Furthermore, research indicates that the slow creeping flow of hot buoyant rocks — moving several centimeters per year — carries heat away from the core to the surface, resulting in a very gradual cooling of the core over geological time. (sciencedaily.com)
Scientists comparing radar images from the Cassini spacecraft with geophysical models say that the three ridges in this image, released yesterday, were created when Titan's gradual cooling after its formation caused partial freezing of the moon's subsurface ocean of water and ammonia. (sciencemag.org)
The reconstruction shows warming as we exit the last ice age, followed by a stable temperature plateau, followed by about 5000 years of gradual cooling ending around the beginning of the last century. (planet3.org)