1.What do you know about the fundamentalist movement?

Fundamentalist movement is a militantly conservative and fanatically religious American Protestant movement that began in the early 20th century in opposition to modern scientific tendency; it holds that the Bible is a verbally accurate recording of the word of God, and was strong in parts of the U.S, especially the South, at the time.

2.How do you understand the sentence “DARWIN IS RIGHT-INSIDE”?

This is a pun. The author plays on the different meanings of the words: “Darwin “and "right” “Darwin “can refer to the English naturalist or to the shop owner, while "right “can mean correct or directly. So when one pauses before the dash, the sign means Darwin (the naturalist) is correct; when you read out the whole sign in a breath, it means the shop owner is directly inside.