[Ans] How did Thomas Edison propose marriage to his second wife Mina Miller?

Step 1 : Introduction to the question "How did Thomas Edison propose marriage to his second wife Mina Miller?"

Thomas Edison was one of history's most influential inventors, but his ingenuity didn't end there. Edison taught his second wife, Mina Miller, Morse code so the two could secretly communicate with each other, even while the family watched. It went beyond that purpose when he actually proposed to Mina in Morse code. When the time came, Edison asked, -- --- ..- .-.. -.. -.-- --- ..- -- .- .-. .-. -.-- -- . ("Will you marry me?") to which she replied -.-- . .. "Yes." The two were married on February 24, 1886. Edison even nicknamed his two eldest children "Dot" and "Dash," a reference to the dots and dashes used in Morse code.

[Answer] How did Thomas Edison propose marriage to his second wife Mina Miller?

Step 1 : Introduction to the question "How did Thomas Edison propose marriage to his second wife Mina Miller?"

...Thomas Edison was one of history's most influential inventors, but his ingenuity didn't end there. Edison taught his second wife, Mina Miller, Morse code so the two could secretly communicate with each other, even while the family watched. However, it went beyond that purpose when he actually proposed to Mina in Morse code. When the time came, he asked. -- --- ..- .-.. -.. -.-- --- ..- -- .- .-. .-. -.-- -- ., ("Will you marry me?") to which she replied -.-- . .. "Yes." The two were married on February 24, 1886. Edison even nicknamed his two eldest children "Dot" and "Dash," a reference to the dots and dashes used in Morse code.

[Answer] What were the first words spoken by Thomas Edison when he made the first recording of the human voice?

Step 1 : Introduction to the question "What were the first words spoken by Thomas Edison when he made the first recording of the human voice?"

...On this day in 1877, Thomas A. Edison unveiled his invention of the phonograph, a way to record and play back sound. Edison stumbled on one of his greatest inventions–the phonograph–while working on a way to record telephone communication at his laboratory in Menlo Park, New Jersey. His work led him to experiment with a stylus on a tinfoil cylinder, which, to his surprise, played back the words he had recorded, “Mary had a little lamb”. Public demonstrations of the phonograph made the inventor world famous, and he was dubbed the “Wizard of Menlo Park.”

[Ans] What problem did Winston Churchill, Thomas Edison, Albert Einstein and General George S. Patton have in common?

Step 1 : Introduction to the question "What problem did Winston Churchill, Thomas Edison, Albert Einstein and General George S. Patton have in common?"

Winston Churchill was a British politician and statesman who served as the Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955.

Thomas Alva Edison was an American inventor and businessman, who has been described as America's greatest inventor.

Albert Einstein was German-born theoretical physicist. Einstein developed the theory of relativity, one of the two pillars of modern physics. 

George Smith was a senior officer of the United States Army who commanded the U.S. Seventh Army in the Mediterranean and European theaters of World War II.