http://www.time.com/time/magazine/article/0,9171,1673284-1,00.html
This is an article written in Time Magazine that describes many studies that essentially say that there is strong statistical evidence that your birth order(first, middle, last) has a strong correlation with various personality and physical traits.
First borns are more likely to be bigger, have a higher IQ, and have a better paying job.
Last borns are much more likely to be risk takers, be funnier, and make less money.
I didn't look through any of their sources, but this hits home with me since my family has 2 older brothers who are both pretty successful, and a younger one who just got suspended from college for partying too much, who is also really funny.
Just thought it was an interesting article to share, and wondered if you all had any thoughts.
James