Kronans are an ancient race of rock-like humanoid beings.
One Kronan warrior was a member of the Marauders, and was present during the battle against the Asgardians on Vanaheim in 2013. The Marauder attempted to duel Thor, but was destroyed with a single uppercut.
Korg, a Kronan, was punished to be a gladiator for Grandmaster for the Contest of Champions. After his acquaintance with Thor, Krog led a rebellion against Grandmaster and escaped the planet of Sakaar to join the Asgardians on their quest to Earth.
- In the comics, the Kronans are also known as the Stone Men from Saturn, although they are native to the planet Ria. They were introduced in Journey into Mystery #83, the same issue that introduced Thor.