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.
Being exposed to sunshine will also increase your levels of vitamin D. Hiking is a cardiovascular activity, depending on how hard you push yourself during a hike, and thus has benefits for your cardiovascular system, such as reducing the chances of heart disease, and increasing your overall fitness.
For obvious reasons a camera is really nice to bring along. Big plus if it's a digital camera! Other items: a whistle, in case you get lost or need help ; waterproof matches ; some kind of lip balm/blistex ; sunglasses ; extra batteries for that flashlight! gaiters are great if you're hiking in shorts and it's a bushy or wet trail