Missing trivia? 08/05/2013

What is a silent disco?

• A disco at a private party or event where the music is transmitted through wireless headphones worn by those who are dancing or interested in tuning in, and is not heard by others in attendance.

What are cirrus clouds—the thin, wispy clouds high in the sky—composed of?

• Ice crystals.

What government building in Washington, D.C., houses a slice of Tom Thumb’s wedding cake?

• The Library of Congress. Thumb married fellow P. T. Barnum midget Lavinia Warren in 1863. The cake slice, which includes a few pieces of shriveled fruit, was found in a collection of theatrical papers acquired by the library.