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How many spacetime dimensions does M-theory have? Answer with the whole number only.
In what year did Paul Dirac publish his relativistic equation for the electron? Answer with the four-digit year only.
Greenland is part of the Kingdom of Denmark. Answer true or false.
What is the two-character IATA code of Norwegian Air Shuttle? Answer with the two-character code only.
In what year was Zarya, the first module of the International Space Station, launched? Answer with the four-digit year only.
What is the exact defined speed of light in vacuum, in meters per second? Answer with the whole number only.
How many dwarf planets does the International Astronomical Union officially recognize? Answer with the whole number only.
What is the largest country in the world by area? Answer with the country name only.
Venus is the hottest planet in the Solar System. Answer true or false.
In what year did the Chelyabinsk meteor explode over Russia? Answer with the four-digit year only.
In what year did Stephen Hawking publish his prediction that black holes emit radiation, in Nature? Answer with the four-digit year only.
In what year did Hawaii become a US state? Answer with the four-digit year only.
In what year was KLM founded? Answer with the four-digit year only.
What is the IATA code of Paris Charles de Gaulle Airport? Answer with the three-letter code only.
What is the capital of Pakistan? Answer with the city name only.
In what year was CERN founded? Answer with the four-digit year only.
In what year was Tata Airlines, which became Air India, founded? Answer with the four-digit year only.
How many engines did the McDonnell Douglas DC-10 have? Answer with the whole number only.
In what year did Clyde Tombaugh discover Pluto? Answer with the four-digit year only.
How many provinces does Canada have? Answer with the whole number only.
What is the two-character IATA code of Etihad Airways? Answer with the two-character code only.
In what year did Alaska Air Group complete its acquisition of Hawaiian Airlines? Answer with the four-digit year only.
How many astronauts flew on Apollo 11? Answer with the whole number only.
How many engines does the Boeing 747 have? Answer with the whole number only.
Which US airline did Herb Kelleher co-found? Answer with the one-word name only, without the word Airlines.