Misc: television the wizard of ____?

Questions

Who said , "Marriage is a wonderful invention - but so is the bicycle repair kit"?

In which athletics event would you perform a "Fosbury flop"?

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

What is the meaning of diurnal?

What does a speleologist study?