The story of Robinson Crusoe was written by Daniel Defoe, an English journalist, in 1719. This book was very successful and is still popular. Defoe was inspired by real stories, including that of Alexander Selkirk, a Scottish sailor who survived a sinking. In this novel, Defoe describes Robinson's lonely life, wrecked on a deserted island for twenty-eight years
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About 250 kinds of fish can produce electric shock. This allows them to head into muddy waters and also kill t...
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A simple periscope can be done using two flat mirrors, inclined at 45 °. The light is reflected by the mirror from the top to the bottom.... -
The easter island is located in the middle of the Pacific, 3540 km west of Chile. His monumental statues ...
How does a periscope work?
A simple periscope can be done using two flat mirrors, inclined at 45 °. The light is reflected by the mirror from the top to the bottom....
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