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Eratosthenes was appointed chief librarian at the age of 40 when the previous librarian of the Library of Alexandria died.
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Eratosthenes accurately calculated the tilt of the Earth's axis using trigonometry and geometry.
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Eratosthenes made a map of the known world and made a system of longitude and latitude.
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Eratosthenes used the position of the sun as well as the distance from Alexandria to Syene to calculate the circumference of the Earth. Some believe that his calculations only had a 2% error.
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This is when the universe first started. It wouldn't allow me to make it 14 billion years ago as the date, but that is when it first came into existence.
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The period in time when men and women started challenging traditional beliefs and values.
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This allowed for the great exchange of resources, animals, cattle and disease.
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This reformation brought back the church to its biblical roots. This created the Catholics and Protestants.
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The war against Britain, which lead to the creation of The United States of America.
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Mendeleev publishes his book, which gets him the Domidov Prize.
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The first edition of the book, which gave people much insight on chemistry back then.
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Mendeleev creates the periodic table, furthering the organization of the elements.
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Alfred Wegner's Life
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Mendeleev gets fired from his university for supporting student dissent.
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Mendeleev gets awarded the Copley Medal from the Royal Society of England
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Wegener and his brother Kurt set the world record for longest time spent in the air with a hot air balloon. He later went on an expedition to track air circulation with the help of the balloons.
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Alfred Wegener started teaching at the University of Marburg.
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Wegener noticed on a world map that the east coast of South America fits exactly with the west coast of Africa. This is his first notice of Pangea.
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Wegener wrote his book with Vladmir Koppen, and it soon became popular.
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Wegener produced evidence that the continents were in motion, but he couldn't prove what forces pushed them apart. This caused widespread scorn for Wegener.
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The first time a large war had occurred and multiple countries choose sides.
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Wegener accepted a professorship of meteorology and geophysics at the University of Graz in Austria
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The worldwide economic depression that took place as a result of inflation.
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A state of tension as the U.S. and the U.S.S.R kept getting involved in proxy wars over communism and nuclear bombs.
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Hess' new book talking about the ocean floors and how continental drift was true. He used sounding gear and saw the ocean floor was rugged and mismatched instead of smooth.
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This is when i flew from India to America
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This was my first move through America, and it changed everything. I went from slightly cold days and snow to freezing all-year round.
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This was another large move, and also the final move for me during my childhood.
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During this time period, we lived in a small apartment, where i met my some of my best friends.
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The move from the apartment to the house caused me to change schools, a big change because it was my first year of middle school
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This was a big change for me, because I decided my self to go somewhere else for high school instead of the charter school I was in before.
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My move to MRHS was largely due to wanting to be more involved with sports. This is when I picked up tennis. Later on, tennis became a big part of my life.
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This visit made me a lot wiser, as I saw how much better it was to live in America, and how it would have been a lot tougher in India. It helped me realize that I needed to work hard and improve myself.
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In order to improve my grade and make sure that I made it to college, I decided to take online classes.
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Wegener found more evidence that the continents were all joined together in the past and used it to publish his book. However, scientists thought that he was incorrect.
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