What is the hardest substance in the human body? Answer with the single word only, in lowercase.
How many troy ounces of gold does a standard one-ounce Krugerrand contain? Answer with the whole number only.
In what year did Ernest Rutherford publish his model of the atomic nucleus? Answer with the four-digit year only.
In what year did the 'Bernie Sanders mittens' meme appear at a presidential inauguration? Answer with the four-digit year only.
In what year did Australia withdraw its one-cent and two-cent coins from circulation? Answer with the four-digit year only.
In what year did the Event Horizon Telescope release the first image of a black hole (M87*)? Answer with the four-digit year only.
Which country is the comedy duo Ylvis, of 'What Does the Fox Say?', from? Answer with the country name only.
In what year was the Jefferson nickel first issued? Answer with the four-digit year only.
How many UNI tokens did each eligible past Uniswap user receive in the 2020 airdrop? Answer with the whole number only.
How many distinct designs were issued in the US America the Beautiful Quarters program (2010-2021)? Answer with the whole number only.
In what year was the Binance exchange founded? Answer with the four-digit year only.
In what year did the first Bitcoin ATM open, in Vancouver? Answer with the four-digit year only.
What animal appears on the classical Athenian silver tetradrachm? Answer with the single word only, in lowercase.
Which US city is home to the original United States Mint founded in 1792? Answer with the city name only.
In what year was the 'Double Rainbow' video posted to YouTube? Answer with the four-digit year only.
Who founded the Binance exchange? Answer with the surname only.
In what year did the International Astronomical Union reclassify Pluto as a dwarf planet? Answer with the four-digit year only.
Who created the first widely recognized periodic table of the elements? Answer with the surname only.
Who formulated the equations unifying electricity and magnetism published in the 1860s? Answer with the surname only.
How many bitcoins did Laszlo Hanyecz pay for two pizzas in 2010? Answer with the whole number only.
Which sculptor designed the Buffalo nickel first issued in 1913? Answer with the surname only.
