Y Chromosomes and other manly stuff
"'Each male newborn undergoes an estimated 600 changes in DNA base pairs in an effort to overwrite any mutations....It seems that the repetitive sequences swap between the two arms of the Y, leaving a son's Y chromosome different from his father's.'" (Quoted from the Reuters story)
And last and certainly least, what could be more manly than learning Spanish swear words [Well, pinche pendejo, the diveintomark site seems to have deleted this page. Link removed 03/25/2004]? Having lived in Albuquerque, I knew most of them, but I'm always up for learning more.