The extraction process to remove the lead from the sulfur is very simple, thus lead has been extracted from Galena since the earliest times.Galena from certain regions is rich in silver, and some specimens may contain as much as 20 percent silver. Because of this, silver-rich Galena is also an ore of silver.
Research shows that hiking has a positive impact on combating the symptoms of stress and anxiety, says Gregory A. Miller, PhD, president of the American Hiking Society. Being in nature is ingrained in our DNA, and we sometimes forget that.
If road bikes are sleek track shoes, mountain bikes are comfy hiking boots. This makes mountain bikes useful for variable urban terrain as well as off-road riding. Mountain bikes are generally more comfortable than road bikes, but this is relative to the type and duration of riding.