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/sci/ Science & Math

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Most viewed threads in this category

47 more posts in this thread. [Missing image file: ]
Does it fuck up physics or does it not?

Infinite semen for all

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So women lose their reproductive abilities most typically in their early 50s while men are pretty much able to impregnate someone even on their dead bed. The question is how this is an evolutionary advantage when we take the following factors into consideration? 1) Older fathers produce offspring that often has either mental or psychological disabilities. Daily Fail also reports that they are more "ugly" and "live longer" 2) Y chromosome has a high mutation rate and is highly susceptible to environmental influences meaning that since Y chromosome is all about balls and sperm, their male offspring may be infertile. 3) Defective chromosomal combinations rise with the age of father. Trisomy on the 23rd chromosome may be common. If natural selection was at play and made it possible for male bodies to invest in reproduction at any age it poses either neutral or virtually no advantage to males and actually thwart their chances to pass on their genes successfully. So what gives?
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Cut my life into pieces
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He Who Does It For Free decided to delete the last thread for no reason, so here we go again: Is the super smart sperg just a meme? All the smartest people I've ever known were handsome frat kids. The spergs just play video games during lecture and get Cs.
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You may say what you want, Pluto is a planet. And so are the trans-Neptunian spherical objects.

Academic snobbery thread

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I'm sorry, is that supposed to make sense?
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hey /sci/ lets talk about math jobs for those of us who have tread down the applied math path. we'll take economics, statistics, physics, and comp sci in our conversation too. what's popular these days? what are you currently doing? what do you want to do? post your age/degree/school/job >22, applied mathematics, Berkeley >interning at a bank in SF doing statistical stuff. (quant) although trying to get into software engineering, i feel thats where the fun is.

Some Questions

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Hello, what I have here are a mix of philosophical questions i have congnized during our deep thinking sessions in class, where we sit in silence and ponder quandarys of the universe. Feel free to answer any you think you might know. 1. If the universe is infinite, Earth must be at the center of the universe and the Bible was correct? 2. If the universe is infinite, why is the night sky not lit up completely by stars? 3. If the universe is not infinite, how did the big bang happen in the first place? 4. If evolution exists, then why is earth not overrun by trees as big as sky scrapers sucking up all the sunlight and water? 5. If time is relative, then why do we all age at the same time? 6. If time is relative, then why is light speed a constant and absolute, when light also has its own time? 7. If genes are hereditary then why are some black children born white with red hair? 8. If time is the 4th dimension, and 4D is a degree higher than 3D, then why does it behave as 2D (forward, back)? 9. If nothing can escape a black hole and there is a black hole in the center of our billions-year-old galaxy then why has it not consumed everything already? 10. If time travel into the past is impossible, then how is time travel into the future theoretically possible when the future is some other future's past? 11. If schrodinger's cat is both alive and dead, then how come when you open the lid the cat is always alive? 12. If intelligence is hereditary and everyone started out with 100 IQ, then how do we get popular sci geniuses like numberphile and michio kaku? 13. If scientific method is pure and absolute, then why do we need peer review? 14. If light is a particle and a wave, then why do we never see tidal waves of light in the sky? 15. If no religions have a base in reality, then how did we think of them in the first place? 16. If scientists are left brained and artists are right brained, then what about an artist who paints science? Possibly more to come

Dreams and Ambitions Thread

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What are your aspirations, /sci/? I hope to do research in Molecular Biology. I want to study aging and perhaps negating its deteriorating effects through something like cell regeneration. My dream is to live forever and see as much scientific progression as I can.

Amateurs work

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The first ten prime numbers are 02, 03, 05, 07, 11, 13, 17, 19, 23, 29... Is there a prime number when turned around (the 1st digit becoming the 2nd and the 2nd the 1st) it's still a prime? For example 13, changes to 31, which is a prime. Are there any other primes like this? Is this problem known?
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How does one find the critical region for an ABX test, i.e. a hypothesis test where [eqn]H_0: \quad p>0.5[/eqn] [eqn]H_1: \quad p=0.5[/eqn] Where p is the probability of determining correctly an audio file X from a selection of audio files A and B upon listening. I'm capable of testing with the hypotheses reversed, since the probably of guessing correctly just adheres to [math]B(n,0.5)[/math], but I've no experience of this case. I suspect it is of relevance to confidence intervals, but haven't the background to know.
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5/5=1 4/4=1 3/3=1 2/2=1 0/0=1 prove me wrong. pro tip: you can't
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Anyone else have high intelligence but inconsistent or all around shitty memory?
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why do we have orgasms /sci/? pic unrelated
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what is the big bang?
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Interested in getting an opinion from people who are scientifically literate on having a discussion about race. I'm not from /pol/ so this isn't about joos or anything, but I've found myself recently wondering if the differences between racial groups is genetic. I understand that it's a controversial topic which makes it difficult for the scientific community to openly discuss and research these things, which is why I'm curious to know the personal opinions from people who work in these fields. I mostly found myself interested in this from the somewhat recent news articles that had discussed the mixing between us and neanderthals, which had stated that the only group left who hadn't possessed these inherited genes were sub-Saharan Africans. I'd like to believe that we were all similar and that the differences between races was cultural and environmental forces, but for geographically isolated pockets of humanity to be removed from one another for tens of thousands of years to end up being equal just sounds too good to be true. Am I wrong for thinking this? Whenever I try to read or research these things on my own I usually just wonder about how politically biased the data I'm reading is. Are there any good books or reading material on this subject that is objective and reliable? Just how conclusive would you say we are on having definitive answers for this inquiry?
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Can any mathfags help me figure this out? I've always wondered this. What's the probability of all four suits of aces being face up and not in the deck at the start of Solitaire?
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Erik Demaine >son of MIT professor >child prodigy >father home schooled him in math, science, and art from a young age. >bachlors age 14 >phd age 20 >MIT professor age 20 >currently age 35 >43 page CV why do we even try
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James Watson selling Nobel prize 'because no-one wants to admit I exist' fucking kill me http://www.telegraph.co.uk/news/science/11261872/James-Watson-selling-Nobel-prize-because-no-one-wants-to-admit-I-exist.html
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Hey /sci/, I'm posting this thread because there's been a "smoking isn't bad for you the government is lying" meme going around on this board for some ridiculous reason. Here are some peer reviewed articles for all you smoking "truthers" out there Dangers of smoking http://ije.oxfordjournals.org/content/38/5/1175.full " The magnitude of the excess lung-cancer risk among cigarette smokers is so great that the results can not be interpreted as arising from an indirect association of cigarette smoking with some other agent or characteristic, since this hypothetical agent would have to be at least as strongly associated with lung cancer as cigarette use; no such agent has been found or suggested." Dangers of Second Hand Smoke http://www.ncbi.nlm.nih.gov/books/NBK44330/ If you disagree please post some articles/studies so that we can take the time to read them and tell you why they're right/wrong. By the way I'm a smoker, I just refuse to have my head up my ass like some people here. Pic source: http://pathol.med.stu.edu.cn/pathol/listEngContent2.aspx?ContentID=714






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