.... from another planet is on display in a museum for us to visit, the answer, "our earth is the only planet with human beings," still seems to be legitimate and convincing. But that is a very narrow-minded way to look at things. The idea that life can flourish only under terrestrial conditions has been made obsolete by research. It is a mistake to believe that life cannot exist without water and oxygen. Even on our own earth there are forms of life that need no oxygen. They are called anaerobic bacteria. A given amount of oxygen acts like poison on them. Why should there not be higher .....

.... - animal and human - is tied intimately to natural selection. Natural selection brought on the evolution of males and females during prehistoric epochs when environmental change was making life difficult for single-sex species such as bacteria and algae. Generally, these reproduced by splitting into identical copies of themselves. New generations were thus no better than old ones at surviving in an altered world. With the emergence of the sexes, however, youngsters acquired the qualities of two parents. This meant that they were different from both - different and perhaps better at cop .....

.... external world. Many dreams collected in laboratories are rather common, but some people tend to experience some bizarre dreams. Early in the 20th century, Sigmund Freud believed that dream content was composed of the mental processes different from that used in the awake state. He believed this was what dominated the dreaming mind. He described this "process" as characterized by more primitive mechanisms, by rapid shifts in energy and emotion, and by a great deal of sexual and aggressive content derived from childhood. (Hartmann, E. 1997) There are 4 stages of sleep. The individual .....

.... start drinking for your health, talk to your doctor. For some people, the risks of alcohol outweigh the benefits. And remember that while one drink a day can be helpful, more can be harmful. Could a drink a day keep the doctor away? One study says alcohol can have beneficial effects. Doctors recently determined that people who drank moderately, about one or two drinks per day, had a lower chance of developing blocked arteries in their legs. This condition results when the arteries in the legs become hardened. Researchers aren't sure exactly why alcohol works this way. It could be because .....

.... Still, the 19th century health care systems in Europe isolated people with epilepsy and forced them to live in colonies away from society. Until as late as the 1950¡¦s, people rarely talked about their epilepsy and therefore hid the disorder from the public. While there are some recognized causes to epilepsy the vast majority of cases have no known cause. In cases where the cause is known it is called Symptomatic Epilepsy. Fewer than thirty-five percent of cases have known causes. The most common out of these are „h trauma or a high fever at birth „h excessively rough handling .....

.... or memory aids. For example, if you spot three bright stars in a row in the winter evening, you might realise, "Oh! That's part of Orion!" Suddenly, the rest of the constellation falls into place and you can declare: "There's Betelgeuse in Orion's left shoulder and Rigel is his foot." And once you recognise Orion, you can remember that Orion's Hunting Dogs are always nearby. Where did the come from? OK, so we know the are helpful for remembering the stars, but why would people want to do that (besides an astronomer)? After all, I said at the beginning that farmers invented the . Why did .....

.... that people report are very similar to that of Prozac (anti-depressant drug) and fenfluramine. MDMA is usually taken orally in the form of pills synthesized by independent labs. They come in different colors, shapes, and sizes. The designer drug may also be taken in the form of a powder and injected into the blood stream for a quicker " high". The actual potency of the pills is determined by the size. They range from 50mg to 300mg depending on where it is made. Usually ecstasy is combined with smack, cocaine, heroin, or LSD as a way of coping with some of its undesirable effects. .....

.... same time mediate between Japan and ourselves. Please call the President's attention to the fact that the ruthless employment of our submarines now follows the prospect of compelling England in a few months to make peace" - ZIMMERMANN Considering this telegram was sent to Mexico, it shows Mexican importance in this war. Mexico had two thousand miles of undefended coastline on the Pacific . Her northern boarder with the United States stretched for twelve hundred miles from Texas to California, touching all along all along its length against territory that had once been her own. Mexicans remem .....

.... P. Lee described two forms of sickle cell disease: and sickle cell trait. During 1945, Dr. Linus Pauling discovered that an abnormal form of hemoglobin was the reason for the sickness in sickle cell patients. These two took a train together and started talking about . Castle told Pauling about how the cells in sickle cell patients sickled when their oxygen level is low. Paling was amazed by this conversation and did further research on the disease. After that Pauling was able to tell which patient had sickle cell trait and which one had the disease. In 1956, Dr. Vernon Ingram made a .....

.... and respiration. Then there is the endoplasmic reticulum which separates parts of the cell. Then there is the Golgi apparatus which is used for sorting, storing, and secretion for the cell. Next are lysosomes, which hydrolyze macromolecules. Then there are centrioles that play a major role in cell division. And lastly there are vacuoles which have a variety of storage functions. The plant cell is similar in most ways. The only really big differences between the plant cell and the animal cell are as follows. The first is the outer membrane. The plant cell has a cell wall that highly acts .....