.... as with most solids, it will deform if long-term stress is applied. Presently, there are more than fourteen plates in the Earth’s crust. Upwelling hot magma flows out from mid-ocean ridges and then cools down when exposed to the cooled environment outside; the layer of cooled magma forms the lithosphere. When magma flows out from the ridges, the crust is fractured and a new ocean floor is built spreading perpendicularly away from the ridge. Because of this constant upwelling, the ocean is relatively shallow in these areas. Sea floor spreading and continental drift are the products of this continual upwelling as you can see in the .....

.... the process of bioaccumulation can result in top-level predators such as humans to have contaminants at levels many million times greater than the environmental background levels (Guilette 1994). In field studies, toxicity caused by endocrine disruption has been associated with the presence of certain pollutants. Findings from such studies include: reproductive disruption in starfish due to PCBs, bird eggshell thinning due to DDT, reproductive failure in mink, small penises in alligators due to DDT and dicofol (Guillette 1994, Colburn et al 1996). In addition, a variety of reproductive problems in many other species are claim .....

.... were approximately the size of a DC-4 airliner ( Jackson 4). This account was the first sighting to ever receive a great deal of media attention. This sighting gave birth to the phrase "flying Saucer" coined by a reporter named Bill Begrette. Although not the first UFO sighting in history, Kenneth Arnolds account is considered to be the first documented UFO sighting. The following day Mr. Arnold discovered that in addition to his sighting there were several others in the Mount Ranier area that same day (Jackson 6). When most of think of UFO sightings we picture an unemployed, half- crazed, alcoholic .....

.... of the tick season. Several of the patients interviewed reported having a skin rash just before developing their arthritis, and many also recalled being bitten by a tick at the rash site. Further investigations resulted in the discovery that tiny deer ticks infected with a spiral-shaped bacterium or spirochete (which was later named Borrelia burgdorferi) were responsible for the outbreak of arthritis in Lyme. In Europe, a skin rash similar to that of had been described in medical literature dating back to the turn of the century. may have spread from Europe to the United States in the early 1900s but only recently became com .....

.... of more pimples and scarring. Your hands carry many bacteria that will help to spread infection. This is not a good thing to do (Facts 2). When using cosmetics it is best to stay away from nonwater-based products and products that are rich in oils. These cosmetics will block the pores and trap the oils deep inside the skin, causing pimples. When washing your face be gentle. Do not wash with a dry soap or a soap high with pH. They will cause the skin to be very irritated. Dry the face with a soft towel by just gently patting. Try to wash your face at least twice a day, but do not over do it. If washing enough is not the a .....

.... body can also be considered ectopic if it sits in an abnormal position in the body. A heart beat that originates from and unusual part of the heart is an “ectopic” heart beat, and a baby that is not properly nestled in the uterine cavity is an “ectopic” pregnancy. In an ectopic pregnancy the baby can be found in various different locations. The most common is in the end of the fallopian tube. It can also settle and embed itself onto the ovary, inside the cervix, or, rarely, in the abdominal cavity. The symptoms are present in the first stages of pregnancy. Missed menstruation is the first sign of the pregnancy as pe .....

.... That is, if you can deliberately make any number of copies of an individual, is each one special? How special can clones feel, knowing they were replicated like smile buttons. "We aren't just our genes, we're a whole collection of our experiences," says Albert Jonsen. But the idea, he adds, raises a host of issues, "from the fantastic to the profound." When anesthesia was discovered in the 19th century, there was a speculation that it would rob humans of the transforming experience of suffering. When three decades ago, James Watson and Francis Crick unraveled the genetic code, popular discussion turned not to the new .....

.... of global warming is the burning of fossil fuels. Fossil fuels are coal, oil and natural gases. We use these fuels to run factories, power plants, cars, trucks, buses, air conditioning and etc. The people of the earth are putting 5.5 billion tons of carbon, in the form of carbon dioxide in the air every year! Seventy five percent of this is fossil fuels. 3. Impact Causing Global Change For many years, scientists have been predicting that our disregard for Mother Nature would make the climatic temperature of this Earth to increase greatly. There have been arguments that the whole idea of Global Warming is a hoax, that the tempe .....

.... of Puerto Peñasco. They irrigated the plants daily by flooding the fields with seawater from the Gulf of California. The best halophytes produced roughly the yield of alfalfa using freshwater irrigation. In order to show that these halophytes could replace other crops for use they tested to see if the crops could feed livestock. The halophytes have protein and carbohydrates but they contain too much salt. This limits the amount an animal can eat and dilutes the nutritional value. Therefore, the authors decided to use the halophytes as part of a mixed diet for the livestock. The animals’ meat taste was not affect .....

.... was the fourth child of Dr. Robert Darwin and grandson of Erasmus Darwin. Much of Charles' childhood was spent collecting insects, coins and reading various literature on natural history, travel and poetry. Charles Darwin was not a scholarly student during his years at Edinburgh Medical College. He disliked what was taught and found most of the lectures boring, yet he developed a natural interest in studying rocks and fossils. He convinced his father that he could not be a doctor as his father had wished, so instead Charles Darwin studied Theology at the University of Cambridge. After his studies he was given the oppo .....