Phytotherapy is the first form of medicine applied by people and instinctively by animals. Archaeological research has placed phytotherapy in the last ice age with evidence of its existence found to be more than 12000 years old. In ethnobotany, it is believed that the similarities of the use of the various kinds of birch and other medicinal plants from traditional phytotherapy in North America, Siberia and Russia are a result of the common ancestry of the finn-hungarian, turk, mongol and indian from the area of Northern Asia during the last ice age. Specifically, we’re talking about the use of birch to lower fever and tackle illnesses in the kidneys, the urine bladder, the breathing canal and the skin. These applications either result from common ancestry, or, unlikely, every one of those ancestries developed the same techniques.