... a few years longer. A sunguard is a cream designed to protect one's skin from being sunburned. Our bodies are incrementally damaged by each new exposure to the sun, and this damage can later be seen in the form of wrinkles, blotchy skin and even skin cancer. Sunscreens have evolved a goodly amount over the years. Christopher Columbus noticed in 1492 that the natives of Hispaniola would protect themselves with red paint, as to avoid sun damage. The ancient Greeks, who trained for the Olympics in the nude would rub themselves with a mixture of sand and oil, which provided an opaque protection from the sun, and were sweat resistant. These notions resemble those of ...
... dropped to 11,000. The 1989 ban on elephant ivory is the main cause attributed to the exponential rise to hippo ivory trade. "European and African activists are petitioning advocacy groups, including last week's annual Convention on International Trade in Endangered Species in Florida, for a ban on hippo poaching. But they say they're a long way from putting an end to the slaughter." (Howard & Koehl) The hippopotamus is an enormous amphibious animal with smooth, hairless skin. Hippos can be found in Liberia, the Ivory Coast, and a few can also be found in Sierra Leone and Guinea. Hippos used to be found anywhere south of the Sahara Desert where they could fi ...
... through the sides of randomly- oriented ice crystals. As the sunlight passes through each crystal, the light changes direction, or refracts. The radius of the hale depends on the amount of change in the direction of the sun's light. Usually this is 22 degrees. Since the sun is 1/2 of a degree across, the radius of the halo is 44 sun-widths. Occasionally you may see a second halo at 46 degrees from the sun (that is, with a radius of 92 sun-widths). This is produced by sunlight passing through both the side and bottom of each crystal. Moonlight will also produce a halo, around the moon, with the proper layer of cirrostatus. Another common optical effect is ...
... tongues are two feet long, and the animals can move them in and out of their mouths up to 150 times per minute (Schupska 1). The giant anteaters lives on the ground. It walks with its front feet turned on the sides to protect its claws, which the animal uses to rip open ant nest before eating. Then it flits its long tongue and literally licks up the ants. The anteater precedes to rip oben a termite or ant hill with its clawed hand and work its tubular snout down into the heart of the colony, trapping the insects on its tongue's sticky coating (Encarta ‘98). The anteater also uses the claws as a defense mechinism. The natural predators of the giant anteater ar ...
... for to take place. The chromatis is coiled up and consists of loose threads. In prophase, the next longest stage, the chromatin becomes chromatids which later form chromosomes. They are attached to the centrioles by spindle fibers. The chromosomes are lined up in the center of the celll. The nucleolus and nuclear membrane disappear. In the next phase, metaphase, the chromosomes line up along the metaphase plate. The plate is the midpoint of the cell between the two centrioles which are located at opposite poles. During anaphase, the centrioles start playing tug of war with the chromosomes. The chromosomes split into identical daughter clells. The kinetochores are ...
... Roswell Incident The Roswell Incident, which enlightened our minds to the capacity of excepting all, has remained one of the most controversial issues today. In Roswell, New Mexico, 1947, a strange occurrence arises. An alien craft from outer space crashed in an open field. The issue lay still for almost thirty years, until the thought of a government cover-up arose. Society's opinions have changed over the years. Previous to the 1990's, people have despised the thought of sharing the universe with other intelligent life forms. Now people are interested in this mysterious phenomenon. People think it is the blame of the movies and television. By ...
... of industrialized society. This " ozone shield is dissipating " and the cause is laid primarily to man - made chemicals ( Bowermaster et al, 1990, p.27 ). If enough of these man - made chemicals are released, "the ozone layer would be weakened to such an extent that it does not filter out the sun's invisible and dangerous ultraviolet rays " ( Jones, 1992, p.36 ). Such a scenario would drastically alter society and the environment. Ozone depletion has been described as "potential catastrophe " and " a planetary time - bomb " ( Way, 1988, p.9 ). The four main areas affected by a depleted ozone layer and thus by the corresponding increase in harmful ultraviolet r ...
... first discovery. Its name came from Pluto, the planet after Neptune for which Neptunium was named. In 1940, at the University of California at Berkeley, he bombarded a sample of Uranium with deuterons, the nuclei in atoms of deuterium, transmuting it into plutonium. Shortly after, Seaborg was able to isolate plutonium 239, an isotope used in atomic bombs. Plutonium is a highly dangerous and poisonous element because it rapidly gives off radiation in the form of alpha particles. Alpha particles, which are identical to the nucleus of a helium atom, consist of two protons and two neutrons tightly bound together. Although the particles can only travel about five ce ...
... with an average age of onset of sixteen years for females and twenty-two years for males. Type II affects people over sixty years of age. There are several immunological abnormalities associated with psoriasis. Early psoriatic changes occur in advancing lesions before the accumulation of inflammatory cells. These changes are mediated by activated CD4+ T lymphocytes and can be detected before visible pathology to the skin occurs. Activated T lymphocytes exhibiting an increase in HLA-DR and IL-2R can be seen in close proximity to Langerhans cells in the dermis before lesion formation. Since Langerhans cells are antigen presenting cells, activation ...
... in pain and eventually die. In these two nations, a reported total of five hundred fifty cases of those who have been infected with Ebola, three hundred forty people did not make it. For a few years, there were no reported cases of the Ebola virus. Without warning, the Ebola appears and sweeps through Sudan, once more. This time there were only thirty four cases, but took the lives of twenty two patients. All of the victims of Ebola probably ask the same questions, “ God, what did I do to deserve this? ” The doctors still did not find the cause of the Ebola virus. I wonder how are the doctors suppose to explain to the patient’s condition. It ...
