Have you ever wondered exactly how much time you have spent on Facebook over the years? A calculator from Time may be able to answer that. Time said the application searches timestamps on users' posts to find the earliest ones, and then works from there.
It says I have wasted 69 days, 44 hours, and 17 minutes of my life. Wow, I was expecting more time than my first marriage but who knew.
See how much time you've spent on Facebook at bit.ly/facebookcalc