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In what year did the Philae lander touch down on a comet? Answer with the four-digit year only.
Which planet is closest to the Sun? Answer with the name only.
How many regions does metropolitan France have? Answer with the whole number only.
In what year was Halley's Comet last at perihelion? Answer with the four-digit year only.
In what year did Erwin Schrodinger publish his wave equation? Answer with the four-digit year only.
In what year did the Cassini spacecraft end its mission by plunging into Saturn? Answer with the four-digit year only.
In what year did Stephen Hawking die? Answer with the four-digit year only.
In what year did Japan Airlines Flight 123 crash, the deadliest single-aircraft accident? Answer with the four-digit year only.
Photons have zero rest mass. Answer true or false.
In what year was the Dominion of Canada formed by Confederation? Answer with the four-digit year only.
In what year did American Airlines and US Airways complete their merger? Answer with the four-digit year only.
In what year was the European Space Agency established? Answer with the four-digit year only.
How many engines does the Airbus A380 have? Answer with the whole number only.
In what year did Monarch Airlines collapse? Answer with the four-digit year only.
In what year did Czechoslovakia split into the Czech Republic and Slovakia? 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.
How many neutrons are in the nucleus of uranium-238? Answer with the whole number only.
In what year did easyJet operate its first flight? Answer with the four-digit year only.
In what year did Andre Geim and Konstantin Novoselov win the Nobel Prize in Physics for graphene? Answer with the four-digit year only.
In what year did the Boeing 777 enter commercial service? Answer with the four-digit year only.
In what year did the Space Shuttle program fly its final mission? Answer with the four-digit year only.
In what year did the Juno spacecraft enter orbit around Jupiter? Answer with the four-digit year only.
A free proton is heavier than a free neutron. Answer true or false.
Which strait separates Asia from North America? Answer with the strait name only, without the word Strait.
What is the most populous country in Africa? Answer with the country name only.