cattime.com

oBknR TIL felines who purr cannot roar. It comes down to a bone called the hyoid which is not completely ossified in roaring cats while it is in domestic cats.
wLEDW TIL: Cats can drink seawater without becoming dehydrated where most animals (including humans) would die of dehydration
neX9W TIL that each cat species can either purr or roar, but no species can do both.