What Is a Two Headed Snake?

In the olden days, it was a thing in australia that tasmanians had two heads. The reason being that they had a problem with a deficiency of iodine. So people in tasmania would often have goiters. But actually, what would happen is they would have some surgery. And so they would have like a sar on the neck. It's not so common to be id deficient in tasMania but i do think the ones that did it, cause they are rosy, so they've got a sense of humour. A two headed rattlesnake called double dave was born 2,000 and 19 years ago. He was found by two