This clip from Mysteries of Mutation on Discovery Channel describes a specific type of conjoined twins. Cephalothoracoiliopagus twins, means they are connected throughout the body.
The Vrolik Museum in Amsterdam has the largest collection of human mutants. We learn more in this clip from Mysteries of Mutation on Discovery Channel.
This clip from Mysteries of Mutation on Discovery Channel discusses the effects of the Sonic Hedgehog protein that causes the body to grow additional body parts such as a pig with two noses.
This clip from Mysteries of Mutation on Discovery Channel discusses the Fibrodysplasia Ossificans Progressiva (FOP) disorder where human tissues turn in to bone.
This clip from Mysteries of Mutation on Discovery Channel describes the condition "Arnold Syndrome" and how this bone mutation affects different individuals.
On Discovery Channel's "Human Mutants the meaning of Beauty," The color of people's skin is determined by pigments that are found under the skin. However if these pigments malfunction skin disorders are likely to occur.