Paracelsus was an alchemist and physician in the 1500’s that was credited for his earliest works in toxicology and psychotherapy.

He was also the first person ever to mention the unconscious in a clinical manner. However, his most bizarre work lies in creating a ‘homunculus’ – basically a miniature human that is supposedly created by transplanting a human egg into a horses womb and then feeding it human blood.
Not surprisingly, there is no record indicating a successful outcome to his experiments.