21. Of course, none of our adventurers volunteer for the trip out of a sense of excitement. Teela goes because she's fallen in love with Louis, and he's going. Nessus offers Louis and Speaker an unspeakably valuable prize for their service. What is it?
From Quiz Larry Niven's "Ringworld"
Answer:
An innovative ship that takes only 1 minute and 15 seconds to travel an entire light year
"If my mission is successful," Nessus tells Louis, "I plan to turn the ship over to my crew, with blueprints with which to build more. The ship, then, is your ... fee, salary, what have you." This prize is more than just useful, however: it's vital to the survival of their species. Ten thousand years previously, a star in the dense core of the Milky Way galaxy had gone nova, setting off a chain reaction -- "the Core explosion." In another twenty thousand years, the radiation from this cataclysmic event will reach known space and destroy every biological organism in its path. Ever try to evacuate tens of trillions of sentient beings to another galaxy? Louis and Speaker know that their species need the fastest, best ships they can get.