Which comet returns to the inner Solar System about every 75 to 76 years? Answer with the name only.
Earth's inner core is solid. Answer true or false.
In what year did Einstein present the field equations of general relativity? Answer with the four-digit year only.
Whose 1929 observations showed that galaxies recede at speeds proportional to their distance? Answer with the surname only.
Which era followed the Mesozoic? Answer with the era name only.
What is the largest organ of the human body overall? Answer with the organ name only, in lowercase.
Avogadro's constant is about 6.022 times 10 to what power per mole? Answer with the whole number only.
Which moon of Saturn has a thick nitrogen-rich atmosphere? Answer with the moon's name only.
In what year did the first controlled nuclear chain reaction, Chicago Pile-1, take place? Answer with the four-digit year only.
In what year did Mount St. Helens erupt catastrophically? Answer with the four-digit year only.
In what year was the first image of a black hole (M87*) released by the Event Horizon Telescope? Answer with the four-digit year only.
Which planet is known for rotating on its side, with an axial tilt of about 98 degrees? Answer with the planet name only.
Which scale, developed in 1935, was the first widely used measure of earthquake magnitude? Answer with the scale's surname only.
In what year was the element tennessine officially named by IUPAC? Answer with the four-digit year only.
In what year was the James Webb Space Telescope launched? Answer with the four-digit year only.
What is the largest living species of animal? Answer with the common name only, in lowercase.
What is the ISO 4217 currency code of the Swiss franc? Answer with the three-letter code only.
