Title: Slavs.
Question: When did Rebaa and colleagues studied several Slavic populations with the aim of localizing the Proto-Slavic homeland?

Title: New Delhi.
Question: What organization ranked New Delhi 39th in economic activity in 2011?

Title: Sexual orientation.
Question: Why does psychiatrist Anil Aggrawal say androphilia and gynephilia are needed terms?

Title: High-definition television.
Question:
SD television fractional rates were often rounded to what?