I haven't any Superman fanfiction. I write multi-crossover stuff in a Marvel-based universe.

In these, Clark Kent is an alien who arrived on Earth as a teenager, one of many sent from a dying planet and aimed at a similar world. Clarks' was driven off-course and crashed on Earth, where he was found by the Kents and looked after as best they could until UNIT turned up. Under the direction of a Scientific Advisor known as The Doctor, Clark was 'adjusted' to be able to live among humans.

Because his homeword was heavy-grav, Clark is not very tall, but he is stocky. His skeleton and muscles are very dense and robust, making him strong and fast, like Spider-Man. He needed cochlear implants and surgery to his vocal folds to allow him to hear and speak properly in Earths' atmosphere. He has both gills and lungs because the atmosphere he evolved for was very dense and occasionally liquid. Since he was adapted for a red sun, he can see into the infra-red, but is colour-blind to anything above green in our spectrum. He needs dark glasses in daylight, but can see well in the dark. Finally, his own skin simply peels off under our sun's ultra-violet light, so he had to have it replaced with a synthetic one. Becuase he can breathe as comfortably under water as he can in air, he enlisted in the US Navy and eventually became a SEAL, before joining SHIELD, where he is now assigned to the Special Operations team led by Draco Malfoy.

If after all that, you're still interested, my stories are on FanFiction.net, my author name is Argonaut57 and the stories concerned are "Professor Iye" and 'From Durmstrang With Blood". There's a tom of other stuff on there, help yourself!