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Sunday, May 23, 2021

Does Rabies virus spread from the wound to other parts of the body immediately?

Does Rabies virus spread from the wound to other parts of the body immediately?


Does Rabies virus spread from the wound to other parts of the body immediately?

Posted: 23 May 2021 03:45 AM PDT

Does it take time to move in our nervous system? If yes, does a vaccine shot hinder their movement?

submitted by /u/Heavans_Door
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Are moths negatively affected by streetlights?

Posted: 22 May 2021 10:23 PM PDT

Why is the symmetry of fundamental forces temperature dependent?

Posted: 23 May 2021 05:21 AM PDT

  1. If i understand this right, above a certain temperature there is a symmetry between the electromagnetic and weak nuclear forces, meaning they operate identically and are for all intents and purposes a single force.
    Now, really this is just a specific example of a larger concept so i guess trying to understand why temperature is even a factor in any symmetry, or "why do symmetries in general break based on temperature?". I'm not sure if specificity is my friend here.
    I'm just trying to form some sort of intuition so hopefully this doesn't require getting too technical.

  2. If i could get some explanation for how these temperature sensitive symmetries relate to Noether's theorem that'd be the cherry on top.
    I know in a general sense that physical symmetries correlate to specific conservation laws (or the conservation is the expression of the symmetry? I'm not sure what's the correct way to parse this). so does that mean that above the electroweak symmetry temperature there was some property that was conserved that is no longer a conserved property in our colder reality? if so, I'd love to know what it is if it's articulable.

  3. on a more general note, any resource that has a concise listing of symmetries and their corresponding conserved properties would be very much appreciated. preferably something neater than some dense dissertation where I'll get lost in the weeds XD

submitted by /u/SymphoDeProggy
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Why do d and especially f orbitals show poor shielding effect?

Posted: 23 May 2021 06:00 AM PDT

I guess it's somehow connected to the character of electron but I just can't find the connection. Why s and p orbitals have good shielding effect but d and f don't?

submitted by /u/Crafty_Cell_4395
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I have heard/read from a few sources that viral load is one of the factors influencing severity of the infection in Covid-19. How far is this true?

Posted: 22 May 2021 09:10 AM PDT

For example, if person A gets a higher viral dose than person B, is his/her infection more likely to be more severe and has there been any research/studies conducted on this? Also, I'd like to know if there's a minimum viral dose that is needed for symptomatic infection, and if this dose varies from individual to individual. The new (mutated) strains of Covid-19 are said to be more infectious- does this imply that a smaller viral dose is required to cause symptomatic infection?

submitted by /u/Kuchikitaicho
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Can mRNA vaccines be used to produce antibodies directly?

Posted: 23 May 2021 05:55 AM PDT

I found reading through https://berthub.eu/articles/posts/reverse-engineering-source-code-of-the-biontech-pfizer-vaccine/ incredible fascinating and started to wonder where things could go from here with this kind of technology.
Can we, instead of ordering cells to create the spike proteins and triggering an immune response, use this technolgy to order cells to create antibodies directly? My thinking is, creating a vaccine that does not cause any side effects you normally would get by an immune response.
I'm just curious if it is possible to use it for such more complex things to build like antibodies, or if it is even feasable. Or is this a stupid question given the immune system is way more complex than just antibodies and trying to build the immune response rather than triggering it is something that is beyond our reach in the near future. Or maybe unfeasable ever given the complexity? What are the limits of what we can do with that and were things could go from here?

submitted by /u/Masaca
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What caused the jump in atmospheric oxygen levels in the Ediacaran Period (635 Million years ago)?

Posted: 22 May 2021 06:46 AM PDT

The Great Oxidation Event (2.4 -2 billion years ago) gets a lot of attention and it seems like the leading hypothesis for what caused it was the proliferation of early photosynthetic life. However, (as far as I can tell) the levels of atmospheric oxygen were still relatively low until after the Cryogenian glaciations.

So, in short, what caused this later rise in atmospheric oxygen ?

submitted by /u/sully_underwater
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What prevents specific colors of light from exciting specific cones in our eyes?

Posted: 22 May 2021 02:17 AM PDT

Photons switch up photopsins in our cones from their cis state to their trans state, but why is light with specific wavelengths required for different types of cones?

Is it the shape of the cones that prevents all but one range of wavelengths from reaching the photopsins? Or is it the energy states of the electrons in the specific photopsins that require specific wavelengths for quantum jumps? Or maybe even pigments in our cones that absorb specific wavelengths?

submitted by /u/SaftigMo
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Barr Effect in binary star systems: what does the longitude of periastron being be between 0 and 90 degrees actually say about orientation of these binary systems?

Posted: 21 May 2021 07:56 PM PDT

I was answering a question about the Barr Effect on another sub, and I realized I can't conceptualize what the effect translates to for us as observers. I'll link the original post in a reply.

My understanding so far is that the Barr Effect was an observation that the longitude of periastron in spectroscopic binary systems was biased to be between 0-90 degrees.

I understand literally what it is, I think: the angle in the direction of motion between the ascending node and the point where the star in question is closest to the focus is biased to be between 0-90, but what does that translate to from our view point?

I was originally thinking it meant that the periastron of spectroscopically observed binary systems was biased to be further away from us, but I'm really not sure now.

My current explanation that I'm not sure is correct:

Since the Barr Effect is that most commonly observed angles are 0°-90°, it means that the point at which the stars are closest to each other tends to be further away from us, and also has a bias to be further away in one quarter of the orbit (rather than one half). The angle is defined in relation to the motion of travel, so 90° isn't the same as 270°.

Picture a clock that you're looking at directly. Between the 12 and the 3 is 0-90°. Now tilt that clock away from you so that the 12 is further away than the 6.

The Barr Effect says that the part where the stars are closest to the focus is likely to be in that 12- to 3-o'clock range.

submitted by /u/EliannaRys
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Saturday, May 22, 2021

When is a defibrillator used and when is chest compressions done?

When is a defibrillator used and when is chest compressions done?


When is a defibrillator used and when is chest compressions done?

Posted: 22 May 2021 12:40 AM PDT

Why most antigens result in polyclonal or heterogeneous sera?

Posted: 22 May 2021 04:32 AM PDT

Do cells have a way to prevent or remove viral injections of viral dna, to reduce the effect of the virus and repair broken proteins? And do cells duplicate a particular gene or genes contributing to a phenotype to reduce the impact of that and DNA not being repaired properly?

Posted: 21 May 2021 05:50 PM PDT

Or do they just go "whelp I'm dead 😵" and let natural selection wipe out the problem?

submitted by /u/dilletaunty
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How do Tsunami warning systems treat rogue waves? Do they send warnings for them?

Posted: 22 May 2021 12:01 AM PDT

How much alcohol gets burned during those special cocktail mixing events where a cocktail burns?

Posted: 21 May 2021 01:56 PM PDT

Would a cocktail that burns stop burning when the alcohol got used up? So just measuring the time until the flame stops, shows the amount of burned alcohol per second in percent for example?

submitted by /u/throwaway23453453454
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What methods exist to target the synthesis of Copernicium in the theorized Island of Stability?

Posted: 21 May 2021 12:30 PM PDT

Copernicium seems to have two isotopes in a theorized Island of Stability (https://en.wikipedia.org/wiki/Island_of_stability#/media/File:Island_of_Stability_derived_from_Zagrebaev.svg) with predicted half lives beyond a year. We've synthesized Copernicium already; how do we go about targeting the synthesis of specific isotopes?

submitted by /u/eganist
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Do we know how accurate the COVID antibody tests are?

Posted: 21 May 2021 10:45 AM PDT

Just wondering what the likelihood is that someone could have had COVID but not have it show on antibody tests? Would having an asymptomatic case matter?

submitted by /u/localhelic0pter7
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What causes Van Karman Vortexes?

Posted: 21 May 2021 07:31 AM PDT

I always see van karman vortexes form in creeks and heard they also cause howling of wind, but I have looked everywhere and found no explaination on what actually causes them can somebody help me out?

submitted by /u/JoshuaHale88
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Why does the cell membrane stay a membrane? Why don't the lipid molecules just start forming little droplets?

Posted: 21 May 2021 01:12 AM PDT

I realized I don't know that much about the dynamics of these lipids. There's a cytoskeleton around it and stuff, but still, wouldn't it be a more favorable for the molecules to form little spheres to minimize surface area with the surrounding water? What keeps them stable in this sheet structure?

submitted by /u/TranquilityTurtle
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Can boiling occur at a random point in a volume of fluid, or do the vapor bubbles require a surface to form on?

Posted: 21 May 2021 08:02 AM PDT

I was conducting a bit of a thought experiment where you would take a very tall column of water and put it in an environment where it should boil, like <100C at sea level. The water at the bottom of the column is under more pressure than the water in the middle, which is under more pressure than the water at the top. It may help if we assume the water in the column is at a uniform temperature, the same as the environment.

Say that in this environment, the water at the top and middle has a vapor pressure greater or equal to the pressure over the water at that point, so that bubbles of vapor can form. If the water in the bottom of the column was at such a high pressure that the vapor pressure of the bubble would not be enough to support the bubble over the pressure of the water, would the boiling appear on a boundary in the middle of the column, or off the side walls, and suddenly stop boiling when the water reaches a certain depth where the water pressure is too high?

submitted by /u/MOREiLEARNandLESSiNO
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Will phosgene gas be made if carbon monoxide is bubbled into sulfur dichloride?

Posted: 20 May 2021 10:48 PM PDT

On a similar note would hydrogen gas react directly with a chlorinating agent such as a sulfur chloride?

submitted by /u/Zestyclose_Heron7426
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Friday, May 21, 2021

mRNA vaccines: what become the LNPs that cross the BBB (blood-brain-barrier)?

mRNA vaccines: what become the LNPs that cross the BBB (blood-brain-barrier)?


mRNA vaccines: what become the LNPs that cross the BBB (blood-brain-barrier)?

Posted: 20 May 2021 02:52 PM PDT

Hello.

It seems that the LNPs (lipid nanoparticles) that contain the mRNA of Covid-19 vaccines from BioNTech and Moderna do - at low doses - pass the BBB. This is mentioned by the EMA several times in their report, for example p. 54 and discussed in the comments of an article on Derek Lowe's blog.

If that's indeed the case, what would happen once the mRNA + nanolipid reach the brain? Which cells would pick up the LNPs and for how long would they stay in the brain? If there is cells that can transform this mRNA in proteins, where will these proteins then go, and for how long will they stay in the brain? What about the LNPs: what can/will the brain do with the remaining lipids?

Edit: any difference between Moderna and Pfizer/BioNTech on that front? Their lipid (SM-102 in Moderna's mRNA-1273 and Acuitas ALC-0315 in Pfizer/BioNTech's Cominarty) have strong similarities, but they are not exactly the same.

Thanks!

submitted by /u/Slow_Tune
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Why are there no natural proton emissions in radioactive decay?

Posted: 21 May 2021 05:25 AM PDT

What immunologically is going on to make people asymptomatic carriers of COVID-19?

Posted: 20 May 2021 01:09 PM PDT

What mechanism immunologically speaking, causes people to be asymptomatic COVID-19 carriers? Is it that the innate immune system is more capable of controlling the infection very early in certain individuals?

I've asked my immunology professor and a few other medical professionals and they have all stated that it is not yet clear. I was curious if anyone has a better answer for me :) Thanks!

submitted by /u/Savo3333
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If you already have antibodies to a disease, would catching that disease afterward “boost” the antibodies allowing them to last longer than their expiration date?

Posted: 21 May 2021 05:30 AM PDT

Say that I get a vaccine that's good for a year and sometime during that year my body catches and successfully fights off that disease.

Would the antibodies be able to last for another year as of me successfully fighting that disease or would the one year limit still apply based on the initial gaining of antibodies?

submitted by /u/Aquatax
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Why are lithium-ion batteries better stored in the middle of their charge versus fully charged?

Posted: 21 May 2021 01:49 AM PDT

How big of a difference does this make for the battery longevity? If I kept one battery fully charged and one battery at 30% charge for a long time, would there be a noticeable impact?

submitted by /u/AlarmClock314
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Is lift generated by friction?

Posted: 21 May 2021 01:06 AM PDT

I'm teaching my friend about pilot stuff a d she asked of lift was generated by friction. And honestly I've spent 3 years studying this shit and I honestly don't know. It's by the difference in pressure creating different speeds but do the different speeds literally drag the airfoil up? Cause it won't work in a vacuum but it would work in a liquid.

This question is way more in-depth than I was taught. And if it's not friction then what specifically about the differences in speed/pressure make the wing produce lift.

Please this girl made me question my entire career

submitted by /u/TalontedJay
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How does Neptunium decay from atomic number 93 into Plutonium atomic number 94?

Posted: 20 May 2021 09:30 AM PDT

I'm reading The Making of the Atomic Bomb and it does explain it a little bit but I'm still very confused. The Uranium is bombarded with slow neutrons and fusion takes place as the neutron is captured and becomes Neptunium but then through alpha decay which ejects a helium nucleus which should lower the atomic number but instead increases it? I know I'm missing something here

submitted by /u/titos334
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Hitting an object faster than its internal speed of sound?

Posted: 20 May 2021 04:44 PM PDT

I know that a sonic boom occurs when an object travels through a medium faster than it's speed of sound, which is variable depending on the medium used. I am curious though for what happens when a solid object is struck and forced to move faster that it's own speed of sound.

For example let's say I have a diamond in a vacuum (I want to isolate it form any other potential interactions). A sound waves travel through a diamond at 12,000 m/s. If I slam another diamond into it at 15,000 m/s (let's assume this second diamond has gradually accelerated to this speed) then the atoms at first impact will move faster than pressure waves within the diamond can travel.

Will this cause a "sonic boom" within the diamond? Would this cause the diamonds to loose their structural integrity and disintegrate? If so, would any solid stuck faster than its speed of sound break down as well?

submitted by /u/Swag-n-Confidence
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What's inside fossilised eggs?

Posted: 20 May 2021 06:22 PM PDT

This morning I was watching Dinotrux with my son and a question occured to me. Let's say that you had a complete and unbroken dinosaur egg, if you cut that egg in half, could there be any fossilised bones inside?

Thanks in advance.

submitted by /u/Oxymoron0912
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Is plasma the same thing as ionised gas?

Posted: 20 May 2021 04:50 PM PDT

Can you train to not fall for optical illusions?

Posted: 20 May 2021 12:32 PM PDT

The title says it, can you not fall for optical illusions by somehow training your brain? Or is it as impossible like training to not see something that is really there?, let's say your phone or computer in which you are reading this.

submitted by /u/LastCucumber
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If everyone received the flu vaccine, would variants no longer appear?

Posted: 20 May 2021 01:44 PM PDT

Does the DNA in the AstraZeneca vaccine remain in the body forever?

Posted: 20 May 2021 11:18 AM PDT

In the mRNA vaccines the mRNA strands are destroyed after they create the proteins. But with the AZ vaccine the additional DNA is in the nucleolus, so does this mean when the cells are replicated they gain a copy of the additional DNA? Does this mean the body will forever be able to produce the mRNA needed to create the virus spike proteins?

submitted by /u/muskateer456
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How does the body react to sudden removal of fat tissue?

Posted: 19 May 2021 09:27 PM PDT

I know a tiny little bit about how the human body distributes excess fat and how it uses it, but I was just wondering how our bodies react to sudden removal of fatty tissue through something like liposuction or that freezing thing. Does it "notice" and attempt to compensate? Will it try to direct fat tissue to be stored in the places it was removed from?

Please excuse inaccurate language, I'm mostly using stuff I remember from a health class I took like 5 years ago.

submitted by /u/SlicedBananas
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What is the source of the first electrical pulse in the primitive heart tube of a fetus?

Posted: 19 May 2021 08:36 PM PDT

I tried googling it but I was only able to find a response that said it was spontaneous. Thanks in advance.

submitted by /u/ahmedzs321
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How do we know the Cambrian Explosion really was an increase in biodiversity, and not that Pre-Cambrian life was not fossilised due to soft body tissue and thus not shown in the fossil records ?

Posted: 19 May 2021 03:01 PM PDT

I've seen and heard countless times that the Cambrian explosion was an increase to biodiversity, but I thought not much was known Pre-Cambrian and before due to soft body tissue organisms only forming fossils increadably rarely. So how do we know the boom was an increase, and there wasn't as much bio-diversity beforehand ?

submitted by /u/AnonymousDragonite
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Thursday, May 20, 2021

if the FM radio signal transmits information by varying the frequency, why do we tune in to a single frequency to hear it?

if the FM radio signal transmits information by varying the frequency, why do we tune in to a single frequency to hear it?


if the FM radio signal transmits information by varying the frequency, why do we tune in to a single frequency to hear it?

Posted: 19 May 2021 09:19 PM PDT

AskScience AMA Series: We're health fertility Drs. and STEM advocates recently featured in NOVA PBS' "Fighting for Fertility" (link in description). AUA!

Posted: 20 May 2021 04:00 AM PDT

Hi, I'm Dr. Cindy M.P. Duke, a Johns Hopkins and Yale-trained physician scientist and entrepreneur who's board certified in gynecology and obstetrics, and fellowship-trained in reproductive endocrinology and infertility (REI). I also have a PhD in virology. As America's only dual-accredited women's health fertility expert and virologist, I'm the physician founder and medical and lab director of the Nevada Fertility Institute in Las Vegas, Nevada, USA.

My extracurricular work includes outreach to women and girls to encourage and foster their continued interest in careers in science, technology, engineering and math (STEM). I'm the host and producer of the 'Girl Powered Success & Survival International' aka GriPSSI Podcast, which is aimed at highlighting the work and dynamic career paths of women and girls around the globe. I'm also the producer of informative online programs aimed at debunking myths surrounding fertility and infertility among men and women in the diaspora and those within the LGBT community. I'm also actively creating and curating information about COVID-19 for the general public. Recently, Dr. Aimee and I were featured in the NOVA PBS documentary "Fighting for Fertility," which premiered on May 12 and can be streamed on YouTube.

As a Physician Executive, I've served on a number of hospital boards. I'm also a contributor and member of the Women's Health Advisory Council (WHAC) for Healthywomen.org, a Medical Advisor for Proov, a member of the Medical and Scientific Advisory board for CONFIRMD by Buddy Cheque, and a member of the Forbes Business Council. I'm also the current Leader of the Las Vegas Chapter of the Society of Physician Entrepreneurs. Throughout my career I've been - and continue to be - the beneficiary of many outstanding mentors and role models. As a result, outside of my clinical work and research, I understand the value of giving back to my community, which I view as the global village. My hobbies include gardening, photography, baking, and writing poetry.

Hi, Reddit! I'm Dr. Aimee Eyvazzadeh, a fertility specialist with my own practice in the San Francisco Bay Area. I specialize in IVF and have vast experience helping women over 35 realize their dreams of becoming a mother.

I graduated from UCLA School of Medicine and completed my residency in Obstetrics & Gynecology at Harvard Medical School. I also completed a fellowship in Reproductive Endocrinology & Infertility and hold a Master's in Public Health Management and Policy from the University of Michigan.

A large part of my public health mission is to educate people about their fertility potential and remove the veil of mystery surrounding reproductive medicine and technologies. In the nearly 20 years since I completed my medical training in 2001, I've become well-known for my innovative approach to fertility care that begins with diagnosis before treatment. I've met many women in their 30s and 40s who have struggled with their fertility and wished they had known more about it when they were younger. In 2012, a patient inspired me to launch The Egg Whisperer, a three-step plan for fertility testing, consultation, and tracking. Then in 2014, I extended my mission to help educate and empower young people in their 20s and 30s about their fertility and better plan for their future families by starting her now well-known "Egg Freezing Parties" in San Francisco. Fertility can be a heavy topic, so I wanted to create a lighthearted and fun approach to fertility education and understanding fertility preservation options.

We'll be here at 4 PM ET (20 UT), ask us anything about our work in fertility, involvement in STEM advocacy work, or our involvement with "Fighting for Fertility"!

Username: /u/novapbs

submitted by /u/AskScienceModerator
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What is the least complex organism that sleeps? What is the most complex life form that doesn’t sleep? Why couldn’t we have evolved from the latter? (I hate wasting my time on sleep.)

Posted: 19 May 2021 01:46 PM PDT

What is the physical explanation behind the decrease of open circuit voltage as temperature increases in an amorphous solar PV cell?

Posted: 20 May 2021 02:14 AM PDT

I have researched and looked at several papers describing the effect of temperature on the Isc and VOC, and seen many numerical explanations as to why the voltage drops, with reference to I-V curve and other equations, but none actually described why this physically happens. What causes voltage to drop at increased temperatures? Is it the decreased bandgap? It would be appreciable if you could link any related papers that explain this phenomenon physically.

Thanks

submitted by /u/LordSaumya
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if mass curves spacetime why do planets in a vacuum follow curved paths?

Posted: 19 May 2021 09:58 PM PDT

Why was the storage temperatures needed for the Pfizer vaccine so limited before? Why were other temperatures not tested during the trial phases?

Posted: 20 May 2021 05:29 AM PDT

Does a satellite in a geosynchronous orbit experience time dilation relative to Earth's surface?

Posted: 19 May 2021 05:59 PM PDT

How does your body store the immunity you get from a vaccination long term?

Posted: 19 May 2021 12:46 PM PDT

I hope this makes sense. How does your body store the immunity you get from a vaccination long term? Like if you go get vaccinated and 9 months later you are infected, how does it still know what to do to attack the virus? If you can, can you explain it like I am a small child because I have trouble understanding a lot of things. Thank you!

submitted by /u/zenjen9017
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What is the “Syncardidia” family of animals?

Posted: 19 May 2021 02:12 PM PDT

I was looking at Wikipedia articles about Troglofauna and the like (Cave animals, in short) and I came across a reference in a Wikipedia article on cave bugs specifically, which lists some families of animals that contain troglobites. So the article goes on to list some crustaceans like "Isopoda" and "Decapoda", you know, familiar, well researched families. And then it casually mentions "Syncardidia" as well. My interest was piqued when I hovered over the hyperlink, thinking "I'm not sure I've heard of these before" and to my surprise, there is no Wikipedia article on them. So out of curiosity, I googled it, but only was directed to the article I was already reading because it mentioned them, as well as a "did you mean Syncardia" which when I clicked it gave me results for a prosthetic heart manufacturer or something.

I've searched for the family specifically but I can find nothing on it where it isn't simply mentioned offhand in a list. The answer is probably entirely mundane, but I can't help but be intrigued by this apparently undefined (on the Internet at least) family of animals.

submitted by /u/WiryJoe
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How much sleep do bees need each day?

Posted: 19 May 2021 09:56 AM PDT

How did the Mascarene Islands become the Great Indo-Pacific Melting Pot?

Posted: 19 May 2021 10:34 AM PDT

The massive extent of extinctions on the Mascarene islands (Mauritius, Reunion, Rodrigues) can often obscure just how strangely diverse the origins of its many former occupants were, spanning all regions of the Indo-Pacific.

Some like the Phelsuma day geckos are expected residents of the region as they also exist in nearby places like Madagascar and the Seychelles, but many others are very, very weird. To wit:

  • The sadly extinct Cylindraspis tortoises are thought to have originated not in Madagascar, but in mainland Africa, and island-hopped the many volcanic islands produced until humans came along and killed them.

  • The Mascarenes are presently home to about 3 species of Nactus geckos. Aside from there, all other Nactus geckos are found in Australia, New Guinea, and similar islands.

  • The Leiolopisma skinks have 1 extant species and 3 extinct species on the Mascarenes. The only other Leiolopisma skink is one from Fiji, an entire ocean away (and also a dubious one from New Zealand, also an entire ocean away).

  • The dodo and solitaire's closest cousin is the Nicobar pigeon, a bird found in the eastern Indian and west Pacific oceans.

  • The extinct Mauritius starling (and probably its relatives) is thought to be closely related to the physically quite similar Bali myna, which is only found in Indonesia.

So how did the Mascarenes come to be dominated by all these animal groups from random portions of the world, as opposed to simply those from the nearby Madagascar and Seychelles islands? The Mascarenes themselves only formed about 10 million years ago in the Pliocene, so not a massive time either.

submitted by /u/HumaneBotfly
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Why are the rings of Saturn only orbiting it on one axis?

Posted: 19 May 2021 04:05 PM PDT

Why are the rocks orbiting Saturn only orbiting on one axis so they form a ring? Why are they not spinning around it on different axes?

submitted by /u/ttttttony
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why do mRNA vaccines need to be stored at -80C?

Posted: 19 May 2021 03:21 PM PDT

I heard on the radio today that the latest tests from pfizer showed the mRNA vaccine could be stored at regular fridge temperatures (2 to 8C) for up to 30 days instead of the original -60 to -80C.

which made me wonder:

why -60 to -80C in the first place?

I mean, at -10C the water is already frozen. it's just as frozen at -20C and at -30C and at -50C.

so what's the difference if you store it in a regular freezer at -20C or in a special freezer at -80C?

submitted by /u/JeNiqueTaMere
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Do all Black Holes spin the same direction?

Posted: 19 May 2021 12:34 PM PDT

Do black holes spin in different directions or so they all spin the same way? What would make them spin the other way?

submitted by /u/Pucka1
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From what we know about how other viruses work, if someone has a mild case of covid, does that at all predict that if they later get infected by another variant they will likely have a similar reaction (ie, another mild case)?

Posted: 19 May 2021 08:33 AM PDT

What instruments would be required to detect the presence of tectonic plates on exoplanets outside our solar system?

Posted: 19 May 2021 04:19 PM PDT

Would the Webb telescope have that ability, or just the ability to determine atmosphere composition? Can atmosphere composition indirectly point to plate tectonics?

submitted by /u/chrisdab
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Assume two people start moving from the equator of a sphere in a 'northward' direction; what do they have to do to ensure they stay parallel to each other without changing direction? What angle would their path make with the equator?

Posted: 19 May 2021 01:43 PM PDT

Why do these images from the center of the Milky Way seem to display flickering luminosity?

Posted: 19 May 2021 11:52 AM PDT

When one of the central objects in this footage comes near the center of the galaxy, it speeds up. At the same time there's what seems like flickering changes in luminosity in various objects throughout the image. I assume it's just that the frames haven't been adjusted with each other to be "uniform". I'm guessing the earliest images are of less quality and once data increases, the "luminosity" also appears to go up. Amirite?

https://www.youtube.com/watch?v=B0QRpid5_QU

submitted by /u/Delukse
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