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In what year did London Heathrow's Terminal 5 open? Answer with the four-digit year only.
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 founder of Blue Origin also founded Amazon? Answer with the surname only.
What is the capital of Nigeria? Answer with the city name only.
Saturn's average density is lower than that of water. Answer true or false.
What is the SI base unit of amount of substance? Answer with the unit name only, in lowercase.
How many characters long is an ICAO airport code? Answer with the whole number only.
How many sovereign countries are there in South America? Answer with the whole number only.
Gamma rays have a higher frequency than radio waves. Answer true or false.
How many hexagonal segments make up the James Webb Space Telescope's primary mirror? Answer with the whole number only.
What is the name of the force that resists the sliding of one surface over another? Answer with the one-word name only, in lowercase.
What is the capital of the US state of Pennsylvania? Answer with the city name only.
In what year was the kilogram redefined in terms of the Planck constant, taking effect on 20 May? Answer with the four-digit year only.
Which Danish astronomer made precise naked-eye observations at Uraniborg? Answer with the surname only.
In what year was Space Shuttle Columbia lost during re-entry? Answer with the four-digit year only.
How many emirates make up the United Arab Emirates? Answer with the whole number only.
Which sea lies between Italy and the Balkan Peninsula? Answer with the sea name only, without the word Sea.
How many meters is one astronomical unit, as defined exactly by the IAU in 2012? Answer with the whole number only.
In what year did Wilhelm Roentgen discover X-rays? Answer with the four-digit year only.
In what year did US Airways Flight 1549 land on the Hudson River? Answer with the four-digit year only.
What is the largest moon in the Solar System? Answer with the name only.
What is the capital of Ghana? Answer with the city name only.
How many Space Shuttle orbiters flew in space? Answer with the whole number only.
In what year was the Three Mile Island nuclear accident? Answer with the four-digit year only.