He is much like Spock, but instead of having a human mother and alien father, he is a human with a symbiote in his stomach, kind of like the Trill in NextGen and DS9, but juveniles are incubated in the abdomen. When they reach maturity they burrow to the brain stem and take over the host. They are called the Goa'uld and are the bad guys [Egyptian gods] from the movie where Kurt Russell portrayed Colonel O'Neil, not to be confused with Richard Dean Anderson's Colonel O'Neill:
They made fun of their misspelling multiple times throughout the show.
Somehow his equivalent in Stargate: Atlantis was Ronon Dex a human from another planet that is inexplicably stronger, faster, and more resilient than other humans.
It turned out that he had some connection to Conan, Declan Harp, Aquaman, and some relatively big guy in Game of Thorns.
Teal'c was as smart as anyone on his team, but Ronon didn't demonstrate any of that.
His teammates called him "Chewy."