In what year did Charles Lindbergh fly solo nonstop from New York to Paris? Answer with the four-digit year only.
How many Nobel Prizes in Physics did John Bardeen win? Answer with the whole number only.
In which country is Angel Falls, the world's highest uninterrupted waterfall? Answer with the country name only.
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 did the Boeing 747 enter commercial service? Answer with the four-digit year only.
In what year did Marie Curie win her first Nobel Prize, the one in physics? Answer with the four-digit year only.
In what year did Heike Kamerlingh Onnes discover superconductivity? Answer with the four-digit year only.
In what year did Alexei Leonov perform the first spacewalk? Answer with the four-digit year only.
What is the IATA code of Hartsfield-Jackson Atlanta International Airport? Answer with the three-letter code only.
Airport code KEF belongs to the main international airport of which country? Answer with the country name only.
In what year did Yuri Gagarin become the first human in space? Answer with the four-digit year only.
Sydney is the capital of Australia. Answer true or false.
In what year was the core module of the Mir space station launched? Answer with the four-digit year only.
Who unified electricity, magnetism and light in a set of equations in the 1860s? Answer with the surname only.
What is the two-character IATA code of Cathay Pacific? Answer with the two-character code only.
In what year did LIGO record GW150914, the first direct detection of gravitational waves? Answer with the four-digit year only.
