Quote:
Not really a grammar question--more of a typographical style question, in the category of technical minutiae! National Geographic uses one space after a period, although I don't know why! And we're told (in no uncertain terms) to use one space when we submit material for our website. I used two until recently, but one seems to be the standard these days, so I guess we'll both have to get used to it!

I suppose you've come across this web page, which discusses the issue ad nauseum: http://www.webword.com/reports/period.html

Personally, I prefer two spaces...because I'm afraid of change