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In what year was the Mir space station deorbited? Answer with the four-digit year only.
In what year did Arthur Eddington's solar eclipse expedition measure the bending of starlight? Answer with the four-digit year only.
In what year did Max Planck present his quantum hypothesis for black-body radiation? Answer with the four-digit year only.
What is the two-character IATA code of Korean Air? Answer with the two-character code only.
How many sovereign countries in Africa are UN member states? Answer with the whole number only.
What is the IATA code of Tokyo Haneda Airport? Answer with the three-letter code only.
In what year did the Boeing 737 make its first flight? Answer with the four-digit year only.
In what year did Chang'e 4 make the first soft landing on the far side of the Moon? Answer with the four-digit year only.
In what year was Richard Feynman awarded the Nobel Prize in Physics? Answer with the four-digit year only.
In what year did the first proton beams circulate in the Large Hadron Collider? Answer with the four-digit year only.
What is the SI unit of radioactivity? Answer with the unit name only, in lowercase.
Of which US institute was Anthony Fauci director? Answer with the institute's abbreviation only.
Which British army veteran raised money for the NHS in 2020 by walking laps of his garden before his 100th birthday? Answer with the surname only.
Who discovered radioactivity in uranium in 1896? Answer with the surname only.
In what year did Krakatoa's catastrophic eruption occur? Answer with the four-digit year only.
Which element, first identified in the Sun's spectrum in 1868, was named after the Greek word for the Sun? Answer with the element name only, in English.
Which element is the most abundant in Earth's crust by mass? Answer with the element name only, in English.
Which is the largest moon in the Solar System? Answer with the moon's name only.
How many base units are there in the International System of Units (SI)? Answer with the whole number only.
In what year was the Paris Agreement on climate change adopted? Answer with the four-digit year only.
Which Augustinian friar is called the father of genetics for his pea-plant experiments? Answer with the surname only.
Which blood type is known as the universal red-cell donor? Answer with the blood type only, e.g. AB+.
How many carbon atoms are in one molecule of benzene? Answer with the whole number only.
What is the SI unit of power? Answer with the name only.
In what year was the Kyoto Protocol adopted? Answer with the four-digit year only.