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How could the celts between 200 BC and 300 AD make a caludron of almost (97%) pure silver?
From a scientific point wouldn't this require a more advanced technology than the one they had?
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>>8303715
Aliens confirmed
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>>8303715
They didn't make it, a more skilled civilisation made it for them.
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they could have just found some crystalline silver
Or one guy was mad good at cooking off slag and just didn't write a 10 Things You NEED To Know About Smelting Silver Before Christ Arrives click bait article
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>sciencefags think pic related came from a literal wolf
why do sciencefags believe in the satanic lie that is evolution?
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>>8303689
b8
/thread
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people domesticated dogs in the stone age
Is psychology a flyover science?
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>>8303683
I would pay more and tolerate two layovers to fly a route that circumvents it completely
Psychology has already been strip mined of all useful development. Its only purpose now is commercial, like studying consumer response to marketing and product presentation
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No. It's a science that is so complex (the brain) that it is hard to study, because the brain is extremely complex.
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>>8303847
>this thing is very complex and therefore difficult to study
>therefore, we will embrace whatever some political deviant comes up with when he's on a coke binge and have that be our dogma for decades
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Does /sci/ think that we need better pictures of Titan ? By the way Titan is one of the only satellite where you can find liquid on the surface even if it's not water.
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>>8303605
I think that we need better pictures dude it's a cool satellite of saturne
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>>8303605
We need better pictures of all of the solar system's objects.
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Best picture of Titan
Anonymous
http://www.centauri-dreams.org/?p=36248 2016-08-28 15:23:26 Post No.8303585
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http://www.centauri-dreams.org/?p=36248 2016-08-28 15:23:26 Post No.8303585
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http://www.centauri-dreams.org/?p=36248
Anonymous
2016-08-28 15:23:26
Post No. 8303585
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>An international team of researchers has announced the detection of “a strong signal in the direction of HD164595
>Working out the strength of the signal, the researchers say that if it came from an isotropic beacon, it would be of a power possible only for a Kardashev Type II civilization. If it were a narrow beam signal focused on our Solar System, it would be of a power available to a Kardashev Type I civilization.
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http://www.nothing-dreams.org/?p=36248
An international team of people who need grants has announced the detection of nothing in the direction of HD164595
By fudging numbers and falsifying the strength of the nothing, the researchers say that it would be possible for such a nothing to be coming from a Kardashev Type II civilization. As this sounds too far-fetched, they added the more reasonable possibility of this nothing coming from a Kardashev Type I civilization.
The team also makes an appeal to the general public to "not let us strave [sic] we need help please".
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>>8303614
You could have just said it's very unlikely that this is actually an alien signal
thanks for your valuable input
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>>8303639
You could have not shitposted this thread.
is there anyway to manually alter a human's reward pathway to systematically produce dopamine every 5mins without the use of illicit drug?
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Knock-out edit the gene that codes MAO-B enzyme.
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>>8303527
Listen to music.
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>>8303527
>without the use of illicit drug
That's retarded. Psychoactive drugs are exactly what you'd use to alter your brain chemistry. Your question is like asking how to open the locked door to your house without using the key you have in your hand. Also:
>every 5mins
You would just get used to it very quickly and then you'd feel the same as you did before starting this process.
Hello all, can someone explain to me why the definition in the picture is so?
The definition of a dense set is that given a proper subset A of X, its closure is the entirety of X.
My assumptions:
A closure cannot add open parts of X to A, since the 'objective' of a closure is to make the complement of A open
i.e. the objective of a closure is to take all the boundary points of A and include them in A.
That means that for A closure to equal X, A must already have all the open subsets of X, namely the interior and exterior of A, and also possibly part of the boundary. But the only way A can contain its exterior is if its exterior is null!
my conclusion: the exterior of a dense subset is null. But then how is A a proper subset of X??
Now look at the attached picture. It says that A is dense in X iff all nonempty open subsets U of X are such that U intersection A is not null.
But if A contains all the 'open' part of X, surely any open subset of X is contained in A, not just intersecting?? For an open subset of X to be intersecting A but not contained in it means that it is a union of a subset of Int(A) with a subset of Ext(A). But as I previously wrote, it doesnt make sense for Ext(A) to not be null!!
Can someone please clear up my confusion? I hope my question wasn't too convoluted.. I will try and explain any unclear points.
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>>8303403
It means everything is close to the set
duh
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>>8303411
I can't see the contradiction from this. Can you give me an example in (X,Tp) ?
>>8303413
what does "everything is close to the set" mean?
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If A is a proper subset of X, then the density of A in X means that the closure of A in X is X. If we then take any open set U in X, suppose its intersection with A is empty. There is then some x in X-A such that it has a nbd not meeting A, so x is not contained in the closure of A, and thus the closure is not X and A is not dense in X.
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I'm going to a lecture tomorrow, with one of the chief scientists from the Louisiana LIGO observatory. What questions should I ask?
Also, gravitational waves general.
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Ask about future candidates for wave sources. Also ask if any advances in sensitivity are planned. Kind of the same question.
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ask if NASA will restore co-operation with ESA on eLISA
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>>8303289
Could multiple LIGOs, assuming perfect accuracy, triangulate the origin of any sound even if multiple sounds were occurring at the same time?
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the meaning of life:
you are a point of view. you are not a set of particles but rather the entire universe (every point of view is like its own universe and particles are just singularities). nothingness is also a point of view. experience is like a language in that godel's incompleteness theorem applies to it. time is basically the result of writing "this sentence is false" in this language (or if you're an engineer, feeding a NOT gate's output into its input). each point of view (including nothingness) requires other points of view to get around godel's incompleteness theorem (to hold their hidden variables to not contradict itself). "qualia" is another way of saying "the laws of physics" so if they change the laws of physics change. your point of view and its qualia are basically random and it's strongly implied that this isn't your first roll. there is no god or free will. if you define free will as requiring nondeterminism you are just saying dice have free will.
tl;dr: something exists instead of nothing because even "nothingness" would still require a viewer to not contradict itself and beyond that when alice asks "why am i alice and not bob?" the answer is randomness.
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there is something, but it still doesn't matter in the end. such is transience.
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>>8303155
to elaborate further on why nothingness needs a viewer: it's the same reason a particle can't both hold its velocity and location or why you can't draw a moving point on a piece of paper. information can't hold state.
you can draw a self feeding NOT gate on paper but that's just information. a subject (viewer) is needed to give the thing a state. both "information" and "state" are actually the same thing but can't exist in the same universe because of encoding issues and this results in the object/subject split.
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>>8303155
the meaning of life is to reproduce and not die m8.
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Has there ever been a scientific study into why people have the ability to drive cars, despite it being unnatural and nothing like anything we have evolved to do?
I mean just think about what you're doing the next time you merge onto the highway between 2 cars.
You're calculating your own speed, you're calculating the speed of two other cars, you're calculating the size of your own car, you're calculating the size of the space in between the two cars, you're moving your foot to press the pedals and moving your hands on the wheel in such a way that you will intercept the gap in between the two cars.
I mean the first issue with this is that humans never evolved to travel at 70mph. How can they handle making decisions at that speed?
The second thing is, while it can be argued that spacial awareness is something we learned as primates jumping from tree to tree, where we had to work out distance from branch to branch. This is completely different, you're calculating and making decisions based on the size and abilities of your car, not your own body. And then you're somehow able to instinctively know how to operate the controls of said car to complete your goal.
So how is it that humans are able to do advanced trigonometry in their heads in a millisecond without thinking?
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>>8303090
Projectile tool use?
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>>8303090
You've obviously never driven a car
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>>8303090
>despite it being unnatural and nothing like anything we have evolved to do?
We have though, it's simply movement, something we're good at.
Maybe 100MPH is our limit, it's not actually that fast. Perhaps if we somehow magically evolved with cars we'd be able to drive easily at 1000mph
Anonymous
Could you theoretically redshift a gamma ray into a radio wave? 2016-08-28 07:42:52 Post No.8303076
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Could you theoretically redshift a gamma ray into a radio wave? 2016-08-28 07:42:52 Post No.8303076
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Could you theoretically redshift a gamma ray into a radio wave?
Anonymous
2016-08-28 07:42:52
Post No. 8303076
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>>8303076
Not just theoretically.
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>physics
>>>/x/
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>>8303594
you've got a problem with physics faggot?
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Time doesn't exist. Why do people think that time is a tangible object?
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>Time doesn't exist
k m8
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>>8302924
Convenience and because perception makes a very convincing illusion
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>>8302924
>one of the fundamental laws of the universe doesn't exist
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Why is so little money put into researching ageing and developing interventions to slow down and ultimately reverse the damage accumulated by the body over time?
We spend trillions globally on treating the diseases of ageing, but very little on trying to understand the biological processes involved.
How can we convince people to devote a larger proportion of their charitable giving to medical research institutes which focus on biological ageing - and how can we convince governments to allocate a larger proportion of their research budgets (or, indeed, to significantly grow their research budgets) to ageing?
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memento mori.
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>>8302910
the answer is you're wrong
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>>8302947
>memento mori.
if the nineth lion ate the sun
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webm thread
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>freezing light waves
>not freezing the air around it
Ok
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>>8302780
NOOOO, what movie is this?
I must watch it.
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>>8302787
The Flash TV series.
Who were the greatest physicists excluding Einstein and Newton?
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J. Robert Oppenmemer
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>>8302710
in order of importance:
me
tay tay
terrence tao
watson n crick
a literal pile of dog shit
feynmann
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Based Lambert doesn't get enough cred