n Roberta Horton of Concord, Calif., remembers that brothers Robert and Ted Kennedy served in the U.S. Senate at the same time (1965-68), and wondered if any other sibling pair ever did. From 1800-03, brothers Theodore (R.I.) and Dwight (Mass.) Foster were U.S. senators.

Before becoming a mega-selling author of political thrillers, what was Tom Clancy’s day job?

A) FBI agent

B) University professor

C) Commercial artist

D) Insurance broker

Tuesday’s answer: The adult giraffe has one of the shortest sleep requirements of any mammal, averaging about two hours per day.