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In what year did Johannes Kepler publish Astronomia nova? Answer with the four-digit year only.
In what year did the Ingenuity helicopter make the first powered flight on Mars? Answer with the four-digit year only.
In which country is the ancient city of Petra? Answer with the country name only.
In what year did South Sudan become independent? Answer with the four-digit year only.
How many states does the United States have? Answer with the whole number only.
In what year was Qantas founded? Answer with the four-digit year only.
In what year did Namibia become independent? Answer with the four-digit year only.
Who founded Virgin Atlantic? Answer with the surname only.
What is the capital of Iran? Answer with the city name only.
In what year did the de Havilland Comet begin the world's first scheduled jet airliner service? Answer with the four-digit year only.
In what year was Cathay Pacific founded? Answer with the four-digit year only.
How many Apollo missions landed astronauts on the Moon? Answer with the whole number only.
Who discovered the neutron in 1932? Answer with the surname only.
In what year did Alitalia stop flying and hand over to ITA Airways? Answer with the four-digit year only.
At which cosmodrome in Kazakhstan did Gagarin's flight launch? Answer with the name only.
What is the capital of Afghanistan? Answer with the city name only.
How many autonomous communities does Spain have? Answer with the whole number only.
In what year did Charles Lindbergh fly solo nonstop from New York to Paris? Answer with the four-digit year only.
In which country is Angel Falls, the world's highest uninterrupted waterfall? Answer with the country name only.
In what year did the Suez Canal open? Answer with the four-digit year only.
What is the largest moon of Saturn? Answer with the name only.
Ryanair is headquartered in Ireland. Answer true or false.
In what year did the Tata Group take back control of Air India from the government? Answer with the four-digit year only.
In what year was 51 Pegasi b, the first exoplanet found orbiting a Sun-like star, announced? Answer with the four-digit year only.
In what year did Fermilab announce the discovery of the top quark? Answer with the four-digit year only.