Portrait trivia: Is it true that the Mona Lisa portrait has no eyebrows?

Everyone knows that Leonardo da Vinci is a world-famous painter, and “Mona Lisa” is Da Vinci’s masterpiece. Among…
Money trivia:Why most of the banknotes are frontal portraits, while coins are side

Money trivia:Why most of the banknotes are frontal portraits, while coins are side

As we all know, the fineness and complexity of the frontal portraits are able to prevent counterfeit banknotes…