"Xenozoic Tales" (also known as "Cadillacs & Dinosaurs") is an alternative comic book by Mark Schultz set in a post-apocalyptic future starring mechanic Jack Tenrec and scientist Hannah Dundee. Earth has been ravaged by pollution and natural disasters and humanity survived by building vast underground cities. Some 600 years later, mankind emerged to find that the world had been reclaimed by previously extinct lifeforms (most spectacularly, dinosaurs). In the new 'Xenozoic' era, technology is extremely limited and those with mechanical skills command a great deal of respect and influence.