Title: Gramophone record.
Question: What are common diameters found in phonograph records?

Title: Hydrogen.
Question: What are the only two names still used for radioactive isotopes?

Title: Hellenistic period.
Question: Who rejected Academic Skepticism in favor of Neoplatonism?

Title: Spectre (2015 film).
Question:
Which film grossed more money for its opening weekend in the North American market, Skyfall or Spectre?