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Where Do Deleted Files Go?

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10:35
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Follow Michael Stevens for neat things every day! http://www.Twitter.com/tweetsauce LINKS AND SOURCES BELOW MUSIC BY: http://www.YouTube.com/JakeChudnow final song is "Midnight Sound" by Gareth Johnson / David O'Brien from: http://www.audionetwork.com Lost silent films: http://www.silentera.com/lost/index.html Wonders of the Ancient World: http://en.wikipedia.org/wiki/Seven_Wonders_of_the_Ancient_World What have we lost forever? http://ask.metafilter.com/80517/What-have-we-lost-forever http://en.wikipedia.org/wiki/Lost_history snapchat: http://www.snapchat.com/ Lenin and Trotsky doctored photos: http://www.tc.umn.edu/~hick0088/classes/csci_2101/false.html Archived person-removal-service site: http://web.archive.org/web/20060212134125/http://www.digital-restoration.com/unwanted.asp Google Ngram tool: http://books.google.com/ngrams links to info about digital file deletion: http://www.reddit.com/r/YouShouldKnow/comments/1e4p7g/ysk_how_deletion_works_on_a_computer_and_why/ http://en.wikipedia.org/wiki/Data_erasure http://en.wikipedia.org/wiki/Bad_sector http://en.wikipedia.org/wiki/Secure_erasure Melanie Willhide glitched photos (NSFW): http://www.slate.com/blogs/behold/2013/01/09/melanie_willhide_to_adrian_rodriguez_with_love_photos.html Electronic waste dumps in Africa: http://en.wikipedia.org/wiki/Agbogbloshie Paper-shredding: http://www.slate.com/articles/news_and_politics/explainer/2009/07/unshreddable.html UNSHREDDER: http://www.unshredder.com/www/407/1001127/default.asp Iranian reassembly of documents: http://www.bbc.co.uk/news/magazine-16036967 HEAT DEATH: http://en.wikipedia.org/wiki/Heat_death_of_the_universe HEAT DEATH button on etsy: http://www.etsy.com/listing/58392676/ask-me-about-the-heat-death-of-the entropy: https://en.wikipedia.org/wiki/Entropy "The Last Question" by Issac Assimov: http://www.thrivenotes.com/the-last-question/ bleached flags on moon: http://www.hq.nasa.gov/alsj/ApolloFlags-Condition.html
04:32
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And where do they keep their suitcases? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/jtotheizzoe As winter approaches, V-shaped flocks glide overhead as the world’s birds begin their long treks to warmer climates. Humans used to have some pretty crazy theories about where birds went for winter, like the moon, or to the bottom of the ocean. How did we learn the real story? And where DO birds go for winter? What are the longest bird migrations? How do birds store up energy for their long journey? How do birds navigate? Why do they fly in a V-shape? Find out in this week’s video! Charles Morton’s theory of birds on the moon: http://wrd.cm/1xMKc5k Read Charles Morton’s original 1703 pamphlet! http://bit.ly/1C5AKhk The story of the stork with a spear in its neck: http://bit.ly/11PgkIs Aristotle’s theory of bird transmutation: http://bit.ly/1uwQwHX The “barnacle goose” http://bit.ly/1C5BiUg The Arctic tern’s record-breaking migration: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2836663/ The bar-tailed godwit’s fat-fueled migration: https://sora.unm.edu/sites/default/files/journals/auk/v115n01/p0196-p0203.pdf Ruby-throated hummingbird mighty migration: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1325055/ The avian aerodynamics of the “flying V” http://bit.ly/1vFFlUs The many senses that birds use to find their way: http://bit.ly/11qN9vr How birds use magnetic fields to navigate: http://bit.ly/1r2jYLy Have an idea for an episode or an amazing science question you want answered? Leave a comment below! ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: http://www.facebook.com/itsokaytobesmart Google+ https://plus.google.com/+itsokaytobesmart For more awesome science, check out: http://www.itsokaytobesmart.com Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios Joe Hanson - Host/Writer Joe Nicolosi - Director Amanda Fox - Producer, Spotzen Inc. Kate Eads - Associate Producer Katie Graham - Director of Photography Andrew Matthews - Editing/Motion Graphics Dalton Allen - Post-production intern John Knudsen - Gaffer Theme music: “Ouroboros” by Kevin MacLeod Stock images by Shutterstock ----------------- Last week’s video: The Sixth Extinction: http://www.youtube.com/watch?v=z9gHuAwxwAs More videos: Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMUpcxPSA Why Did We Blow on NES Games? https://www.youtube.com/watch?v=4Gf9mtXnJfM The Science of Game of Thrones - https://www.youtube.com/watch?v=Utu-LpJn3Is There Was No First Human - https://www.youtube.com/watch?v=xdWLhXi24Mo How The Elements Got Their Names - https://www.youtube.com/watch?v=mtg9p6A6xnY
03:53
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Satellites are used for research by NASA, and used by television companies for our own entertainment. Eventually these satellites die, but what happens to them then? Trace is here to talk about a satellite graveyard on the dark side of the moon, and other places objects in space go. Read More: NASA Finds Lost Spacecraft on Dark Side of the Moon http://news.discovery.com/tech/gear-and-gadgets/nasa-finds-lost-spacecraft-on-dark-side-of-the-moon.htm "NASA scientists have found the crash site, pictured above, of a spacecraft set into orbit during the early 60s." LADEE Status http://www.nasa.gov/mission_pages/ladee/main/#.U1lJH-ZdXBE NASA's LADEE Spacecraft Just Crashed Into The Moon http://io9.com/nasas-ladee-spacecraft-just-crashed-into-the-moon-1564649339 "After 8 months in space, the LADEE spacecraft mission came to a close last night when the spacecraft crash-landed into the moon's surface — just like scientists intended." The Dark Side Of The Moon Is A Space Graveyard http://io9.com/the-dark-side-of-the-moon-is-a-spacecraft-graveyard-1567017530 "Last week, NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) ended its mission as planned, by smashing into the far side of the moon." NASA spacecraft slams into dark side of the moon as planned http://www.theverge.com/2014/4/19/5631600/nasa-ladee-lunar-mission-concludes-with-crash "At roughly 12:30AM ET early on Friday morning, a soda machine-sized NASA spacecraft slammed into the far side of the moon at 3,600 miles per hour." What's On The Far Side Of The Moon? http://www.universetoday.com/108186/whats-on-the-far-side-of-the-moon/ "You probably know we only see one side of the Moon from the Earth. But for the majority of human history, we had no idea what the far side looked like." Where Satellites Go When They Die http://www.slate.com/articles/news_and_politics/explainer/2005/04/where_satellites_go_when_they_die.html "On Tuesday a DirecTV satellite was launched into geosynchronous orbit from a platform in the Pacific Ocean." The Day Skylab Crashed to Earth: Facts About the First U.S. Space Station's Re-Entry http://www.history.com/news/the-day-skylab-crashed-to-earth-facts-about-the-first-u-s-space-stations-re-entry "On July 11, 1979, the world watched as Skylab, America's first manned space station, hurtled toward Earth." Watch More: How GPS Works https://www.youtube.com/watch?v=IoRQiNFzT0k TestTube Wild Card http://testtube.com/dnews/dnews-173-how-music-affects-your-brain?utm_source=YT&utm_medium=DNews&utm_campaign=DNWC Launch Your Own Satellite https://www.youtube.com/watch?v=0W_3x1wW7-M ____________________ 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
02:40
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Birds can travels thousands of miles between their summer and winter homes. Why don’t they get lost? Their secret is a sixth sense: magnetoreception. Learn more at HowStuffWorks.com: http://animals.howstuffworks.com/birds/bird-info6.htm Share on Facebook: http://goo.gl/dU1OtD Share on Twitter: http://goo.gl/n7wDYj Subscribe: http://goo.gl/ZYI7Gt Visit our site: http://www.brainstuffshow.com I’m Lauren, this is BrainStuff, and I have a topically relevant scenario for your consideration: Let’s say you want a change of scenery. So you set out with the clothes on your back, your innate knowledge of the world, and zip all else. No map. No smartphone. Nada. Would you be able to travel tens of thousands of miles, across oceans and continents? And then get back home a few months later? Because lots of birds do this every year. It’s called migration. And often these birds go to the exact same summer and winter spots, using nearly the exact same routes, every time. Ornithologists have speculated that birds might use a number of sights, sounds, smells, and learned social cues to get where they’re going. But young birds making their trip for the first time have been observed migrating successfully with no chaperones. What gives? Research has revealed that migratory birds have vision-based magnetoreception: They can see magnetic fields. And Earth is lousy with magnetic fields. Earth’s molten outer core is made up of iron alloys, which are swished around by heat coming up off of the solid inner core - and by the rotation of the Earth. That motion (plus the fact that iron is good at conducting electricity) creates a dynamo: A generator of electric and magnetic fields. Which basically? Makes Earth function like a giant magnet. North is positive, South is negative, and our planet is wrapped in slopes and curves of magnetic fields arcing between them. And migratory birds can sense those fields! Experiments over the past couple decades have shown that birds prepared to migrate south will align themselves with magnetic south – even if you create an artificial “south” in a lab. And furthermore: These birds see magnetic fields. Around 2010, researchers fit European robins with clear or frosted goggles, and found that the birds needed clear vision in their right eyes to navigate magnetically. Why not their left eye? No one knows. Scientists are now studying what biological mechanism might be responsible for this. The popular theory goes that magnetic fields cause a chemical reaction in birds’ eyes that affect their sensitivity to light. So magnetic fields might show up as brighter or darker patterns spread out over everything the bird sees. Like a map on a heads-up display. SOURCES: http://www.nature.com/nature/journal/v383/n6596/abs/383158a0.html http://www.int-ornith-union.org/files/proceedings/durban/Symposium/S17/S17.4.htm http://www.ks.uiuc.edu/Research/magsense/ms.html http://www.ngdc.noaa.gov/geomag/faqgeom.shtml http://www.epa.gov/esd/cmb/GeophysicsWebsite/pages/reference/properties/Magnetic_Susceptibility/Geomagnetic_Field.htm http://www.cell.com/current-biology/abstract/S0960-9822%2810%2900779-7 http://www.cell.com/biophysj/abstract/S0006-3495%2809%2900468-8 http://spie.org/x37204.xml?highlight=x2416&ArticleID=x37204 http://www.ks.uiuc.edu/Research/magsense/ms.html http://phys.org/news197872356.html
01:57
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When people fire guns into the air in a celebratory manner, those bullets have to go somewhere. Find out how high fired bullets can go -- and why they can be dangerous -- in this episode of BrainStuff. Whether the topic is popcorn or particle physics, you can count on the HowStuffWorks team to explore - and explain - the everyday science in the world around us on BrainStuff. Watch More BrainStuff on TestTube http://testtube.com/brainstuff Subscribe Now! http://www.youtube.com/subscription_center?add_user=brainstuffshow Watch More http://www.youtube.com/BrainStuffShow Twitter http://twitter.com/BrainStuffHSW Facebook http://facebook.com/BrainStuff Google+ http://gplus.to/BrainStuff
24:12
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Info Level: Intermediate Presenter: Eli the Computer Guy Length of Class: 18 Minutes Tracks Data Recovery Prerequisites Introduction to Data Recovery Purpose of Class This class teaches students how to recover files that have been deleted Topics Covered How Data is stored and deleted on hard drives Software to use to recover deleted files Class Notes Introduction Use free or inexpensive software Eli likes to use Recuva that can be downloaded at www.Recuva.com Size of Hard Drive and Data determine how long recovery will take CD's/ DVD's probably not a good idea to recover data to. Warning Stop using the computer Best to scan disk with another computer Understand How Data is Stored/ Deleted Files are not deleted, Pointers to files are deleted Once pointer has been deleted the file may, or may not be over written Securely deleted files cannot be recovered I.D.10.T Errors Be sure the file has actually been deleted
01:25
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Learn the basics about E-mail: how to delete an E-mail in your Inbox.