In what year did the Tenerife airport disaster, the deadliest accident in aviation history, occur? Answer with the four-digit year only.
What was the name of the Soviet and Russian space station that was deorbited in 2001? Answer with the name only.
In what year did Alitalia stop flying and hand over to ITA Airways? 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.
What is the capital of Vietnam? Answer with the city name only.
In what year did Alessandro Volta announce the voltaic pile, the first electric battery? Answer with the four-digit year only.
Bolivia is landlocked. Answer true or false.
In what year was Concorde retired from commercial service? Answer with the four-digit year only.
In what year did the Airbus A320 enter commercial service? Answer with the four-digit year only.
In what year did SpaceX fly astronauts for the first time, on the Demo-2 mission? Answer with the four-digit year only.
In what year did Pan American World Airways cease operations? Answer with the four-digit year only.
In what year did Alain Aspect, John Clauser and Anton Zeilinger win the Nobel Prize in Physics? Answer with the four-digit year only.
Victoria Falls lies on which river? Answer with the river name only, without the word River.
What is the two-character IATA code of Swiss International Air Lines? Answer with the two-character code only.
In what year did the Tunguska event flatten forest in Siberia? Answer with the four-digit year only.
Which mountain range forms most of the border between France and Spain? Answer with the English name only, one word.
In what year was Niels Bohr awarded the Nobel Prize in Physics? Answer with the four-digit year only.
What is the deepest lake in the world? Answer with the lake name only, without the word Lake.
What is the largest freshwater lake in the world by surface area? Answer with the lake name only, without the word Lake.
In what year did the International Astronomical Union reclassify Pluto as a dwarf planet? Answer with the four-digit year only.
What is the capital of Nigeria? Answer with the city name only.
