All three of those scales are really very similar; they have the same foundation. The blues scale is a variation of the pentatonic in that it has all the same notes but throws in a diminished 5th (the note between the 4 of 5 of the scale), and aeolian contains the same notes as the pentatonic and adds the 2nd and 6th degrees of the scale.

Let me know if this is too confusing, I have trouble explaining these things sometimes.