"Unusual Tales", a series presenting Steve Ditko's comics from 1957 to 1959 that are in the public domain.
Yeah, I know! Where did that come from? Anyway, the science is questionable, but the story is good, and the art is nothing short of spectacular. In the top tier of Ditko's 1950s work, just look at those scenes of nuclear destruction in progress, and the aftermath. Through in some dinosaurs and a descent into barbarism and you've got a classic.
The great cities on the surface became maimed and battered skeletons, reaching crippled fingers of steel to the dreadful sky as if in supplication
Some links to check out:
Buy Ditko's creator-owned work
Find out about the fanzine DITKOMANIA
Check out new and upcoming Ditko publications
Download public domain comics, likely including the one this story is from
(scans in this series generally adapted to my personal tastes from those copies)
Click images to big-up.