In reptiles and birds it works the other way. Instead of Xs and Ys they have Ws and Zs and if you get two Ws you a male and a WZ is a female. Or something. I read that somewhere and I have no source. But I wonder how it was that mammals evolved to the reverse system?
Hey Janez!
Very important question - do you have some dirtbag living quarters? Couch, spare bedroom, dry spot on the floor? Youve been in the Mile0, you know what the requirements are You just might have a couple of friends visting after Christmas
Celebrate human ingenuity - buy cubic zirconium "brighter and more brilliant than the real thing" (although it only scores a 9 on the Moh's hardness scale )
American chocolate bars are among the world's worst. One sign of this is the way Americans call them "Candy bars" as if recognizing there is nothing that can truly be called chocolate in them.
{this is my entry in this weeks Post Like Catbirdseat contest)