.... to inherit haemophilia from both sides of the family, which is rare.)2 The other chromosome is likely to be normal and she can therefore compensate for this defect. There are two types of haemophilia, haemophilia A and B. Haemophilia A is a hereditary disorder in which bleeding is due to deficiency of the coagulation factor VIII (VIII:C)3. In most of the cases, this coagulant protein is reduced but in a rare amount of cases, this protein is present by immunoassay but defective.4 Haemophilia A is the most common severe bleeding disorder and approximately 1 in 10,000 males is effected. The most common types of bleeding are into the joints and muscles .....

.... in a rainbow, and other interesting facts about rainbows. First of all a rainbow is a curve of colored light which is seen in the sky. Rainbows can be seen in moonlight or in artificial light. They are caused by the sun shining through tiny drops of water in the air. A rainbow's brightness depends on how large the drops are. The larger the drops are the brighter the rainbow will be. Many people think that a rainbow is only made of six colors, but it is really make of seven. The colors in order are red, orange, yellow, green, blue, indigo, and violet. A primary rainbow is a rainbow with red on the outside and violet on the inside. The largest ra .....

.... (The America Heritage Dictionary of the English Language, Third Edition, 1992). The isotopes of a given element have identical chemical properties but varying physical properties (The America Heritage Dictionary of the English Language, Third Edition, 1992). A radioisotope is a radioactive isotope (The America Heritage Dictionary of the English Language, Third Edition, 1992). A radioisotope is a naturally or artificially created isotope having an unstable nucleus that decays, letting off alpha, beta, gamma rays until stability is reached (The America Heritage Dictionary of the English Language, Third Edition, 1992). Radon's melting point is -71Â .....

.... are two highly recognized research programs that I will discuss with you. 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 .....

.... waves. It follows the same rules as a wave does--it moves in a regular fashion, in a perfect sine wave at a certain frequency. It travels in a straight line, and is subject to refraction. All of these characteristics are found in waves of any type, from radio frequency waves, up to Gamma and X- rays. Light, however, also exhibits qualities characteristic of particles such as neutrons and protons. A photon, or quanta, is the "packet" of energy that is sent in a light wave. Like a particle, the photon is believed to have a finite mass, and has the ability to affect other matter. As light strikes a photovoltaic solar cell, it knocks electrons in the sil .....

.... color because they are dying, that thought is dismissed from the mind because of the beauty in that event which the eye beholds-with humans it should be the same thing. People should not feel sad seeing their elder loved ones change their colors and whither but rather rejoice from the knowledge that they lived a magnificent life and their death is merely the start of a new beginning. After all the leaves have fallen, and the ground is littered in seas of immense color, the very structure that carried the leaves remains-the trees. They live on long after the leaves have fallen and died and remind us that no matter how long, cold, and terrible the winte .....

.... can begin to understand the stars by understanding what fusion is, how it affects the life of a star, and what happens to a star when fusion can no longer occur. The first question one must ask is, "What is fusion?" One simple way of explaining it is taking two balls of clay and mashing them into one, creating a new, larger particle from the two. Now replace those balls of clay with sub-atomic particles, and when they meld, release an enormous amount of energy. This is fusion. There is currently three known variations of fusion: the proton-proton reaction (Figure 1.1), the carbon cycle (Figure 1.2), and the triple-alpha process (Figure 1.3). I .....

.... blue in sapphires. How Aluminium deposits are formed Aluminium (like many other metals) is not found in it's pure form, but associated with other elements in rocks and minerals. An aluminosilicate such as felspar (KAlSi3O8) is the main constituent of many rocks such as granite, which is quartz and mica cemented together with felspar. These rocks are gradually weathered and broken down by the action of carbon-dioxide from the air dissolved in rainwater forming ‘kaolin'. This is further broken down to form other substances, ultimately resulting in the formation of Aluminium deposits. Where and how Aluminium is mined? Aluminium is never found in i .....

.... another thing that is threatening our planet. Everyone who wants to be anyone “must have” whatever is cool at the time. This usually means the biggest, meanest, least efficient car or the fanciest toys, generally leading to wasteful packaging and harmful chemicals or other bad stuff. “In short, Impact = Population * Affluence * Technology.” (Ehrlich, 1990) The problem is that everyone cares too much about societies image of them that they don’t think about the results of their actions. We also have a problem with the consumption of our resources. Many of the resources that we rely like fossil fuels, forests, and water a .....

.... If the tumor occurs in the supraglottis, or the section above the vocal cords, it may cause a lump in the throat, sore throat, or earaches. When the tumor develops in the area where the larynx and trachea join, subglottis, the person experiences trouble in breathing, very noisy breathing. Constant coughing or a feeling of a lump that doesn’t go away are also signs of larynx cancer. Tumor development in the subglottis is very unusual and rare. As a tumor grows it may cause pain, weight loss, bad breath, frequent choking on food, and hard swallowing. Only qualified doctors are able to tell if any of the signs are really symptoms of the canc .....