Title: Age of Enlightenment.
Question: Who criticized the sciences for distancing man from nature and not operating to make people happier?

Title: Neptune.
Question: When was Neptune first observed?

Title: Nigeria.
Question: When did Nigeria become a British protectorate?

Title: LaserDisc.
Question:
Did all AV receivers carry the demodulator circuits necessary for LaserDiscs, or only high-end models?