Qwerty

In 1866, Christopher Sholes invented the first practical modern typewriter. On his first model, the letters on the keyboard were arranged in alphabetical order and this caused problems because the keys jammed easily when the typist worked quickly. Sholes with assistance from James Desmore rearranged the typewriter keyboard by splitting keys for letters commonly used to prevent them from sticking to each other. This arrangement became today's standard "Qwerty" keyboard.

Karl Landsteiner

Karl Landsteiner was an Austrian biologist and physician. He is noted for having first distinguished the main blood groups A, B and O, which he labeled C, of human blood. Landsteiner also found out that blood transfusion between persons with the same blood group did not lead to the destruction of blood cells, whereas this occured between persons of different blood groups. Based on his findings, in 1907 the first successful blood transfusion was performed by Reuben Ottenberg at Mount Sinai Hospital in New York.

Mount Vesuvious

On August 24 79AD, mount Vesuvious in Italy erupted destroying and burring under 4-6m of ash and pumice the city of Pompeii, along with Herculaneum and many villas in the surrounding area. An estimated 16.000 people died from the eruption.