During the Viking Lander missions to Mars in the 1970s, NASA began using the time increment "sol" as the equivalent of a Martian "day," because a day on Mars lasts 24 hours, 39 minutes and 35.244 seconds — about 3 percent longer than a day on Earth. Timekeeping for a NASA mission to Mars typically begins at Sol 0 when a spacecraft touches down on Martian soil. Curiosity Rover has been rolling around the surface of the Red Planet since 10:32 p.m. PDT on Aug. 5, 2012, more than 3,850 sols ago.

Curiosity Rover touched down on Mars at a landing site named for whom?

A) Neil Armstrong

B) Ray Bradbury

C) Nicolas Copernicus

D) John F. Kennedy

Previous answer: Lexiko was the original name of Scrabble.

TRIVIA FANS: Leslie Elman is the author of "Weird But True: 200 Astounding, Outrageous and Totally Off the Wall Facts." Contact her at triviabitsleslie@gmail.com.