The "pinna" is the outer, visible part of what?

More Questions:

What is the fear of one's own fears known as?

What does a chrome-dome have a shortage of?

Which racing team introduced a six-wheeled race car in 1974 and began racing it in 1976?

On which racecourse in County Kildare are the 5 Irish Classics run?

The Black Hills, home to Mount Rushmore, are located in which US state?

How many equal sides are there on a scalene triangle?

How deep is a fathom?

What vitamin's principal form is ascorbic acid?

Other than the bald eagle, what is the only species of eagle found in the US?

Who did Ed Wood meet in the movie by the same name?

In the TV show "The Simpsons', who is Chief Wiggum's wife?

Who is the only American-born member of Monty Python?

What was John Ritter’s character’s name in the TV show "Three’s Company"?

In what year was the Declaration of Independence adopted?

Which British Prime Minister died in 1965?