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2024年5月31日 · Together with Twain’s novel The Adventures of Tom Sawyer (1876), Adventures of Huckleberry Finn changed the course of children’s literature in the United States as well as of American literature generally, presenting the first deeply felt portrayal of boyhood.
- The Editors of Encyclopaedia Britannica
Vilhjalmur Stefansson was a Canadian-born American explorer and ethnologist who spent five consecutive record-making years exploring vast areas of the Canadian Arctic after adapting himself to the Inuit (Eskimo) way of life. Of Icelandic descent, Stefansson lived for a year among the Inuit in.
- The Editors of Encyclopaedia Britannica
- Overview
- Childhood and education
Albert Einstein was a famous physicist. His research spanned from quantum mechanics to theories about gravity and motion. After publishing some groundbreaking papers, Einstein toured the world and gave speeches about his discoveries. In 1921 he won the Nobel Prize for Physics for his discovery of the photoelectric effect.
Read more below: From graduation to the “miracle year” of scientific theories
What is Albert Einstein known for?
Albert Einstein is best known for his equation E = mc2, which states that energy and mass (matter) are the same thing, just in different forms. He is also known for his discovery of the photoelectric effect, for which he won the Nobel Prize for Physics in 1921. Einstein developed a theory of special and general relativity, which helped to complicate and expand upon theories that had been put forth by Isaac Newton over 200 years prior.
How Albert Einstein Developed the Theory of General Relativity
Learn more about why it took Albert Einstein years to express his ideas mathematically.
Einstein’s parents were secular, middle-class Jews. His father, Hermann Einstein, was originally a featherbed salesman and later ran an electrochemical factory with moderate success. His mother, the former Pauline Koch, ran the family household. He had one sister, Maria (who went by the name Maja), born two years after Albert.
Einstein would write that two “wonders” deeply affected his early years. The first was his encounter with a compass at age five. He was mystified that invisible forces could deflect the needle. This would lead to a lifelong fascination with invisible forces. The second wonder came at age 12 when he discovered a book of geometry, which he devoured, calling it his “sacred little geometry book.”
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All About Einstein
Einstein became deeply religious at age 12, even composing several songs in praise of God and chanting religious songs on the way to school. This began to change, however, after he read science books that contradicted his religious beliefs. This challenge to established authority left a deep and lasting impression. At the Luitpold Gymnasium, Einstein often felt out of place and victimized by a Prussian-style educational system that seemed to stifle originality and creativity. One teacher even told him that he would never amount to anything.
Yet another important influence on Einstein was a young medical student, Max Talmud (later Max Talmey), who often had dinner at the Einstein home. Talmud became an informal tutor, introducing Einstein to higher mathematics and philosophy. A pivotal turning point occurred when Einstein was 16 years old. Talmud had earlier introduced him to a children’s science series by Aaron Bernstein, Naturwissenschaftliche Volksbucher (1867–68; Popular Books on Physical Science), in which the author imagined riding alongside electricity that was traveling inside a telegraph wire. Einstein then asked himself the question that would dominate his thinking for the next 10 years: What would a light beam look like if you could run alongside it? If light were a wave, then the light beam should appear stationary, like a frozen wave. Even as a child, though, he knew that stationary light waves had never been seen, so there was a paradox. Einstein also wrote his first “scientific paper” at that time (“The Investigation of the State of Aether in Magnetic Fields”).
As the head of the government of the United States, the president is arguably the most powerful government official in the world. The president is elected to a four-year term via an electoral college system. Since the Twenty-second Amendment was adopted in 1951, the American presidency has been limited to a maximum of two terms.
Franz Ferdinand, archduke of Austria-Este (born December 18, 1863, Graz, Austria—died June 28, 1914, Sarajevo, Bosnia and Herzegovina, Austria-Hungary [now in Bosnia and Herzogovina]) was the archduke of Austria-Este. His assassination in 1914 was the immediate cause of World War I.
One of the most famous paintings in the world, the Last Supper was commissioned by Ludovico Sforza, duke of Milan and Leonardo’s patron during his first stay in that city, for the Dominican monastery of Santa Maria delle Grazie.
The United Kingdom is a constitutional monarchy, in which the monarch shares power with a constitutionally organized government. The reigning king or queen is the country’s head of state. All political power rests with the prime minister (the head of government) and the cabinet, and the monarch.
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