Scientists have genetically engineered a mouse with a human ear in an attempt to develop human body parts in a lab.
Spider goats have been created by combining spider DNA with goat DNA to produce milk that contains spider silk proteins.
Featherless chickens have been genetically engineered to eliminate the need for plucking feathers for consumption.
Ligers, a combination of lions and tigers, are the largest of all big cats and possess characteristics of both species.
Human pig hybrids have been created to grow human organs inside animals for potential use in transplants.