Leonard0 - 9:23 pm on Oct 28, 2009 (gmt 0)
Just over six years ago I was just about to give up and let my sites molder when I discovered AdSense. At first it was earning me just a few hundred a month but after a bit of time and tweaking I was making enough to live on - not as much as the OP (astrobiology must be a great niche) but it has kept me going.
There must be many other publishers who have also had good results but it is the negative experiences we hear most about.
IMO AdSense has been a major influence on forming the Web into what it is today (the good and the bad). Without it the Web wouldn't have grown nearly as much as it has.
Here's to another 6 years (at least)