Even if you don't know who Jack Kirby is, you'll know his creations. The New York comic book artist created Captain America with Joe Simon during the second world war and, with fellow comics legend, writer Stan Lee, classic characters such as the Fantastic Four and the X-Men for Marvel Comics during what's known as the silver age of comics in the 60s.
Kirby left Marvel Comics for DC in 1970, but when he returned in 1975, it was with a series called The Eternals, which charts the battles between the godlike alien giants called the Celestials and mutant superhumans, the Deviants. If you're a comics fan, or a Neil Gaiman fan, you might be familiar with the more recent graphic novel version of The Eternals, but Kirby's original is in a different league - and I don't mean justice - with adventures that take in explaining the history of space gods to a college anthropology class, a Borg-like collective creation known as the Uni-Mind and a cosmically-powered robot called Hulk.
Kirby had always been great on fantasy and sci-fi stories, working on anthologies like House Of Mystery, Strange Tales and World Of Fantasy, but when it came to The Eternals, there was more than a passing sense of fitting in with the Erich Von Daniken times. As the editorial to the first issue shows, it seems like Kirby did actually believe that space gods probably had at some point "stumbled upon this boondock planet called Earth." And that maybe they might come back. Now that really is belief in your work.