I live on the coast of the northeastern part of Brazil (Rio Grande do Norte). As you go inland, the terrain becomes very arid. There are cactus and a lot of xerophilic plants that remind me a lot of ...
I've been working with the bow-drill, and I notice that certain types of wood may be so hard that hardly any powder forms (like african mahogany) and others may be too soft and crumbly. Pine appears ...