In the Middle Ages, as alchemy spread in Europe, when Persian writings were translated by monks, the small groups of leisurely men interested in alchemy started to print their theories and beliefs using the newly invented printing presses. The Church tried to police it. Darker science publications were burnt, especially when ceremonial invocation of spirits was involved, but theories linked to results of scientific studies based on experiments were allowed to circulate. However, the sorcery, when covered by experimentation, was allowed to circulate too. So sciences today still have a dark core of animal experimentation (the sacrifice), weaponisation, medical and eternal life potions and ambitions to discover dark secrets of how create animal life from plants or inanimate matter (the homunculus and golem) and mixing of completely different species (the chimera).
