Is Elvis really dead? Is chocolate really addictive? How much does an eyeball weigh? These and millions of other questions and answers are found on Ask Jeeves(r) (www.askjeeves.com), one of the most popular sites on the Internet. Ask Jeeves why the Mona Lisa doesn't have eyebrows. Ask Jeeves if cockroaches would survive a nuclear holocaust. Ask Jeeves if Mel Blanc, the voice of Bugs Bunny, was really allergic to carrots. (He was.) Here are 365 of the most intriguing questions asked on the Internet and their answers-often surprising, always interesting.