Complex sentence: The Psychlos, hairy tall, 1,000-pound sociopaths, originate from a planet with an atmosphere very different from that of Earth, located in a parallel universe, and following slightly different physical laws, with a slightly different table of elements.
Split into simpler sentences: The Psychlos, hairy tall, 1,000-pound sociopaths, originate from a planet with an atmosphere very different from that of Earth. Their home world is in fact located in a different/parallel universe, and follows slightly different physical laws, with a slightly different table of elements.