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Mountain climbing is one of the most difficult sports, but it can be very rewarding. Trace is here today to discuss all of the aspects of climbing. Read More: Into Thin Air: Mountain Climbing Kills Brain Cells http://www.scientificamerican.com/article/brain-cells-into-thin-air/ “IN THE LATE 1890s in a laboratory atop a 4,554-meter peak in the Monta Rosa range in the Italian Alps, physiologist Angelo Mosso made the first direct observations of the effects of high altitude on the human brain: by eye and with an apparatus he designed, Mosso peeked into the skull of a man whose brain had been partly exposed in an accident, observing changes in swelling and pulsation.” Mountain climbing without the headaches caused by altitude http://medicalxpress.com/news/2014-04-mountain-climbing-headaches-altitude.html “By monitoring blood flow in the brains of six climbers scaling Mount Kilimanjaro in Tanzania, German medical researchers have identified a possible way to prevent the headaches that are a common feature of altitude sickness.” Rock Climbing, Fat Fingers and Arthritis http://scienceblogs.com/webeasties/2013/01/22/rock-climbing-fat-fingers-and-arthritis/ “In any physical activity, there is always the risk of acute injury – cuts, scrapes, bruises, and even broken bones are often par for the course.” What Are Calluses And How Are They Formed? http://indianapublicmedia.org/amomentofscience/calluses/ “These extra-tough patches of skin are generally quite useful–we might even say handy–because they act like a kind of natural armor, protecting areas of skin that get an unusual amount of wear and tear.” Your thumb and fingers don’t have ANY muscles http://www.omgfacts.com/Science/Your-thumb-and-fingers-dont-have-ANY-mus/51215 “Our fingers themselves do not have muscles in them.” Muscles of the Wrist and Fingers http://www.castonline.ilstu.edu/Thomas/181/Muscles%20of%20the%20Wrist%20and%20fingers%20DT.pdf Don’t Look Down! http://www.psychologytoday.com/blog/darwins-subterranean-world/201311/dont-look-down “Why are people scared of high roller coasters, air travel, and walking on the edges of cliffs?” Fear of Heights: Do you have acrophobia? http://www.planet-science.com/categories/over-11s/human-body/2011/02/fear-of-heights.aspx “Are you afraid of heights? Watch this video and see what you think (but remember - don't try this at home - even if you have access to a 1000 foot tall tower!)” Evolutionary psychology explores ancient and newer roots of instinctual fears http://www.washingtonpost.com/wp-dyn/content/article/2010/10/25/AR2010102503433.html “Cars kill a lot more people than spiders, bats, snakes and wolves, but why don't we fear them in the same visceral way?” Watch More: Evolution of Hands & Feet https://www.youtube.com/watch?v=8d7tNQokuns TestTube Wild Card http://testtube.com/dnews/dnews-333-why-are-we-ticklish?utm_source=YT&utm_medium=DNews&utm_campaign=DNWC Why Is There Air? https://www.youtube.com/watch?v=ocsV1cA4K4A ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Tara Long on Twitter https://twitter.com/TaraLongest Laci Green on Twitter http://twitter.com/gogreen18 DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq