Misc: Which British stage and film director won an Oscar in 2000?

Questions

Trivia : Only one modern olympic games was not named after the host city - The "Interim Olympic games" of 1906, but what city hosted it?

Trivia : What is the meaning of diurnal?

Trivia : What does a speleologist study?

Trivia : Total color blindness is medically know as what?

Trivia : Which mountain is the highest in the Alps?