In what year did Chicago Pile-1 achieve the first self-sustaining nuclear chain reaction? Answer with the four-digit year only.
In what year was the Boeing 737 MAX grounded worldwide after two crashes? Answer with the four-digit year only.
What is the largest hot desert in the world? Answer with the desert name only, without the word Desert.
In what year did the Apollo 1 cabin fire occur? Answer with the four-digit year only.
How many member states does the European Union have, as of 2025? Answer with the whole number only.
In what year did Japan Airlines file for bankruptcy protection? Answer with the four-digit year only.
What is the two-character IATA code of Air France? Answer with the two-character code only.
What is the height of Mount Kilimanjaro in meters, as usually cited? Answer with the whole number only.
Which strait separates Spain from Morocco? Answer with the strait name only, without the words Strait of.
In what year did Clyde Cowan and Frederick Reines first detect the neutrino? Answer with the four-digit year only.
In what year did the Swissair fleet grounding occur? Answer with the four-digit year only.
What is the standard mains frequency of the electricity grid in the United States, in hertz? Answer with the whole number only.
In what year was the first Bose-Einstein condensate produced in a laboratory? Answer with the four-digit year only.
What is the two-character IATA code of Southwest Airlines? Answer with the two-character code only.
What is the capital of Hungary? Answer with the city name only.
In what year did STS-1, the first Space Shuttle mission, launch? Answer with the four-digit year only.
In what year did Paul Dirac and Erwin Schrodinger share the Nobel Prize in Physics? Answer with the four-digit year only.
What is the two-character IATA code of United Airlines? Answer with the two-character code only.
Who formulated the exclusion principle, which says two electrons cannot share the same quantum state? Answer with the surname only.
In what year did the Curiosity rover land on Mars? Answer with the four-digit year only.
