According to the Left-Handers Club:

• Left-handed persons are called sinistral.
• Most left-handers draw figures facing to the right.
• There is a high tendency in twins for one to be left-handed.
• Research from the US National Bureau of Economic Research suggests that among graduates the earning power of left-handed men is 15% greater than that of men who are right-handed.
• Stuttering and dyslexia occur more often in left-handers (particularly if they are forced to change their writing hand as a child).
• 4 out of the last 6 presidents have been left-handed (Ford, Reagan, H.W. Bush, Clinton).
• Left-handers adjust more readily to seeing underwater.
• Left-handers usually reach puberty 4 to 5 months after right-handers.
• 4 of the 5 original designers of the Macintosh computer were left-handed.
• 1 in 4 Apollo astronauts were left-handed - 250% more than the normal level.
• Left-Hander’s Day is August 13th.