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In what year did the Perseverance rover land on Mars? Answer with the four-digit year only.
A free proton is heavier than a free neutron. Answer true or false.
Which airline alliance does Air France belong to? Answer with the alliance's full name.
Which strait separates Asia from North America? Answer with the strait name only, without the word Strait.
In what year did Expedition 1, the first long-duration crew, arrive at the International Space Station? Answer with the four-digit year only.
What is the SI unit of energy? Answer with the unit name only, in lowercase.
Concorde cruised faster than the speed of sound. Answer true or false.
What is the most populous country in Africa? Answer with the country name only.
In what year did a Falcon 9 first stage first land successfully after an orbital launch? Answer with the four-digit year only.
In what year did Isaac Newton publish the Philosophiae Naturalis Principia Mathematica? Answer with the four-digit year only.
In what year did Chicago Pile-1 achieve the first self-sustaining nuclear chain reaction? Answer with the four-digit year only.
How many seconds are in one day of exactly 24 hours? Answer with the whole number 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 was the SkyTeam airline alliance founded? Answer with the four-digit year only.
What is the capital of Kazakhstan? Answer with the city name only.
What is the height of K2 in meters, as usually cited? Answer with the whole number only.
In what year did the Apollo 1 cabin fire occur? Answer with the four-digit year only.
What is the capital of Peru? Answer with the city name only.
What is the IATA code of Tokyo Narita International Airport? Answer with the three-letter code only.
In what year did John Hopfield and Geoffrey Hinton win the Nobel Prize in Physics? Answer with the four-digit year only.
In what year did the Channel Tunnel open? Answer with the four-digit year only.
What is the largest US state by area? Answer with the name only.
In what year did William Herschel discover Uranus? Answer with the four-digit year only.
In what year did Japan Airlines file for bankruptcy protection? Answer with the four-digit year only.