translation.en: So the ball leaves a little thermal shadow, and the beetle climbs on top of the ball and wipes its face, and all the time it's trying to cool itself down, we think, and avoid the hot sand that it's walking across.
translation.zh: 粪球提供了一个降温场所， 我们认为蜣螂之所以爬上粪球， 擦自己的脸是为了让自己凉快一些， 并把前进过程中沾上的热沙去掉。