February 17, 1904: Madama Butterfly premieres. On 17 February 1904, Puccini's opera Madama Butterfly premiered at La Scala in Milan, Italy. The story is set in Nagasaki, Japan. The first night went badly, but after Puccini revised it, it became one of the most loved operas in the world.
1740 🔬 Swiss scientist Horace-Bénédict de Saussure was born; he offered a prize to the first climbers of Mont Blanc and later climbed it himself to study the air.
1781 💡 French doctor René Laennec was born; he invented the stethoscope, first just a rolled-up tube of paper, to listen to patients' hearts.
1959 🚀 Vanguard 2, the first weather satellite, was launched to measure how much cloud covered the Earth from space.