SOME INTERESTING FACTS
WHY DO CATS PUR?
When a cat is happy and feeling affectionate, it scrapes its vocal cords to produce a purring sound.
WHY DO CROCODILES YAWN?
Perhaps they are bored waiting for their next meal ! Not at all ! They are opening their jaws as wide as they can to lose heat quickly especially when basking in the hot sun.
WHY HIPPOS YAWN?
When hippos yawn, they are really showing their teeth. They do this to threaten and frighten off male rivals.