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In what year did Yuri Gagarin become the first human in space? Answer with the four-digit year only.
In what year did Air Berlin cease operations? Answer with the four-digit year only.
How many engines did Concorde have? Answer with the whole number 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.
The Great Red Spot is a storm on Saturn. Answer true or false.
Victoria Falls lies on which river? Answer with the river name only, without the word River.
Who discovered radioactivity in 1896? Answer with the surname only.
What is the two-character IATA code of Swiss International Air Lines? Answer with the two-character code only.
The neutron carries a positive electric charge. Answer true or false.
What is the capital of Norway? Answer with the city name only.
In what year did the Tunguska event flatten forest in Siberia? Answer with the four-digit year only.
In what year did LIGO record GW150914, the first direct detection of gravitational waves? 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 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.
In what year was Niels Bohr awarded the Nobel Prize in Physics? Answer with the four-digit year only.
Airport code FCO belongs to the main international airport of which city? Answer with the city name 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.
What is the longest river in Asia? Answer with the English river name only, without the word River.
What is the SI unit of electrical resistance? Answer with the unit name only, in lowercase.
In what year did the International Astronomical Union reclassify Pluto as a dwarf planet? Answer with the four-digit year only.
Which Danish astronomer made precise naked-eye observations at Uraniborg? Answer with the surname only.
Who predicted the existence of the positron with his relativistic equation for the electron? Answer with the surname only.
How many neutrons are in the nucleus of carbon-12? Answer with the whole number only.