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Archived threads in /sci/ - Science & Math - 233. page
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File: about goddamn time.jpg (98 KB, 681x720) Image search: [iqdb] [SauceNao] [Google]
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I've always believed most deeply that there was a reason for everything. This belief has been with me all my life despite encountering a ton of things that had no apparent reason whatsoever. The idea was that not knowing the reason didn't mean that there wasn't one; I was just currently ignorant of it.

I know how popular the idea that beliefs cause bias is, so when I woke up this morning my mind sort of jumped to the idea that that belief of mine might be causing problem for my cognition. I've probably avoided thinking a lot of types of things by holding...
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>>8191836
>What can or should I expect now /sci/?
If anything. Is letting go of a natural tendency expected to have any observable (or internally sensable) consequences or are intents of this variety not causative to cognition in first place?
>>
Come on /sci/. If you don't make a prediction you know someone else will, and you know that nine times out of ten it'll just end up being unfalsifiable platitudes. Any falsifiable hypothesis is better than no hypothesis at all.
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Why is OP such a blogposting faggot?

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How many chemicals exist? How many chemicals can there potentially exist? How many of these chemicals are psychoactive? Is it possible that there is some sort of super drug that we have yet to discover that is 100x as euphoric as meth?
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>>8190677
Infinite, infinite, infinite, probably not.
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>>8190677
Don't know, but likely finite.
Don't know, but near certainly finite.
Don't know, but with certainty, finite amount.
Very unlikely. The brain is a machine, and as it presently exists, it isn't likely capable of existing in a state of that sort. Terms like "100x as euphoric as" are also not very useful.
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>>8190677
Every "chemical" is a combination of set values interacting with one another in specific ways yada yada the point is, on earth we have the elements of the periodic table. If you wanted an answer, you would need to know the maximum affordability for size of a molecule. Also, if you're including solutions, the number will increase exponentially.
To the second part, the brain has a very specific structure, so there are not infinite molecules that could do what you are suggesting if there is a maximum molecule size. There very well may be, though. Maybe even 420x.

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What is it about math that drives people away? They take one look at an equation above arithmetic level and their minds just shut off.
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Symbolic thinking for mathematics develops habitually.
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Most people find it uninteresting and useless. Like if someone were to show you there spoon collection. That combined with the pretentious "being good at math means your smart" meme means they would rather not try, than try and fail.
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because it's completely useless by itself and thus unlearnable without first knowing 'what it can do'

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So like many others I grew up believing pic related. However a friend who's going through a bit of a health-food conscious phase (organic, raw) tells me otherwise, that milk depletes calcium from bones. And there's a couple of website supporting this claim. The problem is, they have the feel of Naturalnews.com and similar sites. Here's one of the main sites pushing this new way of thinking.

http://saveourbones.com/osteoporosis-milk-myth/

Any biologists in the house? This is nu-age bunk right?
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>>8195256
Everything that isnt organic bio glutenfree fairtrade non-gmo vegan food is bad for your health maaaan. Like seriously, I cant even. Wake up, xir
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>>8195256
>This is nu-age bunk right?
you only need to take one look at the url to answer that question
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>>8195256
-Cow's milk is for calves not humans.
-Human breast milk is for infants and children under 5 years of age.

If you are an adult who consumes milk products, you are fucking stupid.

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I have been busting my ass on my thesis, geology related. It has pasted my committee. Now the department head who is a soft geography science (don't ask me why or how he is in charge) is reviewing my thesis. I caught a mistake in a figure and emailed him the correct new image. He says he doesn't see the difference. He then procedes to email me the 1st half of my thesis. I am horrified. The bastard is resizing all the figures like an autist so there are no "white gaps". I need advice B. I need some advice on how to tell him he ruining my work and convince...
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>>8192822
why is he writing your thesis? tell him you'll resize them and make some changes and do it quickly
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OP here. He has also resized some other figures and I have not seen the damage on my results or conclusions section but I am worried that all my photomicrographs with scale bars are gonna look like "Fun-house" mirrors.
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>>8192822

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can /sci/ explains how the placebo effect works?
how it's able to cure disseases and cause what christians calls miracles?
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>>8195592
the mind is a powerful thing
since it controls so much shit, it can easily fuck your body intentionally and unfuck it depending on random shit
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Maybe it causes epigenetic changes that somehow rewire the nerves that are sending pain signals when they shouldn't.
Placebo pretty much only works on stuff like back-pain, migraines and the like. Vague conditions without a clear cause involving abnormal pain. It doesn't actually work against stuff like infections and cancer.
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>>8195592
>and cause what christians calls miracles?

Mr. Theologian sup.

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>he thinks he can reach human-level AI by 2025

will he do it bros?
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>>8194542
>>8194542

More specificity is needed on what constitutes "human-level AI". I too would like to know more. Maybe Turing Test Complete?
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>>8194542
Yes, though I think we'll have the first text-based human level AI much before then. Probably by 2018.

Visual processing is extremely difficult compared to linguistic reasoning.
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If he can, you can with certainty say someone else will do it first if they haven't already.

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Is emotional intelligence real?
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Intelligence is (usually) defined to be someone's ability to learn new skills (NOT emotions) quickly.
So no. If you're an emotional person, you're just emotional... "emotionally intelligent" is like saying "furiously exist". It doesn't have any meaning.
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>>8196112
no. it is a made up attribute to make people who are bad at thinking feel better.

what is true, is autism spectrum disorder. look it up if you want to learn some actual medical science
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No. I suppose you could consider it to mean someone's ability to read other people's emotions (at least I think that's how people traditionally use it), but the problem with that is it's entirely dependent on the people around them. If they happen to be similar to their peers they're going to be able to read their emotions. Unlike actual intelligence, it's a measure effected solely by outside influences (while real intelligence is something that's specific to the person who's capable of reasoned thinking).

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Sup /sci/. Doing some physics work when I come across this. Having a brainfart, I fail to recognize what I'm supposed to do. These are two separate fractions, correct? Is multiplication between the two fractions implied when there's no sign or parentheses?
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$\dfrac { a} {A } \dfrac {b } {B } \equiv \dfrac { a·b} {A·B }$
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>>8196049
no sign or sign, yes, multiplication is implied.
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>>8196049
>Is multiplication between the two fractions implied when there's no sign or parentheses?
Yes, just like every other situation in which two symbols are adjacent in undergrad math.

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What's at the edge of the universe?

Is the edge of the universe penetrable?

Does it even have an edge?

What's even the geometry of the universe? Is it spherical?
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There is no edge, it's infinite, and don't let anyone else tell you otherwise.

This is the problem with a finite universe, you can't imagine it. What's outside the edge, then what's outside of whatever that is?

It's illogical to think it's finite.
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>>8192480
Could you elaborate more?
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>>8192469
>What's at the edge of the universe?
Don't know.
>Is the edge of the universe penetrable?
Don't know if it can bridge like a typical physical space.
>Does it even have an edge?
Don't know.
>What's even the geometry of the universe? Is it spherical?
It's thought to be flat, which doesn't necessarily imply infinity of any sort.

Infinity...

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Share your lab stories. Here's mine:

First genetics lab. We need to rip the heads off from Drosophila pupae for their gigantic chromosomes. One girl with Aspergers starts crying and yells that she's going to quit because it's so wrong, fruit flies have freedom to live too. She lies down on floor and then hides underneath a table.

First biochem lab. The same assburger loses her mind because cheap Chinese plastic tubes melt in the PCR device. She starts crying and hides underneath the laminar. After 30 mins she starts to tell everyone about Aspergers, her hypothyroidism, how her feelings are completely justified etc. The lab assistant and lecturer sigh in despair.

Animal physiology lab. A small blood sample made her faint and cry. Frog decapitation and dissection makes her vomit and rage quit the course. The lab teachers are extremely patient, but she is constantly testing them with her stupid shit.

And after all this she specialized in animal physiology because "genetics has too much math".
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>>8180159
For the last one, someone really should have told her before she wasted time with that major that she would be dissecting dead things to study their insides. How expensive is this uni?
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>>8180166
10 000 € per year
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My only experience in lab as an undergraduate is that I don't generally trust my lab partners so I prefer to do the lab myself.
Inconsistencies that throw off results piss me off, and my partners usually want to finish in a hurry and leave before lab ends so I tell them to act occupied and let me type the reports and perform the lab, unless my partner has integrity to do it right the first time.... Sounds jerkish but I've been screwed by relying on lab partners before

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Can someone explain what the notation h'(x)->infinity as x->0- means based on this graph?

I would expect it the line to be going straight up if h'(x) is approaching infinity when x approaches 0 from the left?
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Is it to the right of 0 x is approaching infinity and to the left of 0 x approaches infinity? Of course, that's it, but have you ever seen it described this way? seems fucking returded
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>>8196712
the superscript tells you which direction the limit approaches from

0+ means you're coming in from the right (more positive side)

0- means you're coming in from the left (more negative)
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>>8196728
and so h'(x) going to infinity as x goes to 0- means that the graph approaches a vertical line as you approach 0 from the left

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I keep seeing all these magical 'POWER YOUR OWN HOME FREE TESLA GENERATOR INFINITE ENERGY AWAKED YOUR PINEAL GLAND FORBIDDEN KNOWLEDGE' on Youtube, and surprise surprise they all turn out to be bullshit.

So I figured I'd ask here, is there such a thing as a fancy generator that I could build and use at home?

By fancy I mean something that isn't basic like wind or solar.
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>>8196389
Yes
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>>8196389
>>8196390
Maybe
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>>8196389
>>8196390
>>8196392
No

>tfw coelacanth is actually invertebrate.

Damnit, science, are there any other fake vertebrates you neglected to tell me about?
>>
>>
>>8194341
I've opened this thread like 4 times trying to think of another one like that and failed every time.
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>>8193699
https://en.wikipedia.org/wiki/Coelacanth
>Phylum:Chordata
Pic Related

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I feel like I have some very important work to do, but I don't know what it is.

I know that once I figure out what I'm supposed to do I will excel at it..but I can't figure out what it is. I've been sitting here all day and no ideas came to mind. Anyone else feel the same?
>>
Maybe you are destined to sit for living?
>>
find out if gravitons exist like the standard model of the universe predicts
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I think I can understand OP. I always feel like I "should" be doing something to learn something new or useful on my own, but I'm too lazy to ever do any extra work and I can never decide on a topic that I want to study on my own.
The few times I'm ever successful is when I just pick a topic and run with it. I think the majority of the difficulty comes from deciding on and starting something. I guess I need more of a "just do it" kind of attitude.

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>be me
>in intro to physics class
>calc based classical mechanics
>after first week there are only 13 people in my class
>only 7 in my lab

So what gives /sci/? I know a smaller class is better for learning, engagement and building a relationship with the professor. But by the looks of it there is only going to be 3 people in an upper level class. Is physics becoming a meme degree? I also noticed it's a huge sausage fest.
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>>8196381
Calc Phys 1 is a high school course and maybe there aren't many students who need remedial education.

Or your university is a meme.
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>>8196386
fuck off eurocuck
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>>8196387

he is no eurocuck because in europe calc 1 is supposed to be known in uni or else yo can't enter and this is because we are better than others (murica)

So how do you all feel about the Juno spacecraft mission? What are you hoping the results will be?
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>>8196047
I hope we gather a lot of data on Jupiter's core, water content, and atmosphere. Also, some semi-decent pictures.
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>>8196047
>What are you hoping the results will be?
Pornographic closeups of the storm systems.
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>>8196069
>>8196047

Yeah I definitely wanna explore that cartoon girl's core if you know what I mean. Maybe poke a little too deep and see the water content flowing. Indeed taking some semi-naked pictures of her back to earth would be great.

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Hint it's multi stage
>>
i see loss
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I can't believe no ones done it I thought 4chan people were smart
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>>8195634
/sci/ is where retards go to act smart and smart people go to act like retards

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You find yourself in a situation where you have managed to produce a correct, constructive proof that P = NP by providing a polynomial-time algorithm for an NP-complete problem. Let's also say that this algorithm happens to have an extremely practical running time, say O(n^2).

Ignoring whether or not this is possible, what would be the 'right' plan of action to take in this situation? Such a solution would have an extreme effect not only on the academic sphere, but also on the life (and potentially safety and privacy) of people around the globe. Do you...
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>>8195552
sell it to the highest bidder
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>>8195570

Is that really the most intelligent option? A capable enough bidder could just then use your algorithm and a bit of social engineering to take that money back.
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>>8195552
you (d) talk to a professor to check it out and tell you why you're retarded

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>>8195270
>So now you don't understand GR, QM or geometry.
The balloon's surface is composed of finite points. It is not magic, it is a balloon.

>>8195271
>Ok, give me the reference frame where the universe is stationary and I will always be able to give you one where it is not.
I can think of no instance where the universe as a whole has changed its location in any spatial direction. Therefore it has undergone no motion,...
>>
>>8195283
>The balloon's surface is composed of finite points.
Defend this statemate. It can be representated in uncountably infinite real space, there's no reason to assign a finite number of points over an infinite.
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>>8195304
The balloon is a finite object occupying a finite number of the universe's possible positions. The universe does not afford infinite precision or infinite subdivision of space between two arbitrary points.

If the balloon exists in a vacuum that is otherwise the rest state and minimum excistation of its underlying fields, as you expand the balloon you're just distributing the excitation gradient of its components more widely. The balloon is not gaining new energy, nor does it gain new points. It just...
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>>8195315
(A finite range, and quantized state.)

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Hello. I would like to discuss the problem of developing AI with some experts if possible. Am a comp sci student and recently started an Algorithms course referencing Introduction to Algorithms by Cormen, second edition.

We had a session on few of Turing's papers a while ago and as I recall he considered the brain to be a finite-state machine and hence emulatable. I got not problem with this line of thinking.

The algorithm course however introduces NP complete problems that do not have a computational procedure that always give the efficient solution. This got me thinking that wouldn't a self dependant AI need to make its own algorithms? Does there exist an algorithm for algorithm designing with even partial emulation of human logic?

I understand self learning machines exist but don't they just copy what humans do? What happens when a new unknown situation arises?

Example of an NP complete problem from the book:
Given a central warehouse and a delivery truck. Find the most efficient route to deliver goods each day.
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>>8195273
Unfortunately, humans already taught them and built them almost everything they need. This isn't 1940 anymore. They are going to takeover.
>>
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Self bump. Anyone can participate or ask stuff.

To add to my previous point, isn't the need for a step by step procedure the result of sequential processing by computers at an hardware level? Are there different system designs available?

I think the brain uses analogous signals rather than discrete. This would explain its huge capacity and imprecision. Would an analogous computer be better equipped to emulate human logic?

>>8195305
Atm a human solves the problem I mentioned better than a computer if...
>>
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>>8195305
I wish popsci horseshit would leave /sci/.

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>yfw you realize all it takes is a couple drops of semen for a woman to LITERALLY grow another human being, bones organs skin hair teeth and all inside of her
Why is sexual reproduction so disgusting and horrifying?
>>
> because we don't need more information than a single strand of DNA to create human
apologize and never reproduce
>>
>>8194706
>all it takes

You do realize you must consume one baby's worth of raw material (actually more) to create a baby, right? The body is alchemy more than it is magic.
>>
>>8194706
>disgusting and horrifying?
Because it's like most other things in nature.

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Well, an old puzzle my father and I were trying to solve. It was a bonus question from my physics class last year but I can't remember the solution.

A skier of mass m is on a snowball of radius r. He begins to slide down the snowball, at what angle does he lose contact with the snowball?
>>
45 degrees
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>>8194615
360 degrees sempai
>>
GRAVITY IS PULLING HIM DOWN NO MATTER WHERE HE IS ON THE SNOWBALL, HE HAS NO INWARD ACCELERATION, HE LOSES CONTACT AT 90 DEGREES IF NORTH IS 0.

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so I've been thinking about how fiction other than star wars rationalizes the idea of lightsabers actually working
the usual problem that arises when thinking about how to make one that actually works (using just a high-powered laser for a blade, not contained plasma) is "the blade will never end"
but is it impossible to contain a laser beam? could you not potentially build some kind of containment unit to cap the blade, with a photovoltaic system to reduce energy loss?
>>
>>8194606

IF you could get a high enough power laser, you could have a small bar run parallel to it, with a lens on the top. The lens(or set of lenses) would be concave(toward the laser) and refract the light, spreading out the beam over a large area so it is virtually harmless.

Of course, nobody wants a metal beam on their light-saber. But that's the only practical way I see.
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>>8194636
the laser blade literally is extendable. Why not just have the laser surround the metal bar, and the energy is obviously so concentrated you can't see through it, so the bar in the center is concealed? As it extends, the blade grows in length
>>
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>>8194705
picatar relatid

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>all processes are reversible
Is this the worst science meme?

If you write something on a paper then burn that paper and disintegrate the remains with a blast of water no amount of effort will ever retrieve what was written on that paper.
>>
>>8194110
>big crunch
>>
>>8194110
>all processes are reversible
Whoever says this should kill themselves, then reverse the process.
>>
>>8194110
I really don't think they meant physical processes

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How close are we to immortality and putting brains in robots really? I find very mixed answers about both.
Hypothetically, what would become of us if we just kept breeding and we all were immortal? Would we phase out breeding almost entirely and the same few billion people would continue living forever?
Sorry if this sounds like x-tier, uneducated garbage, but I'm actually curious about it.
>>
>>8193947
>How close
When you will be at the end of your life, we will start to make the richest of us immortal. You won't make it.

What are you expecting from /sci/?

>we just kept breeding and we all were immortal
Human hunting seasons
>>
>>8194129
Well, I moreso meant I find mixed answers when I'm doing my own studying on the subject.
A lot of contradictions and baseless conjecture both ways
>>
Not very. Realize the brain is dependent on a lot more from the body than just nutrients and oxygen. If you think otherwise, then cut out your thyroid, castrate yourself, and cut the adrenal glands off your kidneys. Then remove ~70% of your liver and induce scarring where your CSF drains.

Also, remove all your adipose cells, see how readily you can tell you're hungry. Also, adipose makes estrogen, which men need to an extent as well.

Etc. It's a ways off, if viable at all.

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Does phenotypic variation exist between humans? If so, What role does it play in modern day evolution?
>>
Yes.
>>
You'd have to be blind not to notice phenotypic variation between humans.
>>
>>8193810
No all 7 billion human beans look exactly the same.

Are you retarded?

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Hello /sci can you give me any recommendation of books for basic electronics, im studying electronic engeeniering
>>
>>8193513
The Art of Electronics - Horowitz and Hill
>>
>>8193519
This. Heard it's the best biik around for electronics.
>>
>>8193513
Our name is /sci/, get it right, newfag.

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fixing co2 and methan (number 1 greenhousegas)
by fixing overpopulation. helping the nature to rebuild.

1) send rocket to asteroid-belt
2) rocket has robot who equips asteroids with little rocket engines
3) send asteroids to earth and let it go down on india & co

pros:
+ they would never figure out what or who hit them
+ maximum devastation
+ its bio

cons:
?

any cons /sci?
>>
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no not my anime
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>>8193426
If you can leave the rest unharmed, then yes

Nuclear winter is not good for animals and plants (food)
>>
>>8193426
Who would man our call centres and provide technical support for retards?

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hey /sci/

got a bug here i am not sure what it is, found a few crawling on a wall

asked about bugs here a few years ago so hoping you can help again!
>>
Put a magnifying glass on it under direct sunlight to see it better.
>>
>>8193404

it's wallbug
>>
>>8193404

it is a penny you dimwit, just let it go and it will fall from the wall

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