Double Your Pleasure, Double Your Fun With The Incredible Edible Egg [VIDEO]

So I'm a fan of eggs, I eat them on occasion.  I like them scrambled, fried, boiled, deviled, etc.  I grew up on fresh eggs right off the farm (man, I miss those days).  I have always been amazed when I crack one open to find a double yolk.  I consider that good luck.  However, can you imagine cracking open a egg only to find another egg. Apparently, in China there is a chicken who lays giant eggs that have an egg inside them.

My first thought, is this chicken genetically engineered?  Is it just an amazing coincidence and a miracle of sort?  If this chicken can lay this "super" egg, is there a goose that lays a golden egg?