Right-handed Vs Left-Handed, who lives longer! 

In a letter in the current issue of The New England Journal of Medicine, researchers who studied the deaths of 1,000 Southern Californians report that right-handers, on average, live to be 75 years old. Left-handers typically dies at age 66. 

Source:https://www.nytimes.com/1991/04/04/us/being-left-handed-may-be-dangerous-to-life-study-says.html