Abnormal



 or Abnormals are the terms used to describe the various creatures on Sanctuary. Most of them are believed to be natural mutations, although some have been created on purpose.

History
Many abnormals have been influential to human history, although most of the world is unaware of this fact; the ancient vampire civilization was responsible for many advances in science and technology. Important historical figures such as Nikola Tesla and U.S. president Warren G. Harding were actually abnormals.