Title: Karl Popper.
Question: Although he opposed organized religion, what attitude did Popper think should be taken toward it:

Title: Switzerland.
Question: Where do clouds lose most of their content before getting to the inner alpine valleys?

Title: Norfolk Island.
Question: What is one reason that has caused many of the birds of Norfolk Island to become extinct?

Title: Elevator.
Question:
How were most elevators built before 1939 powered?