Karl Landsteiner, discoverer of blood groups, honored in Google Doodle
When you're in need of a blood transfusion, you'll be given blood that matches the blood your own body produces. But this wasn't always the case. The reason we know about it is because of an Austrian and American biologist by the name of Karl Landsteiner, who discovered the blood groups in 1901.
Landsteiner, who died in June 1943, would have been 148 years old on June 14.