20 Lesser-Known Facts About Animals That Are Utterly Adorable

Despite their size, cheetahs can't roar – so they purr and chirp instead. The bones of the cheetah's voice box form a fixed structure, with divided vocal cords that vibrate with both in and out breaths. This structure is the same for all the 'small' cats. While this design enables these cats to purr continuously, it limits the range of other sounds and prevents them from being able to roar.