Title: Geological history of Earth.
Question: In what type of sea did typical Proterozoic geology come to be?

Title: Copyright infringement.
Question: Whose copyright were news aggregators infringing on?

Title: Daylight saving time.
Question: What kind of societies usually follow a regular daily schedule year-round?

Title: To Kill a Mockingbird.
Question:
What movement in the '60s did the novel help spark?