What is formed when light is bent by layers of hot air?

More Questions:

What does Seoul, the South Korean capital mean in the Korean language?

Figure skater Elvis Stojko comes from which country?

What does "PT" stand for in the names of Navy PT boats?

Who invented the Moog synthesiser?

It is considered bad luck to mention what Shakespeare play by name while inside a theater?

Who painted "The Blue Boy"?

Which of the 7 dwarves did not speak?

Which ocean does Somalia has water access to?

What mountain is the tallest point in Ecuador?

The drug quinine was originally isolated from the bark of which tree?

Which have longer snouts - alligators or crocodiles?

Which planet was discovered in 1846?

Who has been played in a movie by both Robert Downey and Eddie Izzard?

Who was the first person to sign the Declaration of Independence?

What is the only US state that has a Spanish motto, "Oro y Plata"?