If survivors have sunlight and a magnifying lens, a fire can be started with very little physical effort. Concentrate the rays of the S...

 Below-ground Desert Shelter A below-ground shelter can reduce the midday heat as much as 30 to 40 degrees F. However, building...

Charcoal from your campsite wood fire can be used to treat bad stomach aches as a result of eating something that may be poisonous or f...