Title: Karl Popper.
Question: What process in science is like the process of natural selection in nature?

Title: Department store.
Question: Where is the "field of distribution" most often associated with?

Title: Planck constant.
Question: What is frequency also known as in science?

Title: Dwight D. Eisenhower.
Question:
What did Khrushchev refer to the U-2 as?