holy cow!!

[panther]

Dairy workers were left stunned after a rare new breed of cow was born - Blinky the two-headed calf, they call her that because all four eyes blink at the same time!!The Holstein heifer has one neck and two ears, but she also has four eyes, two noses and two mouths.
but the poor mite cant stand up, because she as a deformity of the brain

 

[panther]

a dog with two noses as well

 

[jackyalex]

ow thats strange,there is a 2 headed calf in my local museum (stuffed),and it has extra legs sticking out of its back,i dont think it will survive for long if it cant stand

 

[MargaretR]

Mutations occur naturally and unnaturally (eg radiation)
For some heavy reading on the subject - look here
SCIENCE VS EVOLUTION 10b