The Titanic leaves for England. The first television transmission may not be great TV, but it's a start. A proposal is submitted to build the first computer. Madam Curie isolates pure radium. The car is souped up.
Computers make a great leap.
King George is crowned, and the world listens. The day of Trinity. The letter that began the atomic age. The Nautilus goes under the North Pole. The bombing of Hiroshima.