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Sunday, July 17, 2022

How did elephants evolution lead to them having a trunk?

How did elephants evolution lead to them having a trunk?


How did elephants evolution lead to them having a trunk?

Posted: 16 Jul 2022 05:50 AM PDT

Before the trunk is fully functional is their an environmental pressure that leads to elongated noses?

submitted by /u/avdolian
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Does the universe as a whole have an orbit?

Posted: 16 Jul 2022 09:38 PM PDT

I know it's expanding- but does it have a rotation? Our planet orbits our sun, which orbits our super massive black hole… it seems like rotation is the standard. So does the universe as whole have a spin? And if not why?

submitted by /u/AnselmFox
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Does geology play a part in showing the average temperature of the Earth in a certain time period, like the chemical makeup of the rocks? Or is there more to it in determining geologically what the climate was like in the past?

Posted: 16 Jul 2022 02:09 PM PDT

Had someone mention in another thread that we have historical data on temperatures obtained by geology studies that shows the climate currently doesn't match with the general trend we'd expect to be naturally occurring, so I'm curious as to if there's something geologically that shows the Earth's average climate in comparison to now, and how that shows it's much warmer now than it should be by natural progression.

submitted by /u/QuothTheRaven713
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Do peoole in comas have cycles like sleep/wake for brain activity or is a general muted brain activity the whole time?

Posted: 15 Jul 2022 07:32 PM PDT

Does hot weather bother insects?

Posted: 16 Jul 2022 06:41 AM PDT

While I find it too hot to do anything, the insects seem to be busy as always, especially the bees on the lavender. Does the heat have an influence on them?

submitted by /u/klompje
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Elephant tusks are modified upper incisors, Deinotheriidae of the elephant order are modified lower incisors. Is this likely a case of convergent evolution, fulfilling a similar purpose in different way, or a varied expression of a shared genetic change?

Posted: 16 Jul 2022 02:20 PM PDT

I'm not entirely sure the best way to word this question. Would the large size of the incisors be because of a shared large incisor set of genetic changes, or rather the large lower incisor developed independently of the large upper one.

submitted by /u/ajifoster321
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Why are planets almost perfectly spherical?

Posted: 16 Jul 2022 07:59 AM PDT

Why are there no odd shaped planets, or planets shaped like cubes etc?

submitted by /u/AimForYaBoat
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How does JWST receive information such as temperature, atmospheric composition, mass, etc.?

Posted: 16 Jul 2022 12:15 PM PDT

Based on NASA, WASP-96b has water. But how did we find that out from JWST? Like, all we're receiving is the emitted light from the celestial object? How do we know anything beyond its visuals??

submitted by /u/Glass_Alpaca
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How do telescopes, on Earth, take pictures of the space with long exposures?

Posted: 16 Jul 2022 09:29 PM PDT

People often say "picture with x hours of exposure" to capture images of the space. Since we are constantly rotating, how do you "fix" the telescope / camera for the long expose to a galaxy, the sun, or whatever is in space?

submitted by /u/Furita
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Why is an inclined U-tube manometer more accurate than the normal one?

Posted: 16 Jul 2022 07:02 AM PDT

Why is mad cow/CJD transmissible to humans, but deer chronic wasting disease and scrapie is not?

Posted: 16 Jul 2022 01:45 AM PDT

How do scientists schedule time with the JWST Telescope?

Posted: 15 Jul 2022 06:11 PM PDT

I'm assuming it's an appointment thing, but I'm just curious if anyone knows how the process works?

submitted by /u/big_brown_mounds
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How does optimizing an aircraft for stealth affect aerodynamics?

Posted: 15 Jul 2022 07:47 PM PDT

If JWST only took 6 months to get 1 million miles to its final operating area, why is it unrealistic to make repairs?

Posted: 15 Jul 2022 07:40 PM PDT

Was Deinosuchus basically just a modern crocodile in big or does it have biological differences from modern crocodiles?

Posted: 16 Jul 2022 09:49 AM PDT

How hard does the wind blow on Mars?

Posted: 15 Jul 2022 08:03 PM PDT

Is a destructive windstorm on Mars (like the fictional one one that creates the plot situation in Andy Weir's novel "The Martian") plausible, considering the thinner Martian atmosphere? Does the weaker Martian gravity offset the thinner atmosphere by allowing the wind to be more effective in blowing things about?

submitted by /u/spikebrennan
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Is there any scientific evidence that consciousness is the result of quantum phenomena occurring in the brain?

Posted: 16 Jul 2022 07:13 AM PDT

Friday, July 15, 2022

Is there a reason your own "young" bone marrow couldn't put in storage for an immune system "restoration" when you are older?

Is there a reason your own "young" bone marrow couldn't put in storage for an immune system "restoration" when you are older?


Is there a reason your own "young" bone marrow couldn't put in storage for an immune system "restoration" when you are older?

Posted: 15 Jul 2022 07:48 AM PDT

It seems a reasonable hypothesis that a portion of the "problems" with an aging immune system come from aging stem cells in your bone marrow.

Obviously bone marrow extraction is very painful, but other than that hurdle, is there some reason I am not seeing that storing your own bone marrow on LN2 for later wouldn't be a way to restore the "youth" of your immune system later on in life?

submitted by /u/Natolx
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How single propeller Airplane are compensating the torque of the engine without spinning?

Posted: 15 Jul 2022 03:06 AM PDT

Is there such thing as having resistance and/or immunity to some diseases due to a specific blood type like AB or O positive?

Posted: 15 Jul 2022 06:45 AM PDT

AskScience AMA Series: We are Cosmologists, Experts on the Cosmic Microwave Background, The Cosmic Web, Dark Matter, Dark Energy and much more! Ask Us Anything!

Posted: 15 Jul 2022 04:00 AM PDT

We are a bunch of cosmology researchers from the Cosmology from Home 2022 conference. Ask us anything, from our daily research to the organization of a large, innovative and successful online conference!

We have some special experts on:

  • Inflation: The mind-bogglingly fast expansion of the Universe in a fraction of the first second. It turned tiny quantum fluctuation into the seeds for the galaxies and clusters we see today
  • The Cosmic Microwave Background: The radiation reaching us from a few hundred thousand years after the Big Bang. It shows us how our universe was like, 13.8 billion years ago
  • Large-Scale Structure: Matter in the Universe forms a "cosmic web" with clusters, filaments and voids. The positions of galaxies in the sky shows imprints of the physics in the early universe
  • Dark Matter: Most matter in the universe seems to be "Dark Matter", i.e. not noticeable through any means except for its effect on light and other matter via gravity
  • Dark Energy: The unknown force causing the universe's expansion to accelerate today

And ask anything else you want to know!

Those of us answering your questions tonight will include

  • Shaun Hotchkiss: u/just_shaun large scale structure, fuzzy dark matter, compact objects in the early universe, inflation. Twitter: @just_shaun
  • Ali Rida Khalife: u/A-R-Khalifeh Dark Energy, Neutrinos, Neutrinos in the curved universe
  • Benjamin Wallisch: u/cosmo-ben Neutrinos, dark matter, cosmological probes of particle physics, early universe, probes of inflation, cosmic microwave background, large-scale structure of the universe.
  • Niko Sarcevic: u/NikoSarcevic cosmology (lss, weak lensing), astrophysics, noble gas detectors
  • Neil Shah: /u/neildymium Stochastic Inflation, Dark Matter, Modified Gravity, Machine Learning, Cosmic Strings
  • Ryan Turner: /u/cosmo-ryan Large-scale structure, peculiar velocities, Hubble constant
  • Sanket Dave: /u/sanket_dave_15 Early Universe Physics, Cosmic Inflation, Primordial black hole formation.
  • Matthijs van der Wild: u/matthijsvanderwild quantum gravity, quantum cosmology, inflation, modified gravity
  • Luz Ángela García: u/Astro_Lua dark energy, reionization, early Universe. Twitter: @PenLua.

We'll start answering questions from 18:00 GMT/UTC on Friday (11pm PDT, 2pm EDT, 7pm BST, 8pm CEST) as well as live streaming our discussion of our answers via YouTube (also starting 18:00 UTC). Looking forward to your questions, ask us anything!

submitted by /u/AskScienceModerator
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Why/how do benzodiazepines and Z drugs/sleeping pills cause damage when used long term?

Posted: 15 Jul 2022 02:18 PM PDT

Is there any evidence that the strains of Covid prevalent in the US this summer tend to produce milder, shorter symptoms?

Posted: 14 Jul 2022 04:10 PM PDT

The reports of the illness I read in 2020 were typically along the lines of "holy shit that was awful!" and this summer, I get much more muted reports. Does the large-scale data collected by public health reflect my own personal/anecdotal impression? Also, is there data providing any sign that rates of mortality, and chronic, post-infection complications are reduced this summer?

submitted by /u/frank_mania
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If you are infected by Covid and produce natural antibodies, will occasional exposure to Covid ensure regular production of antibodies?

Posted: 15 Jul 2022 01:41 PM PDT

Not sure if I worded the title correctly, but I was wondering how antibodies and resistance to Covid works. Take, for instance, my experience with the virus…

  • I was vaccinated in August 2021.
  • I was infected by Covid-19 in October 2021. No hospital visit or monoclonal treatment required.
  • Antibodies are said to be good for 90 days.
  • I chose not to get any boosters.
  • I have not been as "safe" as one could be, and have been in largely unmasked crowds on occasion. I have been to stores, out with friends, on vacation, etc. — always following Covid guidelines, but when given the option not to mask up, I have chosen not to.
  • Luckily, to my knowledge, I have not been infected by Covid-19 a second time.

If your body produces antibodies after infection, is it possible that continued exposure to Covid would ensure your body continues to produce antibodies?

Why would continual exposure to Covid not act similarly to a booster?

submitted by /u/Azrael351
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What is the most exciting, realistic thing we can/are hoping to learn about the Universe through the James Webb telescope?

Posted: 15 Jul 2022 06:30 AM PDT

How are plants in greenhouses pollinated?

Posted: 15 Jul 2022 01:23 PM PDT

e.g. tomatoes, cucumbers. Do they bring in bee hives?

submitted by /u/TerrificFyran
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How old are the pillars of creation?

Posted: 15 Jul 2022 10:57 AM PDT

I'm trying to find out more about celestial nebulas and ai read that the pillars of creation may already have been destroyed at their location 7000ly away, but how old are they?

It doesn't say anything about how long they've been swirling about for, neither on Wikipedia, nor on their NASA website. Is it something we can't say for sure?

submitted by /u/platypodus
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How do we know that a 3rd or 4th booster is helpful?

Posted: 15 Jul 2022 04:10 AM PDT

Do we have data to backup saying that a 4th dose will reduce hospitalization for someone under 50? Are the memory B and T cells no longer active? I am so confused by the messaging from the thought leaders because I thought that part of the immune system had long term memory

submitted by /u/GetnLine
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How reliable is the DNA molecular clock?

Posted: 15 Jul 2022 06:42 AM PDT

I was reading the rise and reign of the mammals by Steve Brusatte, and in it he says we can calculate species divergence by looking at the DNA, and calculating how long that much difference from each other must have taken given DNAs rate of change.

How true is this? Is the rate of change the same in all animals/bacteria/etc.? Wouldn't the average age of reproduction of a species change this or no?

submitted by /u/SomeAnonElsewhere
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What is the link between the way the brain converts visual perception into a language representation?

Posted: 15 Jul 2022 06:45 AM PDT

If a non-blind person sees a given familiar object (e.g., a dog on the street), they immediately "know" what that object is, even before the word describing the object (e.g., "dog") in a given language "appears" in consciousness.

Is it understood why this delay occurs and what the link between the brain's ability to perceive a given object, and then recall its lexical term is? In a broader sense - where and how does the link between vision and language occur in the brain?

submitted by /u/iliicho1
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Why does COVID produce neurological symptoms and is it common for viruses?

Posted: 14 Jul 2022 11:23 PM PDT

I've wanted to ask this question since the pandemic began.

I don't remember hearing of many viruses that cause neurological systems (like loss of scent/taste) but I'm not a biochemist or virology expert.

submitted by /u/Equal-Explanation222
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(Geology) Could the North and South American continents have remained separated?

Posted: 15 Jul 2022 05:48 AM PDT

North American and South American continents remained separated until 3 million years ago, when Panama formed, uniting the two continents. This then resulted in migration of animals from North America into South America, causing some of the South American as well as sea animals like Megalodon to die out. I was wondering if it was possible for the two continents to never unite, thus some of the strange ancient animals could have survived longer, possibly until modern day?

submitted by /u/stanthefax
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Ok so I’m no scientist here and I hope this isn’t a stupid question but if the JWST can see so far deep into space then could we theoretically use it to map the surface of a lot of planets that are relatively close to us? I’m not saying we should I’m just saying is it possible?

Posted: 14 Jul 2022 10:14 PM PDT

Why do some mammals move their nose/nostrils when they breath?

Posted: 15 Jul 2022 11:47 AM PDT

As comparison, humans have no movement associated with the nose when they breath. How are animals/mammals different? Do they have muscle responsible for breathing other than the ones in their chest?

submitted by /u/Tigalopl
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How many stars exploded in order to create the Carina nebula?

Posted: 14 Jul 2022 06:14 PM PDT

I just saw this post: https://reddit.com/r/jameswebb/comments/vysbxk/in_the_highresolution_image_of_carina_the_size_of/

And it made me wonder. How many stars exploded to create this nebula? Or was it formed through some other process?

Given how large this is, it's hard for me to imagine that one star could create something like this?

submitted by /u/filipehenrique
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How can an electric sparker ionize air with such low voltage?

Posted: 14 Jul 2022 08:32 PM PDT

According to google the piezoelectric sparkers used for things like barbeque lighting have a voltage of around 800 volts, while air has a breakdown voltage of ~30k volts/cm, yet an electric sparker can still easily create an arc over half a centimeter of air. How is this possible?

submitted by /u/justacalcstudent
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Did proto-bears have long tails?

Posted: 15 Jul 2022 03:24 AM PDT

Is there in the fossil record any bear ancestor with a long tail?

submitted by /u/Tesfidian
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Are there multiple independent measurement of the universe’s age?

Posted: 14 Jul 2022 03:26 PM PDT

I understand using redshift data to back out when the Big Bang occurred. Can we instead use Cosmic Microwave Background (CMB) data to determine the universe age, without using redshift data?

submitted by /u/Pandagineer
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How does drying pasta actually work scientifically?

Posted: 14 Jul 2022 06:29 PM PDT

So from my understanding, commercially dried pasta is dried using hot air and then cool air somehow to remove moisture. But my question is how this works, like on a chemical level. Like how does this not just bake the pasta? If I made pasta at home and tried to dry it, it wouldn't end up the same as the theoretically everlasting dry pasta that you get at the grocery store. What's actually happening to the pasta when it dries?

submitted by /u/btqb
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Thursday, July 14, 2022

Do humans actually have invisible stripes?

Do humans actually have invisible stripes?


Do humans actually have invisible stripes?

Posted: 13 Jul 2022 07:18 PM PDT

I know it sounds like a really stupid question, but I've heard people say that humans have stripes or patterns on their skin that aren't visible to the naked eye, but can show up under certain types of UV lights. Is that true or just completely bogus? If it is true, how would I be able to see them? Would they be unique to each person like a fingerprint?

submitted by /u/Severe-Criticism3927
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How is a mosquito proboscis physically capable of puncturing human skin?

Posted: 13 Jul 2022 01:44 PM PDT

Human skin should be way too dense and strong for something so small and fragile like a mosquito. How is this possible?

submitted by /u/ForestManJ
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[Medicine] Would a child born without parts of their limbs, e.g. no phalanges from amniotic band syndrome, still have phantom sensations the way an adult who has lost a limb would have?

Posted: 13 Jul 2022 06:50 PM PDT

Saw an x-ray of a baby without fingers from amniotic band syndrome and was curious. Personally I couldn't find research papers or other info on it. Thank you!

submitted by /u/Gorilla_Boombox
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In TV shows, there are occasionally scenes in which a character takes a syringe of “knock-out juice” and jams it into the body of someone they need to render unconscious. That’s not at all how it works in real life, right?

Posted: 12 Jul 2022 07:09 PM PDT

Is the integer assigned to Kepler objects of interests random, or is there a system ? (for example, the star KOI-718, is the 718 assigned as a random integer?)

Posted: 13 Jul 2022 07:50 PM PDT

can humans be born with cancer?

Posted: 13 Jul 2022 10:02 PM PDT

Is it possible to get close enough to a galaxy so that it's bright for the human eye, yet far enough that you can see it's full shape?

Posted: 13 Jul 2022 10:21 PM PDT

Since telescopes compress the focal range astronomically, wouldn't it be impossible to see galaxies as they appear in images? I guess another way to put this is, I'm thinking that at any given planet in the universe, discounting any close objects, the night sky will always be dark with tiny twinkles. I can't imagine being close enough for it to be visible without being "in" the galaxy. Is this right?

submitted by /u/koleslaw
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How can radiation cause burns?

Posted: 13 Jul 2022 06:55 AM PDT

I wouldn't guess it transfers much heat so why does it cause skin "burns"?

submitted by /u/allahyokdinyalan
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What is the difference between an accent and a dialect?

Posted: 13 Jul 2022 06:44 PM PDT

How come some things melt and some things dry before burning?

Posted: 13 Jul 2022 07:45 PM PDT

What is the difference between NMN and βNMN?

Posted: 14 Jul 2022 03:23 AM PDT

When astronomers say that "space is expanding," does that just mean that the things in space are moving away (say, from 3 to 7 cm on a ruler), or does it mean the unit length itself is being distorted (it's still 3 cm, but centimeters themselves are now longer)?

Posted: 12 Jul 2022 06:15 PM PDT

What is the density of the Carina Nebula?

Posted: 13 Jul 2022 07:13 PM PDT

In a James Webb photo thread, someone posted that the Carina Nebula has a density of a few atoms per cubic meter. This seems off to me, as this is close to the average density of the intergalactic medium of one atom per cubic meter, which is much less than the interstellar medium average density of one atom per cubic centimeter, which is much less than the average density of a planetary nebular (100-10,000 atoms per cubic centimeter). But I can't find any information on the web to help me understand this better.

submitted by /u/thunk_stuff
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No one answered my previous question, here is why I want to know if we can tell if particles are still entangled without disrupting said entanglement?

Posted: 14 Jul 2022 02:38 AM PDT

Two reasons actually, first, how do we know they are still entangled from just one end? And does the knowing disrupt the entanglement?

So if we have two entangled particles and we send one out to orbit Jupiter (or anywhere far away) on a spaceship, can the people on the ship know if the particle is still entangled without disrupting the entanglement and without communicating at all with the people holding the other particle on Earth?

What if we had the tech to send sets of 26 entangles particle pairs on the ship, for simple example we send 3 sets of 26 entangled particles, and designate each pair in each 26 set a letter of the alphabet, then the people on earth interrupted the pair, in the first set of 26, with the designation of the letter Y causing it to disentangle so the people on the ship would know that we disentangled the letter Y pair. Then the second set the people on Earth caused the pair designated letter E to disentangle, and then the third set they disentangle the pair designated letter S, have we not just communicated FTL?

I'm a stupid monkey so just tell me why.

submitted by /u/Nine-Planets
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If I warm up a sandwich, would the energy needed to heat it up be equal to amount of energy needed to accelerate that sandwich to achieve same root-mean-square speed of its molecules?

Posted: 13 Jul 2022 08:01 PM PDT

Alternators convert kinetic energy into electrical energy, where does the energy go when the circuit is broken?

Posted: 13 Jul 2022 11:14 AM PDT

An alternator in a car is connected to a battery charging system : the spinny motion, magnets and copper, charges the battery, and some noise and heat is generated.

A cable between the alternator and battery is cut : the battery does not charge. What happens to this generated energy? It can't be noise/heat/light.

Energy can't be created or destroyed so where does this kinetic energy go?

submitted by /u/Muttywango
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Would it be possible to use the James Webb Space telescope to look at planets in our own solar system and see them in more detail or through a thick atmosphere to their surface?

Posted: 13 Jul 2022 05:52 PM PDT

What does AdS/CFT correspondence really tell us about the physics of gravity?

Posted: 13 Jul 2022 04:46 PM PDT

My understanding of math/physics is formally at an undergraduate level, so I apologize in advance if my questions are confusing or not very well formulated.

I've watched some videos about the holographic principle and how it was the attempts to solve the so-called black hole information paradox that lead to the development of string theories and the holographic principle. Ultimately this culminates in the correspondence between Anti-de Sitter spaces (a model of the universe under general relativity) and conformal field theories (i.e., quantum field theories). In the video here, the presenter tells us two things: 1.) That this correspondence leads to a "natural" theory of quantum gravity, and 2.) that interactions (between quantum particles?) on the boundary of the mathematical object's surface correspond to the emergence of gravity within the volume. However, he tells us that this isn't applicable to our universe, because anti-de Sitter spaces assume a negative curvature on the space-time metric, while as far as I understand, in reality it is zero (i.e., a Minkowski space-time).

So my questions are twofold: what quantum information is the problem here, and in need of conservation; are they things like spins and energies, and why does this lead to the holographic principle? Secondly, what is being said about the actual physics going on between quantum field theories and gravity with regards to this strange mathematical object?

submitted by /u/dieEhrevonGrayskull
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Do strong bases saponify the phospholipids in your skin?

Posted: 13 Jul 2022 07:05 PM PDT

Yeah that's about it. Google didn't show much

submitted by /u/MRHalayMaster
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Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology

Posted: 13 Jul 2022 07:00 AM PDT

Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology

Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...".

Asking Questions:

Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists.

Answering Questions:

Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience.

If you would like to become a member of the AskScience panel, please refer to the information provided here.

Past AskAnythingWednesday posts can be found here. Ask away!

submitted by /u/AutoModerator
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is there a limit on how far back in time we can see with a telescope?

Posted: 13 Jul 2022 04:26 AM PDT

I've heard about how the JWST allows us to see things that happened close to the start of the universe. I sort of understand how this works, but I was wondering if there is any sort of theoretical limit on how long ago something could have happened that we could see with the telescope? Are there things that are just gone from our ability to observe, or will we be able to see further back by looking in the right places with more and more powerful telescopes?

submitted by /u/DrColossusOfRhodes
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Botany: What is the difference between elaiosomes and fruit?

Posted: 13 Jul 2022 06:39 AM PDT

Or are elaiosomes considered a type of fruit? And in that case, what defines them? Is it something structural or are they functionally defined by the relationship with ants? I just encountered the word for the first time, and I'm trying to put the information into the proper conceptual slot.

The Wikipedia article is somewhat unclear and could use some revision, or at least more explanation in this regard.

submitted by /u/GreatMotherPeachy
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Wouldn’t we get the same or a similar deep field image from pointing the telescope anywhere else in space?

Posted: 13 Jul 2022 12:58 PM PDT

I feel that this is a silly question and I'm probably wrong but I was seeing a post of the scale of the dot where the JWST pointed at and people were surprised there were so many galaxies in that spot. But..there aren't right? There were that many galaxies that close together 13 billion years ago, not now.

If what we're doing is looking into the early universe, and the universe has been expanding since the Big Bang, then aren't we just seeing those first galaxies as they were closer together than they would be today?

And if what we're seeing is the very beginning of the universe then wouldn't pointing the telescope anywhere else for a long enough time reveal a similar picture? In fact, wouldn't we technically be seeing even the same early galaxies no matter where you point it at?

submitted by /u/CostaNic
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How do astronomers find the oldest sections of the sky to look at?

Posted: 12 Jul 2022 08:07 PM PDT

Obviously a lot of space related questions with the JWST doing it's thing, but i wanted to know how they find the ancient sections of space to analyze? Do they scan the entirety of space looking for super redshifted space, or are there areas of the sky that are known to be particularly old?

submitted by /u/Farts_McGee
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