The United States exhibited the country’s first-ever lion in Boston.
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NASA launched the Mars Science Laboratory probe, which carried the Curiosity Rover to Mars.
The New York and Harlem Railroad became the first railroad to operate in the US.
The UK-based computer company Raspberry Pi released their $5 (£4) computer.
Queen Elizabeth II became Britain's first monarch to pay income tax.
J.B. Sutherland from Detroit patented refrigerated railroad cars.