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https://sites.google.com/site/scienceandmathguide/
>>
Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.

If you want advice regarding college/university or your career path, go to /adv/ - Advice.

If you want help with your homework, go to /wsr/ - Worksafe Requests.

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>DNA repair discovery could lead to drugs to reverse ageing, fight cancer and help space travel

Remember when /sci/ said biology was a shit major?

http://www.abc.net.au/news/2017-03-24/dna-discovery-could-lead-to-anti-ageing,-cancer-fighting-drugs/8380850

>they won nasa's competition
>they beat hundreds of legitimate stem companies

There is no recovery from this, /sci/ is eternally btfo.
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>>8772934
youre a dick, get over yourself
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>>8772974

Do you have your name on even one paper? I bet you don't even go to a top ten school.
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>>8772832
>waiting for the regulations
Im gunna inyect that shit right now nigga if I get cancer weed comes to the rescue
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>>8772990
considering how much weed i smoke im already going to live forever so i dont even need this cancer pill
>>
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>>8772970

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How should a brainlet with no prior CS skills enter into computer science? i.e. what should I introduce myself to first and any additional steps or guidance to get the ball rolling?
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>>8772638
I'm sure your local community college was major
>>
Have a goal besides learn programming. There are a million fucking books you can go right with but without any real motivation or goal it's pointless.
>>
>>8772634
>don't learn C++
>learn Java

don't listen to this guy OP

The first language your going to want to learn is C.
All modern languages are derived from it, and therefore it is present at the lowest levels of abstraction for essentially all digital electronics.
It's basically the Latin of programming languages except its everywhere.
It's a universally appreciated language and is the best language to start with since you learn how the computer interacts with code on a low level. This carries over to any additional languages you may learn after C (but wouldn't be the case if you learned literally any other language first).
>>
just get that book that tells you everything to pass a+
>>
>>8772136
Maybe learn how to live in China or India on 1 dollar a day to start with so a Passport will get that ball rolling.

21st century, learn a skill or trade that can't be outsourced and carries some sort of aversion to immigrants from the third world. Thanks me later.

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Last day of Spring break here, and my email is already blowing up about how I made a grading mistake and they had the correct answer. They're even attaching pics of their tests to the emails. HAHAHA our department policy is to scan and copy every exam before we grade it, and guess what? They're changing their answers, so 5 out of 7 that have emailed me. This should make for an interesting week since we are way past the drop deadline and our policy is automatic F if caught cheating.

On a related note, it will be nice to get back into the swing of things. I have a result that might be publishable so I am keeping my fingers crossed when I meet my advisor later this week.

My field is statistics.

How was everyone elses Spring break?
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>>8772370
>Grades should be based on the objective test he turned in. You're confounding things by implicitly adding honesty to the mix.
So if a student turns in a good paper that was provably copied from the internet, I should give him an A on the assignment? After all, the objective essay he turned in was good, and I'm just mixing everything up by considering honesty.

>>8772402
>If you cause damage, you pay it back in full. You don't pay 20x the amount just because the other guy "wants to teach you a lesson". That's vengeance.
In practically every legal code from the Bronze Age forward, there are provisions for PUNITIVE as well as REPARATIVE damages, to provide a strong incentive not to steal. Hell, it's even in the Pentateuch! We have them today in our justice system.
>Newsflash you're not the fucking legal system!
Not THE legal system, but A legal system. Universities have disciplinary systems set up for student misconduct, and they're generally state/municipal justice systems in miniature (minus, of course, imprisonment etc.)
>You're there to educate people. You just failed to educate that "cheater".
I dunno, the concept of "if I cheat, bad things will happen to me" is a pretty useful lesson. Of course, it's a lesson everyone should know by the time they graduate high school, and which most people learn around the age of ten, but there are remedial classes for a reason.
>Why wouldn't he keep your grade in this case? He fucking earned it.
He fucking earned his punishment too, but you want to give him a pass.
>What danger does a fucking premed represent to you?
Have you considered the possibility that a premed who cheats his way through university might become a med student who cheats his way through med school? And that he might be literally putting patients' lives at risk? Fuck sake, think this through.
Not to mention what >>8772469 said; if a school tolerates academic dishonesty, it degrades the school's reputation.
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>>8765800
the people that work in administration in colleges are so incompetent that they wouldn't be able to hold an office job anywhere in the industry.

administration in academia is literally filled with the worst trash imaginable.
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>>8767683
the only TAs that do this are lazy shitheads and complete retards that should have never been admitted into a grad program.

yeah, it's annoying if someone does something completely different than the answer key, but you should still try to follow along and see if it makes sense. if you can't even do that then it's obvious you're beyond lazy, and a moron on top of that because that exam will just come back to you unless the student likes losing points for no reason.
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>>8772930
>yeah guys you fucked up so now you can all forget about getting into any school for like a decade
>we've blacklisted you, it'll disappear in 7 years tho
>you can come back when you're in your 30s tho

goddamn, if you tried this in my country your school would be sued to hell and back. not even banks get away with that kind of shit here...

>essentially ruin some student's lives
>"its not punishment"

i know attorneys who could convince a judge that you're doing bigger damage than you're remedying... but again, i don't live in america.
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>>8772303
don't go to shitty unis

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>drumpf hates scien-
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>>8771347
Yeah but that makes sense
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>>8771998
> buying into the Russian interference meme

Meanwhile, Obama was using US intelligence agencies to try to swing the election for shillary.
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>>8772877
> Obama was using US intelligence agencies to try to swing the election
[citation needed]
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>>8772911
Have you been living under a rock or something? It's all over the news.
http://www.foxnews.com/politics/2017/03/23/potential-smoking-gun-showing-obama-administration-spied-on-trump-team-source-says.html
>>
>>8772925
LOL

>http://www.breitbart.com/big-government/2017/03/21/fox-news-pulls-judge-napolitano-after-claims-obama-used-british-spies-wiretap-trumps-phones/

Not even Fox News buddy.
https://www.youtube.com/watch?v=8Uuk7Hkzf8c

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Is there an area of knowledge and research about politics/ social life/ how people think? I mean down to nitty gritty mathematical concepts in the same sense as something like economics attempts to do. Basically away to understand our world in a fairly rational way.
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>>8772980
>but it's based on the false assumption that people always act rationally
didn't economics have this exact same problem?
>>
>>8772980
Game theory has wider applications than that. Evolutionary biology is a good example.
>>
>>8772986
yes game theory has wider applications
but OP only asked about people
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>>8772991
Fair enough.
>>
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>>8772926
Cattle herding.

So one time while riding a motorcyle down the road a friendly crack decided to make my day, when I was changing lanes my wheel got caught in the crack and in half a second I hit the ground to my immediate left hitting my head(with my helmet) and left side of my body, and I don't remember hitting the ground part, but the next half second the forward force kept dragging me and the motorcycle about 30yrds, I weighed 220 ibs and my motorcycle weighs 385ibs and I was going about the 40 mph, how much force would ya'll say my body recieved when it impacted the concrete road?
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>>8772924
Wrong. You assume that the only force his body feels is the change in momentum from the vertical fall, but it also feels the change in momentum from the friction between him and the ground slowing him down to a stop.

I.E. You're retarded.
>>
>>8772932
Bike was on top of me for a second and the height of motorcyle was 3.5 ft, and yes it did land on top of me.
>>
>>8772924
the forward velocity upon striking the ground would create and additional force of static friction
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>>8772963
>>8772944
The static friction vector would be both lesser and perpendicular to the force of impacting the ground. So, its the same as falling while stopped as far as maximum force imparted to his body is concerned.

Checkmate athiests.
>>
Cause the way i also remember it is my handlebar immediately turned all the way to left so when I landed on the ground i and my motorcycle were perpendicular instead parallel to the road when going forward, my motorcycle whent farther than I did, and I barrel rolded a couple times after the initial impact.

I only got the cold 4 times a year for the last 10 years, I havent got any other disease on said period of time.

Am I really healthy?
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>>8771560
I'm sick like every month
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>>8771536
not only have i never been sick in my entire life, my presence, my body actually eradicated the cancer this thread gave me
>>
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>>8772869
good post
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>>8772461
Given that you're always a different Korean girl you never keep an illness, so yes.
>>
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>>8771536
I get sick maybe once every 2 years, and I don't live particularly healthy either. You have AIDs.

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ITT: Dumb pseudo-science terms that let you know someone is a brainlet.

I'll start.

>internet of things
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>>8772234
You're stupid af. Stop believing every clickbait article you see. Driverless cars today instantly fail in bad weather. They won't be widespread until 2040 and that's being generous.
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>>8772339
>Driverless cars today instantly fail in bad weather.
Actually, no, they fail when the road (not the markings, the road shape itself) is not discernible or the sensors are caked with thick mud.
"Can drive by itself except in catastrophic conditions" is pretty good already. Technically human drivers shouldn't be driving in those conditions either, they're simply too pigheaded to recognize that and give up. Driverless cars are in fact better in some weather conditions where their sensors provide a clear advantage over human eyeballs.
>>
>Whomst
>>
>life
>>
>>8770724

oh allah it's true, haha oh wow

("igon value problem" yall wanna look it up)

>>8771211
does he get abused in pop stuff?

What went wrong?
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>>8772907
This.
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>>8772903
In defense of Bill Nye: he is a genuinely great guy that at no point has claimed to be some cutting edge scientist. Note that the other three quotes are just self-aggrandizing dickish condescension, while his really could be taken out of context. All he is saying is that he is SKEPTICAL of the (entirely undecidable) claim that reality isn't "real".

Bill Nye has always been an educator, and a damn good one at that. He has done wonders for the RIGHT kind of popular science: promoting general scientific literacy, habits of mind, and curiosity in a wide population. So many kids grow up watching his videos and have seen cool experiments and watched the scientific method in action because of it.

These other fucks are who your post is about. Intellectuals who try to act like they are on the tier of the left column in terms of contribution, and spew condescension at people while promoting the WRONG kind of pop science: haughty teenagers who will rattle on about quantum physics but can't solve free body diagram problems in two dimensions
>>
>>8772907
umm correct me if im wrong but didnt lawrence krauss derive the theory of dark energy? i mean sure einstein made it first then withrew it , calling it a place holder. but decades ago the guys on the left would be the ones youd be calling "celebrities"

days have changed and modern philosphers cant be the ones deriving science since the development of quantum mechanics. the world has been found to be non deterministic and lab work is what is needed to persure further
>>
>>8772956
>>days have changed and modern philosphers cant be the ones deriving science since the development of quantum mechanics. the world has been found to be non deterministic and lab work is what is needed to persure further

the day's have changed and it's not the philosopher's problems. philosophy and science have decoupled long before einstein's times but they still managed to have some sort of education in the classics and letters. mass education is producing technically knowledgeable people much at greater rates these days but the quality of mass education has been steadily declining at least in the US, with the biggest hits to the "useless" liberal arts topics, producing some scientifically knowledgeable people but also creating philosophically illiterate and a critically under-literate philistine society
>>
>>8772937
>This so much

Never understood why /sci/ has such a hatred for promoting science, when it's the only way that many of the world's uneducated gain any understanding of science.

Without a friendly and easily relatable way of promoting science to the public, people would continue to fear science and attack it out of ignorance

Looking for a non-meme answer
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>>8772306
>using an antibacterial soap everyday is not good.
Antibacterial soap is a meme. All soaps are antibacterial.

The ingredients added to "antibacterial" soap are used for things like killing bacteria on tissues too delicate for soap, or as a leave-on treatment or soak to continue killing bacteria for an extended time. They're only added to soap for marketing purposes.
>>
>>8772306
Well I don't actually use the antibacterial soap by them, but I can subscribe to their soap-free cleanser along with a witch-hazel astringent and a moisturizer after the shower. My face looks fifty times better than it did whenever I'd take showers almost every other day, because of just being lazy.

If you ask anyone who models how they have a clear face, then they'll tell you that they exfoliate, cleanse, use an astringent, and cap it off with a moisturizer every day; they also make sure that none of it contains alcohol and/or soap as the main ingredient.

I think people are misconstruing the belief of not washing your hair often as being told to not bathe often. Most models and people growing out their hair bathe every day, but they'll sometimes not wash their hair until it gets unbearably dirty, and this is only done to keep split ends to a minimum.
>>
>>8772530
I didn't notice no one mentioned exfoliation in the thread before this. It's extremely important for skin care, much more than the frequency of your showers or the decision to use soap.
>>
I stopped sham-pooing (and showering) after becoming NEET after high school. I stopped using soap after I quit being a wageslave. I shower twice a day with just cold water. I only use soap on my hands before cooking. Maybe this is unnecessary.
>>
>>8768277
>Looking for a non-meme answer

good luck, brother

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>godel's incompleteness theorems
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>>8772955
"The first incompleteness theorem states that no consistent system of axioms whose theorems can be listed by an effective procedure (i.e., an algorithm) is capable of proving all truths about the arithmetic of the natural numbers. For any such formal system, there will always be statements about the natural numbers that are true, but that are unprovable within the system.

The second incompleteness theorem, an extension of the first, shows that the system cannot demonstrate its own consistency"

No algorithm is capable of proving all mathematical "truths"


https://en.m.wikipedia.org/wiki/Gödel's_incompleteness_theorems
>>
>>8772955
Because there are true statements which you cannot prove are true.

Here, have fun.

https://en.wikipedia.org/wiki/G%C3%B6del%27s_incompleteness_theorems
>>
>>8772950
>It's saying math can't fully prove itself
That's not what its saying. That would be circular logic anyway.
>>
>>8772969
How is it not saying that? And what is it saying then?

Is statement A not the same as statement B?

Statement A: No algorithm can prove all mathematical statements

Statement B: Math cannot prove itself fully true
>>
>>8772969
That's exactly what it's saying.

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I have a theory that I'd like to run by /sci/: That dark matter does not exist. Rather, the universe is comprised fully of normal matter. Not matter that is "in our universe", yet still affecting "our universe" gravitationally.

We know that our normal matter comprises about 5% of the matter in the universe. What if the initial singularity that contained all the matter in "our universe" only contained 5% of the matter in the entire universe? Kind of like how a black hole exists in our universe as a singularity with a lot of matter around it. We don't know what would happen in a singularity that size, so is it sane to assume that maybe a singularity with the amount of energy as our universe would go bang? Well, we know it did at some point, right?

The other 95% of the universe not in the singularity would be pushed away from the Big Bang, perhaps allowing a sort of closed system for the "new"(our) matter. At some point, though, the gravitational pull of the 95% would start to pull towards the rest of the universe, which we know is homogenous, so everything would be seeming to move "away" from everything else as it is pulled to the surrounding universe.

This could explain the change in phase to accelerated expansion of the universe. Now I have to ask a question: Is there a "terminal velocity" for gravitational pull that perhaps the matter of "our universe" has not reached yet in relation to the surrounding universe?

Is this batshit crazy? I know that all our equations are based on the idea that all energy was inside the initial singularity.

https://en.wikipedia.org/wiki/Dark_flow
This is the idea that there is something "beyond our universe" pulling it.

There are a million implications if this is a reasonable theory.
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>>8772322
Is that a Gorilla?
>>
Where's the math bro?
>>
>>8772308
It could be there is an attractor outside the visible universe but if you imagine a 2d cross section, the matter would have to be distributed uniformly around the edge to cause repulsion in all directions. This would be a contradiction as the net pull would then be 0.

Also, dark energy and dark matter are completely unrelated as far as we know. We use dark matter to explain differences between visible mass and the observed speed of galaxies. This is unlikely to occur due to some non local effect.

Tldr your idea doesn't work
>>
>>8772808
>The matter would have to be distributed uniformly around the edge to cause repulsion in all directions
Am I wrong to think the universe is homogenous?
https://en.wikipedia.org/wiki/Cosmological_principle
>>
>>8772880
No.
It is. There's some speculation that there could be regions of space made only of anti matter or other exotic stuff, but on a large enough scale you could say that isn't an issue.

Anyways, my point was just that gravity is an unlikely candidate for dark energy because dark energy is pulling everything away equally in all directions.

If mass outside the visible universe were causing this, the force of gravity would have to be equal in all directions to pull in all directions. But then the gravity would just cancel out. So it's not possible that outside mass is responsible for the expansion we see.

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This animation hints at the complexity that emerges when points in 4D are linked together to create basic four-dimensional objects. The object shown here is the 4D equivalent of a cube, known as a tesseract. To create this animation, the tesseract was rotated in four dimensions, then projected into three dimensions.
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>>8772424

It's actually a 2D projection of a 3D projection of a 4D object.
>>
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>>8772413
wrong. We are capable of some n dimensions visualization in the mind. Took a long time but I can visualize a tesseract rotating and understand it as something beyond that projection. It is possible.
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>>8772415
you're an idiot.
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>>8772526
>visualize
vision is fundamentally 2d
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>>8772537
Pedantic wordplay. You are a weak mind.

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Post your questions that don't deserve their own thread in here.

Previous thread:
>>8748174

What methods other than the scientific method do people on /sci/ find useful to gather truths in various aspects of life?
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>>8772906
except its not defined at (a+b)/2 brainlet
>>
>>8771857
> doesn't all that squaring give you more solutions than were in the original equation?
Yup.
E.g. x=-2 is a solution to the degree-8 polynomial, but it isn't a solution to the original equation.

>>8771884
> So you have to just solve some horrendous polynomial
In this case, the polynomial factors to:
(x+2)^2*(x^3-2)^2=0
So you have x=-2 or x^3=2; the latter has three solutions (one real and a complex-conjugate pair). Only x=2^(1/3) is a solution to the original equation.

If you're restricted to the reals, then the terms inside the square roots must be positive.
3x^2-3>0=>x<-1 or x>1.
5-x^2>0 => -sqrt(5)<x<sqrt(5)
4x^2+8x+1>0 x<-1-sqrt(3)/2 or x>-1+sqrt(3)/2
Altogether:
-sqrt(5)<x<-1-sqrt(3)/2 or 1<x<sqrt(5)
>>
>>8772893
That actually sounds like great advice and I'll try it out. What would you suggest for getting through long technical readings? I'm studying physics and some of the chapters I need to read are long difficult to grasp, and I find it hard to focus on reading for very long before the anxiety gets to me.
>>
>>8772893
>>8772906
>>8772920
As I said I study math, but I've taken most of the undergraduate physics curriculum, so I have a sense of what you're talking about. It depends on what you mean:

If you are studying material, you shouldn't often be reading pages and pages consecutively. You should be examining the concepts conceptually, and summarizing long readings into the important bits. Some classes like to assign a ton of reading every lecture, and this can be a trap:

Lets say you are studying conservation laws and energy. You have 40 pages to read associated with one 75 minute lecture. The lecture might go something like this: a five minute discussion of previous topics and how they lead into this one, then an intuitive example of a "ball on a hill" followed by drawing a formal energy diagram that shows the relationship between potential and kinetic energy, and then a statement that energy is always conserved, and then progressively harder example problems with new concepts each time: one about a box sliding down a ramp in 2d, then addition of rotational energy to the discussion: maybe a flywheel being spun up by a falling weight, then addition of the concept that potential energy is "0 at infinity" for gravitational fields etc and a problem about escape velocity from Earth.

Now your notes would look something like this:

ENERGY: Energy is always conserved. <example of an energy diagram in 2d>. Applications: if we can quantify the energy something starts with and how that energy changes, then we can calculate other useful quantities about it: example: a ball starts 10m up at rest, then we can determine how fast it is moving when it has fallen 10m. <Example problems 1,2,3 from the lecture, with short notes on the side as to what is being introduced each time>

Pretty simple. Maybe 1-2 pages. But a 40 page reading is a huge amount of extraneous information compared to this lecture. It will probably feature a narrative style describing (1/2)
>>
>>8772920
>>8772958
What we are doing in a non-mathematical sense, why we are led here from previous topics, 8 pages of history and famous experiments, a page talking about energy conservation and some irrelevant nuances to it, a whole page devoted to one ball example that reiterates a ton of previous material and how it applies to the ball, then multiple more pages for the remaining examples including detailed sidenotes about the mathematical techniques used, and then 5 pages of conclusion including an appendix and a "review" section.

The trap is thinking everything in the reading matters. As a general rule, write down major definitions and theorems, and while you can read every corollary and subdefinition and example, you have no interest in them beyond having been exposed to them once.

Tl;dr try not to take readings too seriously because it is easier to learn by doing problems after being exposed to the material quickly than to read everything and try to understand it all. In addition, do readings parts at a time interspersed with the relevant pset sections.

Most of all, uncertainty and inadequacy is a part of learning. As a kid this is anxiety, later it becomes frustration or blase (high school), and as a continuing student, it will hopefully turn into "comfort in uncertainty": learn to recognize that stumbling sensation as the process of developing skill and aptitude within your own mind. You're still stuck in the anxiety phase, so your task is to push yourself to acquire comfort in uncertainty. Accept that you don't understand, then methodically go back.

Understanding and internalizing this was a turning point in my college career, intellectual development, and entire life. It's something most people will never achieve, because it is a long process and requires discipline and self reflection. But everyone who is professionally successful in physics or math has absolutely acquired this comfort.



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