Which of the main categories of cloud forms at the highest altitudes?

More Questions:

What citrus beverage has used the ad slogan "Open a Bottle of Sunshine"?

The ruby anniversary celebrates how many years of marriage?

What word describes the dominance of one state over a group of other states?

Who wrote the 1896 Science fiction novel "The Island of Doctor Moreau"?

Which detective story writer created the character Tuppence Beresford?

What type of radio had a cat's whisker?

What was neurologist's Viktor E. Frankl's middle name?

What is the chemical name for a dentist's "laughing gas"?

Kelsey Grammar sings and plays the theme song for which TV show?

What former pro athlete played Matthew McConaughey's father in the 2006 movie "Failure to Launch"?

What future Oscar-winning actress played the title role on the 1960's sitcom "Gidget"?

What comedian was nickname "Mr. Television"?

Which Edward was the first ever Prince of Wales?

What Roman god is January named for?

Born in 1962, who in the world of music has the real name Stanley Kirk Burrell?