Correct answer: six-iron.
On Apollo 14 in 1971, Shepard fixed a Wilson six-iron head to a sample-collecting tool and hit two golf balls across the lunar surface.
Correct answer: a Swedish mining village.
Yttrium, ytterbium, terbium, and erbium all take their names from Ytterby, a village near Stockholm whose mine yielded their ores.
Correct answer: lime Jell-O.
A bowl of lime Jell-O wired to an electroencephalograph traced waveforms resembling brain activity, showing how easily the machine registers stray signals.
Correct answer: Johannes Kepler.
Kepler showed that the eye's lens casts an inverted image onto the retina, locating where sight actually begins.
Correct answer: Francis Bacon.
Bacon reportedly fell ill in 1626 after the experiment and died soon afterward -- an early brush with the idea of refrigeration.
Correct answer: Archimedes.
Archimedes asked for a sphere and cylinder on his gravestone to mark his proof that a sphere is exactly two-thirds of its enclosing cylinder in both volume and surface area; Cicero found the overgrown tomb near Syracuse around 75 BC.
Correct answer: N.
The N mark was allotted to the United States in the 1919 Paris convention's radio-style letter split — which is why American pilots still call a registration an "N-number" — and early marks carried a class letter too, like NC for commercial aircraft. See the full list of aircraft registration prefixes by country.
Correct answer: Stendhal syndrome.
Stendhal syndrome is named for the French writer Stendhal, who described feeling overwhelmed by the art of Florence in 1817.
Correct answer: insecticide.
The pressurized insecticide canisters were developed to protect troops in the Pacific from mosquitoes and other disease-carrying insects.
Correct answer: Isaac Newton.
Einstein, Bohr, and Fermi each have an element -- einsteinium, bohrium, and fermium -- but Newton, for all his fame, has none.
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