Blood Types Discovered
Karl Landsteiner discovered that there are four different human blood types (A, B, AB, and O). Before his discovery blood transfusions didn't work most of the time because patients would receive the wrong type of blood and they would have a bad reaction to the transfusion. If a patient had a bad transfusion it most likely ended in the patient dying. After Landsteiner discover blood types transfusions were more successful and they were able to keep more people from bleeding out.
Horse Racing Banned
Horse racing is banned in San Francisco, last race Mar 16th
55 die as Rock Island train derailed near Marshalltown, Iowa
In Bremen an assassin attempts to kill Kaiser Wilhelm II of Germany.