On This Day: 06 April 1973 Pioneer 11 launched toward Jupiter & ---------- ?

Questions

Which middle eastern country's official name is Al-Lubnan?

What name is given to the socket in the skull which holds the eye?

New Zealand's National Day, the 6th February, is named after a Treaty of 1840. What is the day called?

Which garden plant has varieties called Nelly Moser and Hagley Hybrid?

In literature, what was Long John Silver's status when on board ship?