Art of Heart ∈ 思考 69 空想 ∋ Word of World 歴史暦：古今東西 ０３／３１ 今日の出來事 Today, on March 31st, In 1596 René Descartes 159650 was born, In 1685 Johann Sebastian Bach 168550 was born, It is the day that Isaac Newton 164227 died i…