When is the optical phenomenon called a "green flash" or "green ray" visible?

More Questions:

How many signs are there in the Zodiac?

Founded in 1924, what department store’s name includes the street of its original New York City address?

What famous street follows the line of a twelve-foot stockade begun in 1653 by Peter Stuyvesant?

What river separates New Hampshire and Vermont?

Who was the first African American to host a TV show?

What was in the jaws of the swordfish mounted on the wall in the Addams Family house?

Who co-wrote and directed the 1974 movie "Blazing Saddles"?

Who was the first victim of the electric chair?

The USS Arizona Memorial commemorates the victims of what event?

The "Indus Valley Civilization" is also known by what other name?

Albert Einstein was offered the position of prime minister of what country?

Which UN Secretary-General was killed in an airplane crash in 1961?

What nation has had its own scandals dubbed "Muldergate" and "Inkathagate"?

What is dendrochronology?

What English singer-songwriter was born on December 25, 1971?