Trilobites went extinct around 250 million years ago. The Louvre opened as a public museum in 1793 in Paris, France. LED stands for light-emitting diode. Hello in Arabic is salam. The uranium and plutonium bombs dropped by the U.S. killed around 200,000 Japanese people in 1945. Alfred Hitchcock was born in 1899 and died in

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Albert, Samuel, Harry, and Jack Warner created Warner Brothers in 1913. 175,000 people live in the Himalaya Mountains. Leewenhock is the microbiologist who first observed protozoa in 1670s. Lucille Ball was born in 1911 and died in 1989. San Marino has about 33,000 people in this small European country. The pyramid of Djoser in Egypt

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