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Oceanography
Many people who have been to the ocean have tried to drink the water found therein. That (sadly) includes me. Unfortunately, we have all discovered that ocean water is salty and quite disgusting. Ocean water has an average salinity of 35PPT, or 35 parts of salt in a thousand parts
Anatomy
Orthodontics is the practice of straightening teeth and correcting how they line up. One of the reasons why straight teeth are important is because they are easier to brush and floss properly. People have been trying to correct tooth alignment for thousands of years, but modern orthodontics began around 1850.
Oceanography
The hydrologic, or water cycle, is one of the most important systems on this planet because it replenishes water. The water cycle starts when water from the oceans and lakes is evaporated by the sun. This water goes up into the air in the form of clouds. After the water
Literature
Miguel de Cervantes was a soldier, a prisoner of war, and a writer in the Renaissance period. Miguel was born near Madrid in 1547. He was the fourth of seven children and was the son of a deaf surgeon, which was a lowly trade at the time. Miguel was taught
Literature
Johann Gutenberg was one of the most important inventors of the Renaissance because he invented the printing press. Johann was the son of a goldsmith, so he learned how to make metal objects. Back in his day, goldsmiths made not only jewelry, but also plates, cups, implements, and other useful
History
Niccolò Machiavelli was born in Florence in 1469 and died in 1527. Machiavelli's father was a lawyer, so his son received a good education and became a secretary for the city of Florence. Machiavelli was a diplomat, general, and a writer. He is best remembered for writing two
History
The Dark Ages were a period of time in which learning was slowed down due to the lack of learning materials (like books). During this time, people were usually taught by monks in monasteries or in churches. The Dark Ages lasted from the 5th to the 14th centuries. Feudalism was
Oceanography
The ocean floor is a fascinating place on which there are many interesting features. Some notable ones that come to mind are volcanoes and trenches, but there are many others. The continental shelf is the part of the ocean floor next to the edges of continents. Because it is so
History
In Medieval England, the feudal system was in place. In this system of government, the peasants were at the bottom and had the least rights. The nobles had more rights than the peasants and could own land, on which the peasants resided. Finally, the king had all the rights over
Anatomy
Digestion is a very important process because it gives your body the energy it needs to work. This process is mostly chemical, but also partly mechanical. Breaking down the food begins in the mouth, where your teeth turn the large chunks of food into smaller bits and pieces. In the
Literature
Exposition In 1866, the captain of a steam ship called the Governor Higginson spotted a large mass in the water five miles off the shores of Australia. He thought that this object was a previously unknown reef, and was starting to mark it on his map when two waterspouts shot
History
The Black Death started in 1346 when rats from China started to flee the dried-out grasslands there. Previously, there had been a serious famine in the region, and the lack of rain dried up the grasslands and forced the rats to move. Now, the rats were not the problem, but