The detail:
Wishing you a somber Earth Day, 2010. We have met the Galactus, and he is us.
***
Source: "Fantastic Four" #49, 1966
Source: "Fantastic Four" #24, but we scanned it from a reprint circa 1970.
*
Source: Originally from "Fantastic Four" #13, 1963. Scanned from "Marvel Collectors' Item Classics" #7, 1967
Source: A small 1970s paperback. Sorry!
*
*
Note: We posted a found Web image of this a while ago, but when we located our own copy, we had to get closer. The original was in FF Annual #3. Our scan is from a later FF Annual, in which it was reprinted.
*
Source: We've lost track of where we scanned these, but both are from reprints of early FF issues.