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.
It can take beginners a bit of practice to get used to clipless mountain bike pedals, but there are some advantages: Improved pedal efficiency, as energy is transferred throughout the pedal stroke. Improved handling on technical rides. Clipless pedals keep your feet attached to the bike on bumpy descents and make things like bunny-hopping much easier.