Art News from Around the World: • How Do You Determine Whether An Artwork Is Really A Leonardo? • Why Is The Taj Mahal Deteriorating? Smog, A Filthy River, And Massive Amounts Of Bug Poop • That Jesus Painting In The Museum Basement Turned Out To Be A $30 Million Mantegna • Demand For Nigerian Art Is Growing - Not Just In The West, But In Nigeria, Too • Top Posts From AJBlogs 05.23.18