You're stranded on a boat at sea, no substantial food or water for days, living off collected rain and already having lustily consumed the leather brim of your hat. That's when you realize there's a huge chunk of meat sitting right next to you.
Blackberries, raspberries and cranberries are all found in the wild, but you'd better be sure you've got the right berry before you eat one off the vine. There are plenty of berries in the woods that could kill you.
You may associate smoke signals with Native Americans in old Westerns, but they aren't totally a thing of the past. Find out why the Boy Scouts still teach kids how to make them -- and how you can send some yourself.
The chance that you'll be shipwrecked on a deserted island and have to start a fire is slim. But let's imagine that you're lost somewhere and it's getting dark and you don't have any matches. What do you do now?