Black Holes aren’t Black they are Gray?

Ok so 40 years ago Stephen Hawking came up with the theory of Black holes and today they are not black but gray. It turns out that the black holes Hawking wrote about in 1974 — those places in the space-time continuum that can devour galaxies and even trap light forever — may not exist in the way that he proposed decades ago. So I read the paper. I found it a bit dry compared to A Brief History of Time but that is the life of a paper. I have always believed a theory is just that and no more, prone to evolve or be disproved with the advent of new theories and facts. After all it is just a theory and not a fact even though many of these theories enable us to the most amazing things. Which reminds me of a joke. A Canadian fisherman was down south fly fishing with an American fisherman that happen to be a marine biologist. Soon the Canadian fisherman caught a one pound brook trout and stated it was just a baby and threw it back. The American marine biologist not objecting to catch and release, objected to the Canadian calling a one pound Salvelinus fontinalis a baby. He explained to the Canadian fisherman that the Salvelinus fontinalis is genetically unable to grow larger than one pound. The Canadian fisherman retorted I catch five pounders in the Boyne River all the time and that was just a baby where he comes from. The American marine biologist objected to the Canadian calling a one pound Salvelinus fontinalis a baby. Again he explained to the Canadian fisherman that the Salvelinus fontinalis is genetically unable to grow larger than one pound. Not wanting to argue the Canadian fisherman let the subject lye and spent the rest of the day fishing throwing their catch back. At the end of the day they exchanged addresses and parted friends. A month later the American marine biologist received a parcel in the mail in it was a frozen five pound brook trout, distraught he began to write the Canadian fisherman a letter. “Dear Mr. Fuddel Duddel Thank you for the five pound specimen of the Salvelinus fontinalis, and thank you very much for ruining perfectly good science with a fact. Sincerely John Doe”

Topic by Josehf Murchison 

End of World One Step Closer. Or Not.

A vast physics experiment - the Large Hadron Collider (LHC) - reaches a key milestone this weekend ahead of an official start-up on 10 September.Engineers had previously brought a beam of protons - tiny, sub-atomic particles - to the "doorstep" of the LHC.On 9 August, protons will be piped through LHC magnets for the first time.The most powerful physics experiment ever built, the LHC will re-create the conditions present in the Universe just after the Big Bang.This last sentence is the one that's caused a little panic amongst certain groups of the population - they are convinced that the experiment will create miniature black holes which will fall through the LHC towards the centre of the Earth, where they will orbit around, gradually consuing the planet from beneath our feet.When the collider is commissioned, the beams will cross paths at allotted points along the tunnel, smashing into one another with cataclysmic force.My God, have these people never seen Ghostbusters??Scientists hope to see new particles in the debris of these collisions, revealing fundamental new insights into the nature of the cosmos and how it came into being. Now that is seriously cool (well, hot, actually) - to be able to recreate what the whole of reality looked like mere femtoseconds after it started...BBC storyCritics have previously raised concerns that the production of weird hypothetical particles called strangelets in the LHC could trigger the mass conversion of nuclei in ordinary atoms into more strange matter - transforming the Earth into a hot, dead lump.Earlier BBC storyAmusingly paranoid storyAnalog Magazine article

Topic by Kiteman   |  last reply

The Large Hadron Collider: is it worth it?

The Large Hadron Collider(LHC) is to be unveiled this year. It is designed to solve the much talked about energy crisis, and hopes to do so, but can it be worth all of it? From Wikipedia- (On October 25, 2005, a technician, José Pereira Lages, was killed in the LHC tunnel when a crane load was accidentally dropped. The construction of LHC was approved in 1995 with a budget of 2.6 billion Swiss francs, with another 210 millionfrancs (€140 M) towards the cost of the experiments. However, cost over-runs, estimated in a major review in 2001 at around 480 million francs (€300 M) for the accelerator, and 50 million francs (€30 M) for the experiments, along with a reduction in CERN's budget, pushed the completion date from 2005 to April 2007.[14] 180 million francs (€120 M) of the cost increase have been due to the superconducting magnets. There were also engineering difficulties encountered while building the underground cavern for the Compact Muon Solenoid. In part this was due to faulty parts lent to CERN by fellow laboratories Argonne National Laboratory or Fermilab (home to the Tevatron, the world's largest particle accelerator until CERN finishes the Large Hadron Collider). [15] The total cost of the project is anticipated to be between US$5 and US$10 billion.[2] On March 27, 2007, there was an incident during a pressure test involving one of the LHC's inner triplet magnet assemblies provided by Fermilab and KEK. No people were injured, but a cryogenic magnet support broke. Fermilab director Pier Oddone stated 'In this case we are dumbfounded that we missed some very simple balance of forces.' This fault had been present in the original design, and remained during four engineering reviews over the following years.[41] Analysis revealed that its design, made as thin as possible for better insulation, was not strong enough to withstand the forces generated during pressure testing. Details are available in a statement from Fermilab, with which CERN is in agreement.[42][43])

Topic by BkrevWlevqe   |  last reply

black powder charcoal

I'm making charcoal for BP using macadamia wood in a tin on a BBQ fire. The smoke is PISSING out the 1/4" hole i made in the lid but won't ignite. Any ideas/suggestions welcome.

Topic by ThreeFifty   |  last reply

Gravitational Waves? Answered

While I was watching a show on the Science Channel about Black holes, it mentioned that black holes send out spiraling waves of gravity. If we were hit with said wave, ( on the occasion we survive a black hole) that had traveled from a far distance, would everything become much heaver and everyone would fall over? Would we lose our moon? What would/could happen?

Question by Fizzxwizz   |  last reply

Have we see the event horizon of the Galactic black hole?

A preprint submitted to the Astrophysical Journal (Ap.J.) last week makes a compelling case for conclusive observational evidence for an event horizon at the compact object Sagittarius A* (Sgr A*) at the center of the Milky Way galaxy. Recent observations with mm radio waves have determined Sgr A*'s mass , distance and diameter (Nature 455, p.78), which make it "very likely" to be a black hole, unless there is some sort of exotic physics leading to a compact, but still extended and visible, object at that location.This new paper uses very general arguments from energy conservation and radiative efficiency to demonstrate that it is "impossible" for the object at Sgr A* to have a visible surface onto which accreting material collects and radiates. While the authors go through calculations in standard General Relativity for demonstration, their results hold much more broadly than that, covering any gravity theory which includes stationary solutions (i.e., horizons).If there is an object with a real surface at Sgr A*, then all the material falling in must either give up it's full potential energy into radiation as it is falling, or we should see a separate, thermal spectrum from the surface of the object itself. The Sgr A* spectrum is extremely non-thermal; any thermal component is less than 0.4% of the total luminosity we see. That is equivalent to saying that the accretion efficiency (how much radiation you get from the falling material) must be at least 99.6%, compared to the actual efficiency estimated at 0.01 to 1% for Sgr A*.On the other hand, a "horizon" by definition is a position in space "below" which photons just can't get out. Material can fall through a horizon with no difficulty, but we will never see it, or any radiation from it, again. Whether there is a black hole or some other exotic object inside the horizon, it is invisible. The accreting material's luminosity may well be "low" (as observed); the rest of its potential energy is "lost" to our observation when it falls through the horizon.

Topic by kelseymh   |  last reply

Has anyone created a rotating light blocker tube for a fixture before? Answered

I'm trying to create a slow rotating tube within a tube light blocker for a black light fixture I have. The fixture measures 2inches by 2feet and is a fluorescent tube style. I want to be able to have the outer tube rotate around the light, have a slot cut into it so the light can come out but when it's past the light, the hole is blocked by an inner tube so no light escapes. I figure the RPM would be about 2-4. This is for Halloween. The inner tube would be fixed into position and the light fixture be attached to it. Does any of this make sense? If it does and you know of another project like this, please send me a link.

Question by javajunkie1976   |  last reply

help with black powder rocket

Hi i am making a black powder rocket similar to a bottle rocket just bigger scale and am having trouble with it ill give as much info as i hope someone can help me out thanx the rocket engine is 53 mm in length 1.5 mm thick wall 16 mm inside wall to wall hopefully that all sounds ok the (nozzle) in the end is 6mm thick was planing on filing it with black powder and packing it in around a core with 42 mm of powder and a further 5mm plug on the end then turn it over and put in a fuse etc... strap to a small stick or skewer and launch what i am wanting to know how big should the nozzle hole be to actually get lift off and should i just insert a fuse or a fuse and quick match or fill the core with loose black powder and make a paste of black powder and plug the end and insert a fuse onto that im probably going the complete wrong way about this if i am feel free to tell me what im doing wrong or what i need to do thanks

Topic by acid_clown   |  last reply

What would the approach of a black hole do from an atoms perspective?

IE on an atomic scale. Would the atom get stretched out or torn apart at all? What if the atom were traveling at lightspeed directly at or sideways to one? All google is giving me is silly micro-BH stuff and absolutely nothing relevant.

Question by The Ideanator   |  last reply


How many of you listen to them? If so, what's your favorite album? Song? Band member?

Topic by razzlekunai   |  last reply

All right, who stayed up to watch it?

Who saw the LHC first beam? Anybody? My sister and I stayed up until the wee hours of the morning to watch it. The stupid live webcast didn't work. Oh wells. We'll surely see it on the would've been cooler to watch it live though. : \ On another note, I told you so. :D

Topic by Lithium Rain   |  last reply

Can a Singularity Exhibit an Electrostatic Field ? Answered

What is wahh.......  a small black hole ...........  that's a singularity. If you bombard  it  with electrons ( which carry a negative charge ) will the tiny Black hole be attracted to your pet cat.   Cat fur looses electrons easily and acquires a positive charge.

Question by iceng   |  last reply

S=AFc3/4plancks constant GHow do I interpret a black hole entropy?Simple definition plz?

S=AFc3/4plancks constant GHow do I interpret a black hole entropy?Simple definition plz

Question by iamboredalot   |  last reply

how to fix holes in a polyethylene/polypropylene solar heat exchanger Answered

This solar heat exchanger is a 5m sq flat sheet consisting of two layers of black polypropylene or polyethlene (not sure which)with rows of fine bore plastic tubes sandwiched between through which water is pumped from the pool at low pressure.The water warms whilst passing through the system, then empties back into the swimming pool, hence, free pool heating. After 2 seasons of use, there are a few leaks at the joints where the fine tubes meet the main inlet tube. I tried to seal them with glass fibre, then cyano-acrylate resin...nothing stcks to this type of plastic. Any ideas for sealing these holes? The plastic is too fine to use a heating method.

Question by MalKnowles   |  last reply

My Epson Stylus Photo 900 printer won't recognize a refilled black ink cartridge. Does anyone know how to fix this? Answered

I put more ink into the black cartridge when it got low with a refill kit. The printer won't work and keeps flashing "black cartridge needs replacing" ! Is there a secret step I must do? The new cartridges have a thin film over the bottom ink hole, so I tried scotch taping it to simulate a new cartridge but that did not work! Help please !

Question by triumphman   |  last reply

Could someone post an 'ible on making a prop of Emile's kukri from Halo: Reach?

Look at the title. A prop, preferably realistic, specs, blah blah blah.  "I'm ready! How 'bout you!"

Topic by black hole   |  last reply

I poked a hole in my mini fridge freezer and I tried to fix it with superglue, was that a bad idea?

I was trying to pry ice off of the freezer because the ice was stopping the door from closing. I was using a Flathead screwdriver and a hammer. I hit the ice and started hearing a hissing noise, so i got scared and immediately unplugged it. I tried super gluing the hole shut, and i'm wondering if that was a terrible Idea or if that will fix it, and another important question is will the gas that came out poison my food/ drinks. Also I don't know the model but it is from black and Decker.

Question by les8   |  last reply

Cannot embed youtube link, something I'm doing wrong? Answered

I'm trying to add a youtube link to my instructable but keep getting an error. I've tried different youtube links to different videos to no avail. Have I wandered into an instructable black hole?

Question by Make_Things   |  last reply

How to prevent slightly broken LCD multitouch screen from further damage?

Dell XT2 laptop. I would be very grateful for couple of advices. Is there a way of not spreading upper crack during everyday usage like a black hole in "Dark Water" ?

Question by DDevilPL   |  last reply

Problem with trackpad on Dell Latitude D820 Answered

Is there a way to turn of the 'tap to click' feature on my Dell Latitude D820? It's really been bothering me. For example, I'll be typing a paper and then my hand will brush the trackpad, moving the cursor to elsewhere on the page. Any help will be appreciated. 

Question by black hole   |  last reply

BBQ Burner?

I'm thinking of building my own Pig Roaster / BBQ, the problem is I want it to be 60" long and I have not found a propane BBQ burner that is long enough. Can you make it out of Black Gas Pipe? If so what diameter should the burner holes be? Regards, Dennis

Question by thexporter   |  last reply

Can light collide with light? Answered

If two electromagnetic waves intersect, what happens? Is light 'immaterial' or without density, is light weightless? The photograph below is not related to this question in any way.

Question by nepheron   |  last reply

speaker connection for an MP3 player

My friend has asked me to make something so he can connect his stereo speakers into his MP3 player.They are speakers that have the black and red wires that you put into the back of the stereo, no plugs or anything and i already know what im going to make but im just not sure on the soldering points. I'm going to get a hobby box cut a hole in the front of it and put in a board of four speaker plugs then solder all of those to a cable that can plug into his MP3 player. Should i just solder all the black cables together and all he red cables together inside the box then connect them to the red and black cable to the MP3 player? The photos are the speaker plugs in going to use and a crappy MS paint picture of what im talking about

Topic by craig3   |  last reply

2 stroke motor help?

Hi guys I built something similar to this anyways the coil thingy that the guy cut a circular hole for came off my engine. There's magnets in it. I'm pretty sure that the magnets drive the spark plug as there's a small black piece that hooks to the plug. So am I screwed?

Question by thejrb   |  last reply

Help with iPod Touch Storage?

I have an iPod Touch(4th gen, 8GB) and I've noticed a few discrepancies in the storage. When I add up the space taken up by my 'stuff'(apps, music, etc) I get about 1.6 GB, but the thing on the iPod say I've taken up 3.4 GB. Is this normal, and if not, what can I do about it?

Question by black hole   |  last reply

Would it be possible to mix titanium and steel? Answered

Theoretically, could it be possible to mix titanium and steel and get the best of both? Let’s just assume that cost and difficulty are not an issue? Imagine the possible uses for a metal that was non-magnetic, non-conductive, corrosion resistant, and with a great strength to weight ratio, while being as hard as tempered steel. For one thing, it make a fantistic knife. So, the question is; Would it be possible.

Question by black hole   |  last reply

Removing Broken M2 Tap from Anodised Aluminium 2014.

Hello Everyone,As you might have read, I have a Milled Aluminium 2014 Block which is Anodized with Black color, Today when I was tapping the holes of it, the M2 Tap broke and got stuck inside that hole, there is no portion of it outside the hole, so I can't unscrew it and pull it out.I saw a few videos on youtube on how to use alum water, or electrolysis(with 10% dil H2SO4) to dissolve or chemically remove the Tap bit from the hole, But my question is is it possible that using any of the above options could destroy the anodizing on the job work. and is there any other easy method I can use?Please Note that the tap bit is M2 and There are no tap extraction tools for a bit that small on the internet (or Locally Available in India) but if you find one Please post links for the same. Please Be Positive and make this community a happy place. Thanks.

Topic by _Boltz_   |  last reply

Does a bolt on a knex gun pin reduce power? Answered

For example:  You have a black rod pin with female ball socket on the end. You attach three orange connectors to make their holes travel on the pin guide And to look like a bolt. Does this reduce power?

Question by Knex.X   |  last reply

Anyone know how to make healthy Candy Corn and/or Hot Tamales?

I am extremely fond of both Candy Corn and Hot Tamales. However, I wish that they didn't include such toxic ingredients, like "Red 40" and "Blue Lake 5". I would be grateful if someone could either post an 'ible or answer with a recipe.

Question by black hole   |  last reply

How to amplify your acoustic guitar for under $10

Amplifying an acoustic guitar method 1 If you have a musical birthday card or whatever at home, remove the audio unit its the 1" or so round disc usually white with a small brass ring around the edge, handle carefully as they are not to strong., keep the wires on it by snipping at the opposite end, it will make things easier later, If you don't have one, buy a $1 musical card of any discription and proceed as above. Next wherever you are comfortable with it, drill a 1/4" hole to accommodate a 1/4 Mono jack socket Next solder two wires to the jack socket one to live tag and one to shield use two different colour wires and id the earth one, say if its black make a note of that(earth tag) make them about 6" long, fit socket into hole by putting your hand with socket into the sound hole and into the hole made to take the jack socket, screw the nut on socket end to make firm bring the wires out of the sound hole, fix the earth wire to the wire that goes to the outer ring on the disc (Solder (Best) or twist and tape connect the other wire to the remaining wire from jack socket.put some blue tak on the outside of the disc the opposite side to where the wires are attached put your hand in the sound hole and press the disc to the underbody a position about central under the bridge, you can experiment for best position for you. PS attach the disc with the small hole in center and white plastic area facing upwards under bridge, or wherever you like it best.....Plug into your amp adjust according to your liking and away you go. Method 2 As above except dont drill a hole rather place the jack socket via blue tak or velcro to the top of the guitar by the edge towards the rear of guitar, where the wires exit the sound hole blue tak them the the underbody to keep neat and out of the way.

Topic by fenderphil   |  last reply

Finding googols without a search engine!

It is not often that you encounter a googol as a "measured" (or inferred) quantity referring to something physical. A preprint out today on arXiv:astro-ph presents a calculation of the total entropy of the observable Universe (in units of Boltzmann's constant, k), coming up with a result Sobs = 3 × 10104 k. The dominant contribution is from supermassive galactic black holes, for which the entropy is proportional to their surface area, which in turn scales like the mass squared.

Topic by kelseymh   |  last reply

Does anyone know of a fluoride toothpast that is sls free?

I just got braces, and, on dentist's orders, I am to use "Prevident5000" fluoride toothpaste every night -- for 18 months. This simply won't work, because I'm allergic to sodium laurel sulfate (sls), and get killer canker sores within hours if I use anything with sls-namely, Prevident5000. Could someone recommend a brand of fluoride rinse lacking in sls?  

Question by black hole   |  last reply

Can anyone identify this bayonet? Answered

I have a (probably) WWII-era bayonet that I would like identified. The dimensions are as follows: Overall length: 17.75" Blade length: 11.50" Handle length: 5.25" Blade width:.875" Blade thickness:.25" Handle: Wood scales epoxied to skeletonized metal tang Sheath: Olive green paint on metal I would like to know the type (i.e. m1942), era, and any other relevant info.  

Question by black hole   |  last reply

Why do people always think the world's ending!?

Once again someone thinks the world's gonna end soon. Someone is suing CERN because their afraid that the new atom smasher (Large Hadron Collider (LHC) along the French-Swiss border) is going to create a black hole and suck up the Earth in a month or so. I think its gonna be another failed doomsday theory, like it probably will be.

Topic by wingman246   |  last reply

Can I put a CD into a scanner to scan the art on the non-playable side without doing any damage to the data on the CD? Answered

I'm planning to make a copy of the CD in question to give as a Christmas present. I want to scan the art onto my computer and then print it out and glue the duplicate art onto the copy CD. However, I don't want to damage the original. Is there any way that my scanner (Lexmark) could damage the stuff on the CD? 

Question by black hole   |  last reply

Help needed identifying an electronic component !? Answered

Hey so I found this thing full of coloured wires in a parking lot, And I was wondering what it could be..  It has a huge black connector,  that connect 10 coloured wires, and it end up with blue thingy cap, and thats what im looking for. I salvage one of them to see what was inside, but it didnt help very much, wire is covered with brass piece around it, then another brass piece around then a blue hard plastic shell..  and there a lot of grease inside.. Theres a hole at the end of the blue cap, but It doesn't seems to be a place to connect something, because to hole is tiny and the shell is hard (shrinked) so its no elastic ( see pictures!) You know what it could be ? Thank you!!

Question by Patented   |  last reply

Favorite Quotes.

What are your favorite sayings? Mine are: "One can never know for sure what a deserted area looks like." - George Carlin. "I have never let my schooling interfere with my education." - Mark Twain. "One tequila, two tequila, three tequila, floor." - Steven Wright. "It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt." - Mark Twain. And last but not least, "Tomorrow's another big day!" - Calvin's mom. Comment with your own!

Topic by black hole   |  last reply

Very old e-mail address not updatable

I am about to get a new internet provider and a new e-mail address. For that reason I just tried to see if I could change my e-mail in my instructables profile. Unfortunately, I quickly realised that I have neglected this house-keeping task for some while. My old address stored here is waaaaay old, which means that the confirmation e-mail from you will fall into a black hole. Please send suggestion to or Yours "all_thumbs"

Topic by all_thumbs   |  last reply

Uses for a K'nex steel rod?

So I own a 39.1 cm (15.4 in) K'nex steel rod, which I got from the 6 ft. Knex Ferris Wheel set. Does anybody know any good uses for this rod? I should point out it is slightly thicker than the typical K'nex rod, has no places to clip on connectors (other than on the ends) and creates a lot of friction with the holes in connectors (so no epic single shots unfortunately). The rod is also quite heavy. The picture is a comparison between the steel rod and a strengthened grey rod (black).

Question by Perk1ns   |  last reply

Interstellar (movie) ScienceFiction

Spoiler alert. The butler did it!!  Just kidding.                 Category: Weird Planets! Water Planet-  How'd they know that the sea was shallow enough to land in? The ship's engines apparently can't run if wet. So landing here was pretty risky. Would you land a plane in a foot of water not knowing if it was 1000' of water? You can't take off if the engines are wet!                         When a big wave hits, (on earth) one of the signs is that the water in a bay will recede. Why didnt this happen when the big waves hit in the film?   Ice Planet-  80% of earth's gravity (IIRC)  Yet a "frozen cloud" can hold up it's own weight. Fun world, very sculptural. Is there any way these shapes can hold themselves up?  Might be more believable if planet had 10% of earth gravity.  Those jump jets also more plausible in low G.                 Category: Black Hole Appearance-  At first, this seemed pretty artsy- bizzare. But i'd read that lots of research + computer modelling went into it. So here's my assumtion explaining the visual:  The black hole has a simple ring of hot debris orbiting it like the rings of saturn. This stuff isn't close enough to have it's light sucked in. Looking above, or below the "hole", Light from the backside of the ring is bent around to our "eyes" by gravity. This causes the illusion of a second ring perpendicular to the first one. If we coud "look"  with some means unaffected by gravity, we would "see" a single ring.                 Category: Demise of Earth IIRC, the crop  blight is "using up" the N2 in the atmosphere??  um...  Overall, a really good flick, addressing big human questions. Of course the human story is the most important, tough decisions face these characters....  but chat on sci should be fun, too. 

Topic by Toga_Dan   |  last reply

How do I "unbrick" the Electronic Brick shield? Answered

I'm trying to connect external sensors (in the picture below - 2 tilt switches), to an Electronic brick shield like this (see picture): I extend 2 buckled plugs from the shield with male-to-male headers. As far as I can understand from their cookbook - white supplies gnd, red gives +5v, and black is the signal - so I take the gnd and +5v from *one* of these cables and connect them to the breadboard's -/+ busses. Black goes to the switch (and to gnd via a pul-up resistor). The second switch takes +5v from its plug's red line (could also take it from the bus - but it looks neater this way), The other side of the switch goes to the black line (yellow jumper). This setup simply turns off the Arduino (short-circuit?). Pulling out the buckled plugs turns it on again. This tilt switch setup is pretty simple (I've tested it without the Electronic brick shield - sending the inputs from them to LEDs - and it works fine). I've also tried "unbricking" the LCD brick itself (That's what I'm really after) by sticking jumpers into the holes in the bus cable (according to what I've gathered from the Electronic Brick cookbook), and I couldn't get it to show anything or turn on the backlight. Is there some voodoo I'm missing here? Thanks.

Question by thedod   |  last reply

BBC Four did an Instructable: How to make a camera obscura

I wonder if they know that they did?For some reason the video-embed says the video is no longer available. It is, I just watched it.The link is But, if that doesn't work either:An Italian photographer takes over a room in a Venetian palace. They cover all the windows in opaque black plastic sheets. They wait a moment to let their eyes get used to the dark, then cut a hole in the plastic, about 3 inches square.An image of the view outside appears "magically" on the wall opposite - upside down, but perfect in every colourful detail.

Topic by Kiteman   |  last reply

Watch out everyone, the worlds ending. Sorry about that.

Scientists hit with 'end of the world' legal challenge over Big Bang experimentSep 1 2008THE biggest scientific experiment in history has been hit by a last-minute legal challenge - amid fears it could cause the end of the world.Opponents of the Large Hadron Collidor claim the machine may create a mini-black hole that could tear the earth apart.The £4.4billion machine, the most expensive experiment in history, is due to be switched on at the European Nuclear Research Centre - CERN - in Geneva, Switzerland, in nine days' time. Those behind the project hope it will unlock the secrets of how the universe began by replicating the conditions of the Big Bang.The machine will smash pieces of atoms together at high speed and generate temperatures of more than a trillion degrees Celsius. The collisions will create temperatures 100,000 times hotter than the centre of the sun in a space a billion times smaller than a speck of dust.But opponents fear the worst. An application for an emergency injunction was rejected on Friday and now the case will continue under human rights laws.German chemist and academic Professor Otto Rossler, one of the project's opponents, said: "CERN has admitted mini black holes could be created when the particles collide - but they don't consider this a risk. "My calculations have shown it is quite plausible these little black holes survive and will grow exponentially and eat the planet from the inside."We do not believe the scientists at CERN are taking all the precautions they should in order to protect human life." Professor Rossler claims in the worst-case scenario, the Earth could be "sucked inside out" within four years of a mini black hole forming. He argues the research violates the right to life under the European Convention of Human Rights. The legal challenge is against the 20 countries, including the UK, behind the project.Scientists involved in the project have dismissed concerns as "absurd". Particle colliders have been used by scientists for over 30 years without any noticeable harm to the planet. This latest machine, however, is the largest and most powerful ever constructed. Built 300ft beneath the French-Swiss border, it will fire particles round its 17-mile circumference 11,245 times per second before smashing them into each other.The machine will be activated on September 10, although it will be several weeks before the first particles are collided. Scientists hope that, among the debris thrown off by these collisions, they will find the elusive Higgs boson thought to be responsible for giving every other particle its mass, or weight.The CERN facility faces a second lawsuit due to be heard tomorrow, filed by environmentalists in Hawaii. But a safety report published this year gave the project the all-clear. It said nature produces higher collisions than the collider is capable of when cosmic rays hit the planet.CERN spokesman James Gillies said: "The case contains the same arguments we have seen before. "We are now concentrating on firing the first beams around the collider and then on fine tuning it until we can get collisions - when the science will start."Source: Daily Record OnlineWhat do you think about, A) this amazing use of particle acceleration and B) the technically plausible but remarkably unlikely end of the world scenario it might create?

Topic by lifelong-newbie   |  last reply

what electronics would I need to put between 3 AA batteries and a female USB to allow for proper charging [5.2v 450mA]? Answered

I bought a cheap LED flashlight that charges with a decently sized solar panel. I opened it up and found that it holds 3 AA rechargeable batteries and has a reasonable amount of free internal space, I was thinking of putting a hole just large enough for a female mini-usb port.The 3 batteries are 1.2V Ni-Cd 500mAh.And there's a black ... thing ... that says:IN819WXDHand the resister is brn blk blk gldlet me know if ya have a solution [=

Question by Andrewid   |  last reply

Custom Fish tank stand

I am creating a custom fish tank stand from 2x4s and sheet wood. I plan to paint it black but I ran into 2 problems when I decided I didn't want the hood that came with the tank. 1) The lighting.     I have a pretty good history with LEDs so creating the lighting will not be too hard, only real issue I run into is sealing the lamp. I plan to use an acrylic sheet with holes drilled for the white and blue LEDs. White for day and a row of blue for moonlight on a 3 way rocker. I just dont want water to penetrate the holes from the ports for the light to damage the components. 2) The filter.    This is where I am at a loss. I plan on making something similar to this: But I have no idea how to an external filter rather than one of the regular table top aquarium ones that would not look very pleasing on a nice stand. Any ideas questions comments or concerns please ask.

Topic by yours31f   |  last reply

If you could...

If you could... Spend an hour anywhere in the universe, at any point in time, where would it be? Meet 5 different people, from any point in time, who would they be? Have any one "superpower," what would it be? For me: Place: Mars, about 70 years ago. People: 1) Ernest Chappell, actor on Quiet, Please!, a 50's radio show. 2) Wyllis Cooper, writer for Quiet, Please! 3) Eoin Colfer, author of the Artemis Fowl series. 4) Ernest Emerson, founder of Emerson Knives and the Emerson Combat System. 5) Mikkel Maltha, the keyboardist/ bassist/ backing vocalist for the Danish band CRYOSHELL. Superpower: The ability to alter my molecular density, rather like Seth's in "Race to Witch Mountain" What would you choose?

Topic by black hole   |  last reply

Standing (punching) Bag

Hi Everybody I have been boxing for sometime now and have been using a hanging heavy bag. But now I want a little more of kickboxing, so I need a standing bag. But I cant find one here. My "Instructables mind" kicked in and I decided to make my own. I also though of adding a pull bar to it. As in the photo, The black line is the bag stand, and the red one shows the pull up bar. I decided the wall and stand to be 5 feet apart. I may get something up but I thought of getting some professional advice before plunging in. Initially, I planed on digging a hole(about a foot deep) and then using mortar to make a properly round hole so the pole could just slide in whenever I want to use(coz it cant be permanent). And for the pull up bar I could drill a hole in the stand and push the pipe through it and attach a threaded pipe flange to the wall. Should I use pipe or wood. I prefer wood cause its easy to find. People around here have shifted to PVC, so I cant get the pipe from the general sanitary store next door. But I would somehow find it. I need functionality right now. Also if I use the pipe, would filling it up with concrete or mortar strengthen it??? So that's my idea. Any advice is welcome. I need something quick cause I plan to get it done the day after tomorrow.

Topic by Venemot 

Muppets Animal Costume?

Hi Guys Everyone on this site is so fantastic at making stuff I wondered if one of you might be able to help me to make a Muppets Animal Costume for my friend. I'm thinking of glueing 2 pieces of foam together (will sort of look like Stewie family guys head) as the base then cutting a hole out for the mouth. Ping pong balls for the eyes and some fake fur. I'm going to use a black mesh/netting for the inside of the mouth so you can't see my friend inside the costume/ What do you think? Anyone got any ideas that would work better? If anyone could do an instrucauble for this I will be your bestest friend. Thanks everyone PS: The party is at the end of November, so I guess I should be making it already!

Topic by fluffyandpink   |  last reply

what are the specs to making a fog ball cannon from a rubbish bin, fog machine rubber band and garbage bag? Answered

hey, a while ago in high school out teacher was showing uss tuff to do with the transferance of energy and stuff like that, what he brought into class one day was a rubbish bin, with a hole cut out bottom, and on the lid, there was a rubbish bag(the big black ones) , on top with a rubber band taped to it. basicaly the way it worked was, the band is taped to the bag,m when you pull the band back, you pull back the bag also, which pucks in air into the hole in the bottom of the bin,but at this time the hole is actually the top of the cannon, as thats where the air enters and comes out. now when the air is being sucked into the bin, our teacher also had a hose from a fog machine attached to it, which made the bin suck up air, now when he let the band go when the bin was full of air, a ball of air shot out, and the fog remained inside that air ball so we could see where the ball went, which was around 20 meters, anyway, the fog ball could nock over polystyrene cups from 20 meters. i want to know exactly how to build one of these as i cant really remember how they look like as i have forgotton, i was reminded of these once when i saw one being used on rollercaoster, in the minishow, elliot and the surfing scientist.

Question by oldmanbeefjerky   |  last reply

How would I make a prototype/final model of this speaker design?

Hello all, I am working on a design project in one of my 3rd year university classes in which I've to create a final model of my speaker design. It is in the form of a black hole and I would wish to make it from a plastic (preferably ABS or some hard, durable material). I've attached some images of the CAD model and I was just looking for some ideas, techniques and suggestions on how I could make this form. Any machine and technique is relevant as I have access to a wide range of equipment, I was just looking for some pointers on how I could potentially go about making it. Any help would be greatly, GREATLY appreciated, thanks for your time! James

Question by JamesMcKernan   |  last reply