Artificial life | Self-replicating machines

Gray goo

Gray goo (also spelled as grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass on Earth while building many more of themselves, a scenario that has been called ecophagy (the literal consumption of the ecosystem). The original idea assumed machines were designed to have this capability, while popularizations have assumed that machines might somehow gain this capability by accident. Self-replicating machines of the macroscopic variety were originally described by mathematician John von Neumann, and are sometimes referred to as von Neumann machines or clanking replicators.The term gray goo was coined by nanotechnology pioneer K. Eric Drexler in his 1986 book Engines of Creation. In 2004, he stated "I wish I had never used the term 'gray goo'." Engines of Creation mentions "gray goo" as a thought experiment in two paragraphs and a note, while the popularized idea of gray goo was first publicized in a mass-circulation magazine, Omni, in November 1986. (Wikipedia).

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What is Dark Matter? A Mystery of the Universe

You've probably heard the term Dark Matter, but what is it, and how do we know it exists? Instagram: http://instagram.com/thephysicsgirl Twitter: http://www.physicsgirl.org/twitter Facebook: http://www.physicsgirl.org/facebook http://www.physicsgirl.org/

From playlist Space and the Universe

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Dark matter. Or what?

In this video I explain just what physicists mean when they speak about "dark matter" and what reasons we have to think that dark matter exists. In my two follow-up videos, I speak about the alternative explanation, modified gravity, and explain why the right solution might well be a combi

From playlist Physics

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What is dark matter?

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From playlist Science Unplugged: Cosmology

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What is Dark Matter? - Instant Egghead #1

Dark Matter is weird stuff -- "non-baryonic matter," as Scientific American editor George Musser puts it in this minute and a half take on the nature of the mystery substance that makes up the majority of the mass in our universe. This is episode 1 of our new video podcast, which you can s

From playlist Scientific American Channel

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What kind of particles comprise the dark matter?

Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu

From playlist Science Unplugged: Dark Matter

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What Is White Noise?

Jonathan defines what white noise actually is and how it's used to mask other annoying sounds. Learn more at HowStuffWorks.com: http://science.howstuffworks.com/question47.htm Share on Facebook: http://goo.gl/n7YNrZ Share on Twitter: http://goo.gl/Fq9InS Subscribe: http://goo.gl/ZYI7Gt V

From playlist Episodes hosted by Jonathan

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What If We're All Minions?? | Idea Channel | PBS Digital Studios

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateidea Is hateful Minion press still good Minion press? Tweet us! http://bit.ly/pbsideachanneltwitter Idea Channel Facebook! http://bit.ly/pbsideachannelfacebook Talk about t

From playlist Newest Episodes

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What are black holes?

If you're not sure what a black hole is, or even if you just need a quick refresher, Brian Greene explains what lies behind these cosmological powerhouses. Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us o

From playlist Science Unplugged: Black Holes

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Extreme Game Boy Repair | Restore | Enhance 😃

My cousin gave me her old broken Game Boy to see if I could repair it. These consoles are so important to video game history and are becoming more valuable and rare so I really wanted to try fix it and even make it look better than the day it was born. I show you everything I did but if y

From playlist DIY

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Black Hole Apocalypse — Official Trailer

Join astrophysicist Janna Levin and others as they hunt for clues about the nature of black holes. NOVA’s “Black Hole Apocalypse” premieres January 10 on PBS. NOVA on Facebook: https://www.facebook.com/NOVAonline NOVA on Twitter: @novapbs NOVA on Instagram: @novapbs

From playlist Previews

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This Slimy Fish Ties Itself in Knots

Hagfish are slimy sea noodles that wear their skin like a pair of loose pajamas... and that isn't the weirdest thing about them. Subscribe to the pin club here: https://store.dftba.com/collections/bizarrebeasts You can cancel any time by emailing hello@dftba.com Visit Nautilus Live for

From playlist Hagfish!

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Show Me Science! I'm Looking Through You

Show Me Some Science! is a new series of podcasts from the Little Shop of Physics. In this episode we use infrared light to look through different objects. Infrared light is a kind of light we can't see that is beyond the red end of the rainbow. Some things that are opaque to visible light

From playlist Show Me Some Science!

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Life, Sex & Death Among the Dire Wolves

PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ↓ More info below ↓ This is not a Game of Thrones fan fiction episode. Dire wolves were real! And thousands of them died in the same spot in California. Their remains have taugh

From playlist Ancient Fauna, Flora & Fungi

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Do Bugs Have Brains?

We can all agree that insects have heads, right? But what exactly do they have rattling around inside there? Do insects have brains like humans? Or is it just a bunch of nerves and goo? Well join Inés and Alie to get the answers and to hear how scientists are using bugs to learn new things

From playlist Collaborations (two-way)

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Hank: Eats Weird Stuff, Does Weird Things

We were pretty shocked to find out that there’s been a bizarre beast lurking in our own backyard, right here in Missoula, Montana, all along. Subscribe to the pin club here: https://store.dftba.com/collections/bizarrebeasts You can cancel any time by emailing hello@dftba.com Host: Sarah

From playlist Uploads

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JavaScript Tutorial | How To Create A Dungeon Crawler Game In JS | Introduction | #gamedev

Don’t forget to subscribe! In this JavaScript tutorial, you will learn to create a Dungeon Crawler Game in JavasScript. This tutorial will guide you through the main aspects of creating the dungeon crawler game. Together we will build game features with small iterations and discuss how d

From playlist Create A Dungeon Crawler Game In JS

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D3O: The Life-Saving Protective Goo

Scrolling through your mobile, you get distracted for a moment, and the phone slips from your hand. While watching the freefall of the phone for what feels like an eternity, you pray that nothing happens to the screen. There are various kinds of screen protectors on the market, but none

From playlist Radical Innovations

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The hidden meanings of yin and yang - John Bellaimey

View full lesson here: http://ed.ted.com/lessons/the-hidden-meanings-of-yin-and-yang-john-bellaimey The ubiquitous yin-yang symbol holds its roots in Taoism/Daoism, a Chinese religion and philosophy. The yin, the dark swirl, is associated with shadows, femininity, and the trough of a wave

From playlist The Way We Think

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What Will Monsters of the Future Look Like?

Share on Facebook: http://on.fb.me/1zfBmyr Whether it’s zombies, ghosts, or vampires, we’ve created monsters to help us conceptualize our fears and anxieties. Now that we live in an era of artificial intelligence, the Internet of Things, and big data - what does this mean for monsters of

From playlist Jonathan's Top Videos of 2014!

Related pages

Molecular nanotechnology | Decision tree | Exponential growth | Self-replicating machine | Astrochicken | John von Neumann