In what year did a door plug blow out of an Alaska Airlines Boeing 737 MAX 9 over Oregon? Answer with the four-digit year only.
In what year was Halley's Comet last at perihelion? Answer with the four-digit year only.
In what year did the Boeing 707 enter commercial service? Answer with the four-digit year only.
In what year did the Philae lander touch down on a comet? Answer with the four-digit year only.
Which astronomer formulated the three laws of planetary motion? Answer with the surname only.
In what year did American Airlines and US Airways complete their merger? 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 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 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 Andre Geim and Konstantin Novoselov win the Nobel Prize in Physics for graphene? Answer with the four-digit year only.
In what year did easyJet operate its first flight? 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 Juno spacecraft enter orbit around Jupiter? 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.
