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/sci/ Science & Math

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Most viewed threads in this category

Genetic Recombination

4 more posts in this thread. [Missing image file: Rec.png]
How can you predict what a kid will look like? Pic related is an example. I was convinced that you could predict ZIdane's son would have a massive, long jaw, and damn was I surprised.
28 more posts in this thread. [Missing image file: math-calculus-diagram-DHD.gif]
Why is Calculus so hyped? I just got my textbook in the mail and I've already learned a lot of this shit in physics. From what it looks like, Calculus is basically the physics of a graph. Am I correct? Or does shit get crazier.
11 more posts in this thread. [Missing image file: image.jpg]
Can we have a general Quantum Physics/ Mechanics thread? I feel like nobody here really talk that much about it.


28 more posts in this thread. [Missing image file: Untitled-1.png]
/sci/, I want you to explain to me the main difference between the guy on the right, and the guy in the left. Both of them have the same testosterone levels, yet the one on the left will have a beard at 14, massive wrists, big bone structure, hairy body, while the one on the right will have a late puberty, little to no body hair, and a small bone structure with tiny wrists. Yet, they have similar hormone levels. So why do they look so different?
41 more posts in this thread. [Missing image file: whyDoesItSpin.gif]
I've been watching some Feynman lectures and I have a question. He mentions the spin of an electron emitted by nuclear decay. Is the spin direction caused by the Lorentz force?
15 more posts in this thread. [Missing image file: 558px-electron-shell-092-(...).png]
Any nuclear engineer(ing student) here? I'm considering getting a degree in it. Got a couple of questions: What level of math do you use/need? What programming is involved? Is there an industry standard language?
13 more posts in this thread. [Missing image file: Riemann_surface_log.jpg]
The picture is the Riemann surface of the logarithm http://en.wikipedia.org/wiki/Riemann_surface http://en.wikipedia.org/wiki/Complex_logarithm#The_associated_Riemann_surface Embedded in \mathbb{R}^3 as in the picture, if I go counterclockwise from the point over (x,y)=(1,0) one level up, the path goes upwards along the 3rd component and so it must be longer than 2\pi. The logarithm at this point is 0. The derivative of the logarithm is 1/z and at a distance with absolute value =1, if I integrate along the counterclockwise path I should get log(-1) = i*length of the path The actual result is i*pi, implying that the path is in fact flat. Where am I wrong?
2 more posts in this thread. [Missing image file: 2.gif]
>New math professor >First day of class, they ask who the math major are. >Several people raise their hands, out comes a huge bag of candy. >Today, the entire class receives a "link to the ebook" >Mega.co.nz Based professors?
7 more posts in this thread. [Missing image file: .999=1.png]

Upper Palaeolithic Siberian genome reveals dual ancestry of Native Americans

1 more posts in this thread. [Missing image file: jD7QS8BsnMo.jpg]
The origins of the First Americans remain contentious. Although Native Americans seem to be genetically most closely related to east Asians there is no consensus with regard to which specific Old World populations they are closest to. Here we sequence the draft genome of an approximately 24,000-year-old individual (MA-1), from Mal’ta in south-central Siberia, to an average depth of 1×. To our knowledge this is the oldest anatomically modern human genome reported to date. The MA-1 mitochondrial genome belongs to haplogroup U, which has also been found at high frequency among Upper Palaeolithic and Mesolithic European hunter-gatherers and the Y chromosome of MA-1 is basal to modern-day western Eurasians and near the root of most Native American lineages. Similarly, we find autosomal evidence that MA-1 is basal to modern-day western Eurasians and genetically closely related to modern-day Native Americans, with no close affinity to east Asians. This suggests that populations related to contemporary western Eurasians had a more north-easterly distribution 24,000 years ago than commonly thought. Furthermore, we estimate that 14 to 38% of Native American ancestry may originate through gene flow from this ancient population. This is likely to have occurred after the divergence of Native American ancestors from east Asian ancestors, but before the diversification of Native American populations in the New World. http://www.nature.com/nature/journal/v505/n7481/full/nature12736.html#ref4
18 more posts in this thread. [Missing image file: college room.jpg]
>http://www.npr.org/blogs/thetwo-way/2014/02/04/271648691/watch-the-creationism-vs-evolution-debate-bill-nye-and-ken-ham Americans: why? Why do you consider this to be "science"? Why would any culturally advanced country even think about having a debate on such topic? Why a debate in the first place, since what-you-consider-to-be-science is based upon critical thought, abstraction and proofs? I believe it's appaling. I managed to watch the first 20 minutes of the debate, then I was about to smash my keyboard against the wall so I stopped; but really is this what science has come to? Are we still allowed to call it "science"? From what I could see (this is not the first debate I had the unfortune to watch), you turned it into a series of jokes and a bunch of trivial, hackneyed stale sentences. It's no more who comes up with the best proof, it's no more who KNOWS the subject to its core: instead, it's who seems more appealing to the general (and, as such, ignorant) public who makes his/her way into the big universe of pop-sci stars. Panem et circenses, Romans used to say, and they were right: science lost all its value because someone deicided it's "cool" and therefore it has to be lovely prepared to be fed to culture-hungry teenagers.. Sure, we are lucky and we know better sources for our knowledge, but when I confront myself with the sad fact that many many many people believe to know something about "science", whereas they know SHIT, I feel as if they are raping my beautiful world. To all the people who intentionally turned knowledge and, as a result, wisdom, into a consensus-eating beast, I say: FUCK YOU. >pic unrelated, but gives me the feels so why not
23 more posts in this thread. [Missing image file: Spock,_2265.jpg]
/sci/, it's /lgbt/, I need your help. My boyfriend's mad at me for suggesting that if the infinite multiverse ideas of possibilities exist, that there would be a universe where we were both, (or just one of us was) straight. Is there some science thing I could point to get my point across better? That we could be straight despite the 'being born with it' thing? Please help me I don't want to lose him.

Job Oppurtunities for BSc

51 more posts in this thread. [Missing image file: IMG_20131101_123226.jpg]
What kind of job oppurtunities are there for someone graduating with a BSc in Physics? I'd like to work for at least a year to pay off undergrad loans before attempting grad school. >Pic not related, on my mobile
17 more posts in this thread. [Missing image file: bleuhabanero.jpg]
Since posting to sci is fairly slow, because this board is dying of cancer, at what rate, and for what duration, would a troll have to post nonsense to this board before no one would ever intentionally visit it again?

Average Male Penis Size

6 more posts in this thread. [Missing image file: image.jpg]
I have read that the average penis size is about 12 cm and circumference being about 4 inch is this true? on the internet everybody seems to have at least 8 or 9 inch is it possible to have the circumference of a coke can? the rap-singer jay-z is rumored to have such
23 more posts in this thread. [Missing image file: images.jpg]
Is it so far-fetched to believe that humans are the apex of all living organisms in the universe? I mean, why not?
8 more posts in this thread. [Missing image file: Ship.jpg]
Hello all. What is the function of the circled part on ships? Is it some kind of hydrodynamic feature or does it house equipment?
17 more posts in this thread. [Missing image file: The Veritable Clavicles o(...).png]
You should be able to solve this.
12 more posts in this thread. [Missing image file: 1369768591625.jpg]
Why do physicists accomplish so much more than mathematicians? Most of mathematics as we know has been worked out by famous physicists. Like Newton, who invented the integral. Seriously, mathematicians, are you even trying?
157 more posts in this thread. [Missing image file: 20140205_024629.jpg]
Hello men. First of all, sorry for may bad englilsh. i've learned english on the internet so please go easy with me. Today I'm here to explain you the universe, the atom, the prime numbers, the dark law of the exitence. How? Easy, math. This is how I call "Draw of the Universe". Can u see it? I can explain :)

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