not ...
- 2084: The EPA: Can It, Will It Save Our Environment?
- ... and the restriction of cigarette ads from television have helped people in general. The recycling effort, the disposal of toxic wastes, and the passage of laws to protect our environment have been beneficial, however, special interest groups and lobbyists have made their job difficult. Because of the controversy and termoil in and out of the agency, would certainly indicate that the EPA is not capable of solving our environmental problems.
- 2085: Dinosaurs
- ... been assumed to have been reptilian in their physiology, cold-blooded, and ectothermic. In recent years several different lines of evidence have been interpreted as indicating that dinosaurs may have had warm blood and high rates of metabolism, comparable to birds and mammals. Evidence supporting this view includes upright posture and carriage; mammallike microscopical structure of bones; skeletal features suggestive of high activity; and specialized food-processing dentitions and low ratios ...
- 2086: The Lowell Observatory
- ... used this telescope to study Mars; this telescope was also used in the 1920's by V.M. Slipher to discover evidence of receding galaxies. The Lowell Observatory was mainly founded because of Dr. Percivals' interest in discovering life on mars. Lowell observatory was the first observatory in Arizona. It is a great family attraction with its location being in the popular Tourist City of Flagstaff; the observatory looks over the ...
- 2087: Xenon
- ... crust. Only 3x10-9% of the earth contains xenon. The element is mostly found in the air, and is only collected through special air separation plants. In "Science News Magazine," I found an article of interest to me concerning xenon. It stated that scientists have discovered a way to use xenon to make M.R.I.s of lungs come out clearer. After exciting rubidium atoms and adding it to xenon ...
- 2088: Alkanes
- ... anesthesia or dry cleaning fluid. The Pentanes and Hexanes are also highly flammable and make really cool explosions. Heptane, octane and nonane make up gasoline. The "Octane Scale" on gas pumps uses a system which rates n-heptane at a 0 and isooctane at 100. Currently propane gas is being studied to use it as a fuel for more efficient cars. Here is the reaction when propane is oxidized. C3H8 + 2O2 ...
- 2089: Ozone
- ... money lost on crops, and forests, have made ozone quite a prevalent issue, mainly because it affects everyone, all over the planet. This invisible gas has and will continue to be a source of intense interest for scientists in the coming years. Contributing pollutants such as automobiles, power plants, and other things I mentioned previously have led to controversy over these items. Huge amounts of money have been put into research ...
- 2090: Nuclear Power: Cons
- Nuclear Power: Cons Since the days of Franklin and his kite flying experiments, electricity has been a topic of interest for many people and nations. Nuclear power has been a great advance in the field of electrical production in the last fifty years, with it's clean, efficient and cheap production, it has gained a ...
Search results 2081 - 2090 of 4688 matching essays
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