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.
Some physical benefits of an exercise 1  : easy to use. 2  convenient. 3  home use. 4  ideal for people not used to exercising or very overweight people. 5  ideal if bad weather doesn't allow outside activities. 6  watch TV during a workout. 7  low injury risk to knees and ankles. 8  easy to develop a rhythmic pace for better fat burning.