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History of the Propeller The aircraft propeller looks like a simple mechanism to the uneducated individual. To the educated, an aircraft propeller represents the highest sophistication in aerodynamics, mechanical engineering and structural design. This report will touch on the history of the propeller, from early pioneers/experiment...
Mars is the fourth furthest away from the sun and is recognized by its reddish color. Mars is also very much like the Earth. " More than any other planet in the solar system, Mars has characteristics that make it an Earth-like world "(Grolier, 1992). One thing that is very similar to Earth is the rotation period. Mars rotation period is only th...
Myopic little men in tuxedos, or highly efficient land/water animals? Recent research indicates there?s more to penguins than meets the eye. If you?ve every wondered what it would be like to be able to see as clearly under water as you can on land, just ask the nearest penguin.Most aquatic animals are short-sighted on land. Most...
Hurricanes A natural hazard is when extreme events which cause great loss of life and or property and create severe disruption to human lives, such as a hurricane. Editor Philip Whitefield brings up an important point in ? Our Mysterious Planet? when he comments; ?At a time when we know how to aim a space probe directly at Mars and tr...
Hepatitis B can be prevented with a highly effective vaccine, but this year ten to thirty million people will become infected with the hepatitis B virus. I feel that because this disease is preventable, only knowledge can help reduce the number of people infected. Hepatitis B is a serious liver disease caused by the hepatitis B virus...
