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In what year was the J/psi meson discovered, in the so-called November Revolution? Answer with the four-digit year only.
In what year did the Tunguska event flatten forest in Siberia? Answer with the four-digit year only.
In what year did the Panama Canal open? Answer with the four-digit year only.
Norway is a member of the European Union. Answer true or false.
Which mountain range forms most of the border between France and Spain? Answer with the English name only, one word.
In what year was Voyager 1 launched? Answer with the four-digit year only.
What is the two-character IATA code of Emirates? Answer with the two-character code only.
Lufthansa is headquartered in France. Answer true or false.
What is the deepest lake in the world? Answer with the lake name only, without the word Lake.
Saturn's average density is lower than that of water. Answer true or false.
Airport code FCO belongs to the main international airport of which city? Answer with the city name only.
What is the name of Russia's state space corporation? Answer with the name only.
What is the longest river in Asia? Answer with the English river name only, without the word River.
How many Great Lakes of North America are there? Answer with the whole number only.
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 was Niels Bohr awarded the Nobel Prize in Physics? Answer with the four-digit year only.
What is the SI unit of electrical resistance? Answer with the unit name only, in lowercase.
In what year did Edwin Hubble publish the relation between galaxy distance and recession velocity? Answer with the four-digit year only.
Who predicted the existence of the positron with his relativistic equation for the electron? Answer with the surname only.
Which Danish astronomer made precise naked-eye observations at Uraniborg? Answer with the surname only.
What is the capital of Nigeria? Answer with the city name only.
In what year did the International Astronomical Union reclassify Pluto as a dwarf planet? Answer with the four-digit year only.
How many neutrons are in the nucleus of carbon-12? Answer with the whole number only.
How many characters long is an ICAO airport code? Answer with the whole number only.
In what year did US Airways Flight 1549 land on the Hudson River? Answer with the four-digit year only.