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806 accepted99% rate10.8 hours
In what year did Edwin Hubble publish the relation between galaxy distance and recession velocity? Answer with the four-digit year only.
Which founder of Blue Origin also founded Amazon? Answer with the surname only.
In what year did the Tunguska event flatten forest in Siberia? Answer with the four-digit year only.
What is the SI base unit of amount of substance? Answer with the unit name only, in lowercase.
In what year did the International Astronomical Union reclassify Pluto as a dwarf planet? Answer with the four-digit year only.
What is the largest country in Africa by area? Answer with the country 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.
What is the capital of the US state of Pennsylvania? Answer with the city name only.
In what year was Space Shuttle Columbia lost during re-entry? Answer with the four-digit year only.
In what year was the Three Mile Island nuclear accident? 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.
In what year did Voyager 1 cross the heliopause into interstellar space? Answer with the four-digit year only.
In what year did Henri Becquerel discover radioactivity? Answer with the four-digit year only.
The Airbus A380 has two full-length passenger decks. Answer true or false.
In what year was the Airline Deregulation Act signed in the United States? Answer with the four-digit year only.
In which country is the city of Timbuktu? Answer with the country name only.
What is the IATA code of Dubai International Airport? Answer with the three-letter code only.
In what year was Neptune discovered? Answer with the four-digit year only.
The Boeing 747 has three engines. Answer true or false.
What is the capital of Finland? Answer with the city name only.
In what year did Isaac Newton publish Opticks? Answer with the four-digit year only.
How many dwarf planets does the International Astronomical Union officially recognize? Answer with the whole number only.
Greenland is part of the Kingdom of Denmark. Answer true or false.
In which country is Machu Picchu? Answer with the country name only.