Misc: An elephant can be pregnant for up to how many years?

Questions

Trivia : Who said 'The greater our knowledge increases, the more our ignorance unfolds'?

Trivia : Who said 'The way of the warrior is the resolute acceptance of death'?

Trivia : Who said the line "Dr Livingstone, I presume!"?

Trivia : Who took the title "Lord Protector of the Commonwelth of England, Scotland, and Ireland"?

Trivia : Who was America named after?