If Hubble can make photos of galaxys 13.2ly away, is it ever gonna be possible to look back 13.8ly away and 'see' the big bang? |
- If Hubble can make photos of galaxys 13.2ly away, is it ever gonna be possible to look back 13.8ly away and 'see' the big bang?
- AskScience AMA Series: I'm Carlos Zarate Jr., and my research team at the National Institutes of Health Intramural Research Program works on new, fast-acting therapeutics for treatment-resistant depression, bipolar disorder, and suicidal thinking. AMA!
- What was/is the actual damage from plastic microbeads?
- Why is the Milwaukee protocol not recommended?
- Why does Turner syndrome have consistent symptoms when the X chromosomes should be redundant?
- Do people with lots of kids have better immune systems due to constantly getting sick?
- Why are parasites considered true living organisms while viruses are not?
- Where did all the water on asteroids come from?
- How do fertility/sperm tests work?
- Is there a limit on the number of radio telescopes that may be networked together?
- Were there wild pigs or were they breed from domesticated boars?
- Is Tungsten Carbide an alloy?
- If solar sails are possible, why EM Drive isn't?
- Is this a reasonable simulation of tension across a hanging rope?
- Questions about behavior of electrons in an atom?
- How does angiotensin 2 affect GFR?
| Posted: 13 Nov 2018 01:21 AM PST And for all I know, there was nothing before the big bang, so if we can look further than 13.8ly, we won't see anything right? [link] [comments]  |
| Posted: 13 Nov 2018 04:53 AM PST My name is Carlos Zarate Jr., and I am the Chief of the Experimental Therapeutics and Pathophysiology Branch and the Section on the Neurobiology and Treatment of Mood Disorders at the NIH's National Institute of Mental Health (NIMH). In 2016, more than 1 in 20 American adults and 1 in 10 adolescents experienced at least one major depressive episode. Depression can massively affect people's lives, removing the pleasure they receive from their hobbies and social interactions and reducing their ability to work. In the most severe cases, individuals who suffer from depression tragically choose to end their lives - suicide was the 10 th leading cause of death overall in the U.S. in 2016, claiming nearly 45,000 lives, and it is the second-leading cause of death among Americans ages 10 to 34. In fact, in that year, there were more than twice as many suicides in the U.S. as homicides. The medications currently available to treat depression typically take up to six weeks to start having full effects. To improve treatment and accelerate symptom relief, my research focuses on developing new medications for this often-debilitating condition, along with identifying new potential drug targets and objective measures called biomarkers that yield information about how a patient is responding to treatment. In recent years, my lab has extensively investigated and assessed the effects of the anesthetic drug ketamine on depression and suicidal thoughts. Many of the patients in our trials have had marked and rapid responses to ketamine, sometimes within a single day or just a couple of hours. We have also made major headway in determining how ketamine produces such dramatic changes so quickly. However, because ketamine can have serious side effects, we are working to identify ketamine-like drugs with similarly rapid effects but fewer problematic side effects. For more information on my work, check out this story and video on the NIH Intramural Research Program (IRP) website: https://irp.nih.gov/our-research/research-in-action/from-despair-to-hope-in-hours. You can also read my investigator profile at https://irp.nih.gov/pi/carlos-zarate. If you or someone you know is in crisis and needs immediate support or intervention, call the National Suicide Prevention Lifeline at 1-800-273-8255. Trained crisis workers are available to talk 24 hours a day, 7 days a week. Your confidential and toll-free call goes to the nearest crisis center in the Lifeline national network. These centers provide crisis counseling and mental health referrals. You can call for yourself or on behalf of a friend. If the situation is potentially life-threatening, call 911 or go - or assist a friend to go - to a hospital emergency room. Lives have been saved by people taking action. AskScience Note: As per our rules, we request that users please do not ask for medical advice. Please see above for specific actions to take in the event of a situation. [link] [comments]  |
| What was/is the actual damage from plastic microbeads? Posted: 13 Nov 2018 06:20 AM PST |
| Why is the Milwaukee protocol not recommended? Posted: 13 Nov 2018 01:15 AM PST The Wikipedia page about rabies states the following three things. About the disease itself, it says:
About the Milwaukee protocol, it says two things. First, it states
and it concludes by saying
Can someone explain to me how these three statements are logically consistent? The way I see it, if you get symptoms of the rabies, you have two options. One is certain death, one is death in 92% of cases. Now I know option 2 isn't particularly good, but it's better than option 1, right? Isn't "not recommending" the protocol basically saying "just let these people die"? Isn't some result, no matter how marginally good, better than certain death? [link] [comments]  |
| Why does Turner syndrome have consistent symptoms when the X chromosomes should be redundant? Posted: 13 Nov 2018 02:23 AM PST |
| Do people with lots of kids have better immune systems due to constantly getting sick? Posted: 12 Nov 2018 09:56 PM PST |
| Why are parasites considered true living organisms while viruses are not? Posted: 13 Nov 2018 12:30 AM PST Also would there be some parasites that are not considered true living organisms while some are? To me it seems like both a virus and a parasite operate in the same way and going off the definition of what a true living organism is I feel like both of them do not meet all the standards required. [link] [comments]  |
| Where did all the water on asteroids come from? Posted: 13 Nov 2018 01:38 AM PST This post on /r/science got me wondering about the origins of water in the universe. The post itself seems to imply that nebulae naturally form water, thus over time creating asteroids loaded with it. But is that the generally held belief of the science community, or is there a more popular theory? [link] [comments]  |
| How do fertility/sperm tests work? Posted: 12 Nov 2018 10:05 PM PST Would it be possible to test sperm/fertility at home? [link] [comments]  |
| Is there a limit on the number of radio telescopes that may be networked together? Posted: 13 Nov 2018 01:28 AM PST I'm just curious because it seems like covering a desert with a million, 1m diameter telescopes would give you the most sensitive radio telescope on the planet. Is there a reason no one has done this yet? [link] [comments]  |
| Were there wild pigs or were they breed from domesticated boars? Posted: 13 Nov 2018 01:17 AM PST |
| Posted: 12 Nov 2018 12:25 PM PST I've always thought an alloy is a base metal mixed with another metal(s)/non-metal(s) to change physical properties. I've asked a few people if Tungsten Carbide is considered an alloy. I've got some wild answers:
I'm not an expert with material science. [link] [comments]  |
| If solar sails are possible, why EM Drive isn't? Posted: 12 Nov 2018 04:42 PM PST Title, pretty much. I mean if all photons have momentum, what is the difference? Edit: as far as I understood, electromagnetic waves from the source (heated wire in bulbs, induction coils) are propagating in EVERY direction, making overall momentum conserved at 0. [link] [comments]  |
| Is this a reasonable simulation of tension across a hanging rope? Posted: 12 Nov 2018 04:35 PM PST Hi! I was debugging some game physics/kinematics and noticed something I found interesting: the tension across my hanging rope was assuredly not equal across its entirety, which goes against one of the few things I remember from my physics classes a decade ago. However, the simulation seems to match most of the rope characteristics that I can think of having observed in real life (it's actually uncanny; I hate it), so I'm reexamining my understanding of physics. Attached is a screen grab; the red circles represent the tension at each point (the radius of each circle is equal to "tension", which is a variable in the engine with a magnitude and no real units). Is this pattern reasonably representative of what I would expect to see if I were to measure across a real rope with a... tension...ometer? Note: I haven't seen any posts like this, before, so I'm not sure if I'm allowed to do this; I notice that media posts are disabled, but I'm not sure if that means that they're not allowed, or if they're disabled to weed out low-effort spam. I'm assuming the latter (and also assuming that this isn't a low-effort question); please let me know if I'm wrong! [link] [comments]  |
| Questions about behavior of electrons in an atom? Posted: 12 Nov 2018 12:27 PM PST Hello I've been learning about Quantum Physics recently, it's super interesting, and it seriously has left me with more questions than answers. Crazy to think that matter is probabilistic on the most fundamental level. I've been thinking about some of the features of the quantum mechanical model of the atom for a little while, and I've tried to combine all questions that I had in my head over the past month into one post. I'd really like to get some intuition on this mind bending topic (full disclosure: contains a lot of questions beginning with "what exactly"). First off, what exactly does it mean for an electron to behave both as a particle and a wave? I know that by calculating the de Broglie wavelength of an electron we get a wavelength that is pretty significant at the atomic scale, but what exactly is the 'wave' that we are referring to here? What exactly is the quantum wave function? Is it a mathematical representation of the probabilities of the electron's position at any given time, or is it referring to the electron as a physical wave in space? What do people mean when referring to an 'electron cloud'? Is it the probability of the position of a single electron, or the electron 'wave' being spread throughout the atom? If it's a physical 'wave', what exactly is it made of, and does it mean that the charge and mass of the electron is distributed across the wave? These are some of the questions I have for now. Just for context, I have a pretty intuitive understanding of Bohr's model of the hydrogen atom, and a basic intuitive understanding of spectroscopy (The photoelectric effect, transition of an electron across energy levels after interacting with a photon of a certain frequency, emission and spectra, etc.). I really don't get the intuition behind electrons treated as 'standing waves'. Thanks for your time! [link] [comments]  |
| How does angiotensin 2 affect GFR? Posted: 12 Nov 2018 06:40 PM PST Im finding the notes in my lecture rather contradictory at the moment and I hope someone can clarify it for me. Note 1: GFR can be regulated by Angiotensin II. When renal blood flow is low, Ang II is released by RAAS pathway and vasoconstrict afferent and efferent renal arterioles decreasing GFR. Note 2: Decrease in BP triggers release of renin which will ultimately produce Ang II through RAAS. This will then lead to increase blood volume due to vasocomstriction of peripheral arterioles-> blood pressure rises, which causes an increase in renal perfusion and therefore an increase in GFR. I understand note 2, as RAAS is stimulated to increase BP through increasing Blood volume. This means that there is more perfusion to kidneys and hence GFR will increase until renin is inhibited. Hence note 1 seems contradictory to me. Please someone clarify!! Thanks in advance [link] [comments]  |
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