Perhaps the greatest medicine ever invented is aspirin. You will learn how to make your aspirin in the wilderness. Everything you need to survive is provided by nature, often in quantities so vast they may appear inexhaustible. But unless you are skilled in wilderness survival you may not know how to identify and put to use the bounty nature provides. You may fall prey to hunger, thirst, injury, disease, cold, or a host of other threats when everything you need to survive is close.