Kal-El was born on the doomed planet Krypton. He was sent to Earth, where his rocket landed in the ocean and attracted the attention of both U.S. and Soviet military. However, a U.S. sailor, Lieutenant Thomas Clark, reached the rocket first and it was brought to the U.S.
Kal-El shocked the staff on the military base, when he emerged from the ship and displayed his powers. The general in charge, Kent Garrett, dubbed the lad "Skyboy" and had a costume made for him.
In the early 1990s, a third world power had emerged and plotted to start a war between the other two. Skyboy was able to prevent it, but seemingly at the cost of his own life and that of General Garrett. In truth, Skyboy had survived. He threw his costume into the ocean and assumed the alias "Clark Kent" (after the general and the sailor, who had claimed his ship for the U.S.), starting a career as a reporter.
At the dawn of the 21st century, the third world power once again plotted against the rest of the world. They had built an android called "Moka", who took credit for Skyboy's rescue of the world in the 90's and now demanded control of the world. Feeling he had no other option, Clark dove into the ocean and picked up his old costume. He confronted Moka and defeated him, before disappearing again and returned to his regular life as Clark Kent.
- 2 Appearances of Kal-El (Earth-300)
- 4 Images featuring Kal-El (Earth-300)
- Quotations by or about Kal-El (Earth-300)
- Character Gallery: Kal-El (Earth-300)