-
To discover the fire, they managed to transform the materials to make them increasingly
strong and durable. -
In this period the humans, discover the fight and they use it to
cook his meat and to protect hem of the dangeurous animals. -
Alchemy is based on the search for the philosopher's stone and eternal life.
-
It is based on the time when they began to use drugs made from plant extracts.
-
invisible substance that supposedly existed in all material things and explaining its combustion, before the discovery of oxygen.
