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The Deepest Hole in the World, And What We've Learned From It
 
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SciShow takes you down the deepest hole in the world -- Russia's Kola Superdeep Borehole -- explaining who dug it and why, and what we learned about Earth in the process. Don't fall! ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShow Written by Dave Loos ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Thanks Tank Tumblr: http://thankstank.tumblr.com Sources: http://www.atlasobscura.com/places/kola-superdeep-borehole http://www2.gi.alaska.edu/ScienceForum/ASF7/725.html http://www.damninteresting.com/the-deepest-hole/ http://www.wirelinedrilling.com/sites/default/files/Kozlovsky%20Kola%20Deepest%20Well%20.pdf http://www.csmonitor.com/1985/0822/drock.html http://www.nytimes.com/1981/09/29/science/russians-plan-dramatic-expansion-of-effort-in-earth-drilling.html
Views: 8700959 SciShow
How a Tunnel-Boring Machine Drills Underground
 
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Video courtesy of CDM/HMM Joint Venture - For engineering enthusiasts and anyone who's interested in the mechanics of siphon construction, this animation shows exactly how the 110-ton, 300-foot-long tunnel boring machine will drill a distance of nearly two miles, 100 feet beneath the New York Harbor seabed. Find out more about the Staten Island Water Siphon project: http://www.nycedc.com/project/replacement-anchorage-channel-water-siphons
Views: 438092 NYCEDC
How to Create A Stratified Random Sample in Excel
 
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5-Minute tutorial on how to create a stratified random sample in Excel
Views: 82126 Timothy DAuria
How to Draw Contours Lines
 
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Tutorial on how to draw contour lines.