Misc: In which game do players try to reduce their score to zero?

Questions

what's the world largest basilica?

what is the name for a limestone deposit hanging from the roof of a cave?

"my cherie amor" by?

"domo origoto mr. roboto" sang this group in 1983 on their "kilroy was here" album?

although you can't tell from the title, bobby hebb actually was singing this one to his brother in 1966?