Yahoo News Sites

I was wondering - why would Yahoo have many different news sites. The other night I was trying to check basketball scores - usually I just go to sports.yahoo.com. This time however I clicked on News link from Yahoo Homepage. On the news site, I found the Sports section - but as I clicked on it - i was taken to a Sports section of the news site - as oppose to sports.yahoo.com. The content was very different.

So we got:

sports.yahoo.com vs news.yahoo.com/sports
finance.yahoo.com vs news.yahoo.com/biz
my.yahoo.com vs news.yahoo.com vs www.yahoo.com

Go figure...