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.
Few activities beat the body benefits of hiking; you're slipping cardio into your day and burning up to 530 calories per hour on the trail. And in gusty weather, the wind resistance can boost your burn potential by about 5 percent, experts say. It's a terrific total-body workout.