Why do those with Down syndrome have similarly shaped faces?

---

• Why do those with Down syndrome have similarly shaped faces?
• Is this paper correct in stating that Newtonian physics can be indeterministic?
• How can stitches prevent leaks in arteries following surgery, given the pressure in those vessels?
• Can pollution actually alter the color of a summer sky?
• Why does the radio that is used for wireless communication have that distinct chatter-y sound?
• Why does fast wind howl?
• Are we prepared to handle a direct hit from a CME?
• If the average personal computer today is compared to a supercomputer from some time ago, at what year have their performance intersected?
• Why can't we remember our memories when we were a baby?
• Why do jet engines not have bell-shaped nozzles like rocket engines?
• How does alpha or β+ decay effect an atoms bonding?
• Why do other mammals not get food poisoning from eating raw meats yet humans do?
• What exactly does http/https encryption encrypt?
• When someone is getting their leg amputated, what determines the type of amputation that person receives (ertl or normal amputations)?
• If the nearest star is about 4.2 light years away from our solar system, and if that star has a planet capable of supporting intelligent life, is our sun bright enough to be part of a constellation from their point of view?
• Do virgin photons exist? Photons that travel from other stars without touching matter?
• How is determined the acceptable amount of toxic substances in food?
• Can you shoot a gun, fatally, in space? What would happen?
• When we manage to colonize Mars, would it be more viable to live on the surface? Or underground?
• Do animals other than humans experience symptoms of pregnancy?
• Distance and diameter of the sun?
• Why are ATX-Connectors build, so that there are multiple Pins with the same function?

Why do those with Down syndrome have similarly shaped faces? Posted: 02 Jul 2017 10:33 AM PDT While most faces are still unique in some way, those with Down Syndrome can be recognizable due to smaller ears, flatter face, almond-shaped eyes, and flatter nose. With all of the variations of facial features, why does Down Syndrome give even those who have a different cultural background very similar facial features? submitted by /u/theregoesmyeye [link] [comments]

Is this paper correct in stating that Newtonian physics can be indeterministic? Posted: 02 Jul 2017 09:40 PM PDT In this 2008 paper PDF, the author presents an example of a situation--a ball perched at rest atop a dome--in which the laws of Newtonian physics are indeterministic, that is, the same exact initial conditions can produce more than one outcome. In this case, that the ball can either remain at rest on top of the dome, or slide off at some arbitrary radial trajectory at any time. I have been under the impression that Newtonian physics are purely deterministic (and for the only possible indeterminism in physics, one needed to appeal to quantum mechanics). So, is this paper correct in asserting that they are not? And if it is correct, why isn't this more widely known? (or is it just me?) submitted by /u/tripperjack [link] [comments]

How can stitches prevent leaks in arteries following surgery, given the pressure in those vessels? Posted: 02 Jul 2017 09:36 PM PDT submitted by /u/Colin_Sack-or-Pick [link] [comments]

Can pollution actually alter the color of a summer sky? Posted: 02 Jul 2017 07:16 PM PDT I've lived in NYC my whole life. Sometimes the sky looks cotton candy colored and I can't see how pollution would play a role in that. submitted by /u/herbalderbil [link] [comments]

Why does the radio that is used for wireless communication have that distinct chatter-y sound? Posted: 02 Jul 2017 10:28 AM PDT Is it because of some special reason? Because we have crystal clear sound from our smartphones which are also wireless but those radio sounds are kinda hard to understand. Edit: Grammar submitted by /u/Etmurbaah [link] [comments]

Why does fast wind howl? Posted: 02 Jul 2017 05:45 PM PDT submitted by /u/RandyVvV [link] [comments]

Are we prepared to handle a direct hit from a CME? Posted: 02 Jul 2017 04:14 PM PDT Are there procedures in place for when the Earth is hit by a coronal mass ejection? What are they? What would be the short term effects? Long term? This is coming from a guy who just learned what a CME is an hour ago. submitted by /u/cheetoes24 [link] [comments]

If the average personal computer today is compared to a supercomputer from some time ago, at what year have their performance intersected? Posted: 02 Jul 2017 08:11 PM PDT For example, purely hypothetical, does the average PC today even come close to supercomputers back in 1990s? submitted by /u/mczoomies [link] [comments]

Why can't we remember our memories when we were a baby? Posted: 02 Jul 2017 02:21 PM PDT submitted by /u/remzzz72 [link] [comments]

Why do jet engines not have bell-shaped nozzles like rocket engines? Posted: 02 Jul 2017 03:56 PM PDT I understand that a bell nozzle on a rocket engine works by redirecting all of the sideways-expanding exhaust to point downward, which increases the thrust of the engine. Obviously this logic does not apply to jet engine exhaust, but why? Jet engines use combustion as their power source, so why do engine bells not work to capture all of the hot exhaust? submitted by /u/FishInferno [link] [comments]

How does alpha or β+ decay effect an atoms bonding? Posted: 02 Jul 2017 09:29 PM PDT I'm curious about the general trends but I can provide a specific example if my question doesn't make sense: If I have a 89 Zr4+ ion and bond it to something, it'll form 4 bonds. The Zr will then decay via β+ emission to 90 Y, which has one fewer protons, hence the neutral atom with 4 bonds will suddenly have a negative charge and an oxidation state that doesn't typically allow for 4 bonds. What happens to the atom? Does a H+ jump in and steal the negative charge? Does the negative charge go into anti-bonding orbitals? Does the atom fly off, it's bonds broken? submitted by /u/mandragara [link] [comments]

Why do other mammals not get food poisoning from eating raw meats yet humans do? Posted: 02 Jul 2017 12:59 PM PDT submitted by /u/charlie8035 [link] [comments]

What exactly does http/https encryption encrypt? Posted: 03 Jul 2017 04:02 AM PDT If I go on the BBC website for example, what exact data is being sent across the internet that I probably wouldn't want people seeing? Obviously the contents of the actual web page I'm going to will be sent, but what personal information (if any) would be vulnerable if I did not use http or https encryption? submitted by /u/tarkaotterman [link] [comments]

When someone is getting their leg amputated, what determines the type of amputation that person receives (ertl or normal amputations)? Posted: 02 Jul 2017 08:10 PM PDT submitted by /u/reallinzanity [link] [comments]

If the nearest star is about 4.2 light years away from our solar system, and if that star has a planet capable of supporting intelligent life, is our sun bright enough to be part of a constellation from their point of view? Posted: 02 Jul 2017 11:19 PM PDT I'm sure our sun is bright enough to be seen from 4.2 light years away but when you consider that we usually create constellations from the brighter stars in our night sky, would our sun be considered bright enough to be part of one of their constellations or would it just be a tiny speck in the background? submitted by /u/Sociopathic_Pro_Tips [link] [comments]

Do virgin photons exist? Photons that travel from other stars without touching matter? Posted: 02 Jul 2017 09:55 AM PDT Or do all photons eventually bounce off some form of matter on their travel? submitted by /u/JoeOfTex [link] [comments]

How is determined the acceptable amount of toxic substances in food? Posted: 02 Jul 2017 05:10 PM PDT I am particularly interested in knowing if the current average lifespan is taken in consideration when it comes at fixing this level. What if the lifespan increase significantly and we start to die due to the "acceptable amount of mercury"etc in our food instead of dying at 80 like "we were supposed to"? submitted by /u/relightit [link] [comments]

Can you shoot a gun, fatally, in space? What would happen? Posted: 02 Jul 2017 08:03 AM PDT Just a thought spanning from the USA's proposed Space Corps sixth branch of the armed forces (ignoring the coast guard), and also the eventual follow up thought of those Call of Duty missions.   My instant thought is of a slowing bullet leaving the chamber, or that it'd slow down and just float on into deep space, but hey if I knew what would happen I wouldn't r/askscience. submitted by /u/RubioJones [link] [comments]

When we manage to colonize Mars, would it be more viable to live on the surface? Or underground? Posted: 02 Jul 2017 02:59 PM PDT submitted by /u/Phobicity [link] [comments]

Do animals other than humans experience symptoms of pregnancy? Posted: 02 Jul 2017 08:47 PM PDT As in nausea, cravings, etc. I doubt any as similar as our human symptoms obviously. submitted by /u/notapotat-o [link] [comments]

Distance and diameter of the sun? Posted: 02 Jul 2017 07:54 PM PDT How do we know the sun's distance from the Earth? What's the evidence that it is so far away? How do we know the sun's diameter? Thanks scientists. submitted by /u/Noble_monkey [link] [comments]

Why are ATX-Connectors build, so that there are multiple Pins with the same function? Posted: 02 Jul 2017 12:25 PM PDT Seems like wasted space to me submitted by /u/D4nte188 [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth?

---

• Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth?
• How is the analog signal from a HDD read head processed before it is digitized?
• On an infinite square grid of perfect one Ohm resistors, what is the equivalent resistance between two points that are a knight's move from each other?
• How does the internal body maintain a temp of 37 (98.6F) degrees Celsius without difficult yet any temperature over, say, ~26 (~80F) degrees Celsius is seemingly hot and causes a sweat (cooling) response in most, despite the internal temperature being much higher?
• How can scientists measure the electron affinity and the ionization energy of an element?
• What adaptations would reef organisms have had to survive past climate conditions (e.g., in the Cretaceous) when atmospheric carbon dioxide levels were much higher than they are today?
• How does gravity shift wavelength for light emitted at non-radial directions and for observers located at finite distance?
• How does the VASIMR rocket engine not destroy itself?
• Scientist are capable of artificially creating temperatures of near 0k, how are these temperatures measured?
• How do submarines cause cavitation on their bodies/propellers and what exactly does it do to the metal?
• How does laser strength fall off with distance?
• [Computer Eyestrain] Is there a difference between using a blue-light filtering software on the computer, and tinted computer eyeglasses that claim to do the same, assuming the screen is non-reflective matte?
• If the boiling point of water is 100°C, why is gaseous water present in the air at room temperature (~26°C)?
• How does using an attenuated/inactivated vaccine with someone infected with rabies help?
• How come crocodiles were able to survive the K-T extinction event but no land-based dinosaurs were?
• How did we go from unicellular to multicellular life?
• Is fat burned during or after exercise?
• Euler's identity in non-euclidean euclidean geometry?
• How do we know that The Speed of Light is the speed limit of the universe?

Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth? Posted: 01 Jul 2017 03:06 PM PDT submitted by /u/TheDesertSnowman [link] [comments]

How is the analog signal from a HDD read head processed before it is digitized? Posted: 01 Jul 2017 08:38 AM PDT Doing a simple estimation, a hard drive might be able to read 128 MB/s. Maybe it has 4 platters, giving each read head a reading speed of 32 MB/s, or 256 Mbit/sec. So this would be a 256 MHz signal coming from the read head, but of course it's not a clean digital signal. Some of the magnetic domains might have lost some of their alignment making their signal weaker, and in any case everything would bleed together a bit, right? What does the signal from the read head look like, and how is it processed to become digitized? Furthermore, how does the HDD even know where the read head is in terms of the circumference of the platter? submitted by /u/tpk5 [link] [comments]

On an infinite square grid of perfect one Ohm resistors, what is the equivalent resistance between two points that are a knight's move from each other? Posted: 01 Jul 2017 02:46 PM PDT Relevant XKCD I've been reading XKCD for years at this point, and I like looking into things that appear in the comics. What is the resistance here, how would you work it out, and why is it so incredibly hard? submitted by /u/MrAcurite [link] [comments]

How does the internal body maintain a temp of 37 (98.6F) degrees Celsius without difficult yet any temperature over, say, ~26 (~80F) degrees Celsius is seemingly hot and causes a sweat (cooling) response in most, despite the internal temperature being much higher? Posted: 01 Jul 2017 11:39 AM PDT submitted by /u/SavageDuckling [link] [comments]

How can scientists measure the electron affinity and the ionization energy of an element? Posted: 02 Jul 2017 02:14 AM PDT I am pretty curious about the method that the scientists use to measure the electron affinity and the ionization energy of an element. If someone knows about it, please tell me. submitted by /u/Keddongy [link] [comments]

What adaptations would reef organisms have had to survive past climate conditions (e.g., in the Cretaceous) when atmospheric carbon dioxide levels were much higher than they are today? Posted: 02 Jul 2017 05:16 AM PDT Considering the concerns regarding the impact of ocean acidification on the abilities of organisms that build calcium carbonate skeletons, I have often wondered what adaptations might such organisms have had in the distant past when atmospheric CO2 was considerably higher than it is today? Are there living species that are largely unaffected by such effects? submitted by /u/mynameismrguyperson [link] [comments]

How does gravity shift wavelength for light emitted at non-radial directions and for observers located at finite distance? Posted: 01 Jul 2017 08:10 PM PDT The only equations I could find for gravitational redshift assumed that light was emitted radially, directly outward from the mass and that the observer was located infinitely far away from it and any other masses. How would this change if the light was emitted at a different angle or if the observer was still within the mass's gravitational field? submitted by /u/Platyturtle [link] [comments]

How does the VASIMR rocket engine not destroy itself? Posted: 01 Jul 2017 10:22 PM PDT http://www.adastrarocket.com/aarc/VASIMR This engine may power our spacecraft one day, and I understand the gist of it except for this: "ICH is a technique used in fusion experiments to heat plasma to temperatures on the order of those in the Sun's core (10 million K)". The Museum of Flight, where I learned about the engine today, said something similar. How can heat of that incredible magnitude be produced in any machine without destroying it in an inferno? Are there materials or construction methods that could actually withstand such temperatures? submitted by /u/Reverie_39 [link] [comments]

Scientist are capable of artificially creating temperatures of near 0k, how are these temperatures measured? Posted: 01 Jul 2017 05:57 PM PDT submitted by /u/Rasct [link] [comments]

How do submarines cause cavitation on their bodies/propellers and what exactly does it do to the metal? Posted: 01 Jul 2017 10:46 PM PDT I'm trying to get an in-depth but idiot-readable explanation of Cavitation What causes it, what it does and how it affects life underwater in a submarine So I can help the developers of the game Subnautica understand cavitation and therefore fix their game submitted by /u/pm_me_ur_diapergirls [link] [comments]

How does laser strength fall off with distance? Posted: 01 Jul 2017 11:02 AM PDT Normally, light follows the inverse square law when it comes to intensity, but lasers are very concentrated so it takes a longer time for this law to take significant effect. What I want to know is when/where this transition is and how the signal strength can be modeled before and after it. submitted by /u/Platyturtle [link] [comments]

[Computer Eyestrain] Is there a difference between using a blue-light filtering software on the computer, and tinted computer eyeglasses that claim to do the same, assuming the screen is non-reflective matte? Posted: 01 Jul 2017 12:10 PM PDT submitted by /u/smartfon [link] [comments]

If the boiling point of water is 100°C, why is gaseous water present in the air at room temperature (~26°C)? Posted: 01 Jul 2017 05:41 AM PDT Question says it all. If the temperature at which water becomes a gas at 100°C, how is it possible that it is still in a gaseous state at room temperature and it doesn't just condense in the air? submitted by /u/D_H_M_O [link] [comments]

How does using an attenuated/inactivated vaccine with someone infected with rabies help? Posted: 01 Jul 2017 05:43 AM PDT I understand these vaccines will familiarise the immune system with the virus and therefore cause a quick immune response the next time the person is infected, but if the person has already been infected, won't the vaccine just have the same effect on the immune system as the actual infection? Wouldn't it make more sense to inject them with antibodies? submitted by /u/smrnnm [link] [comments]

How come crocodiles were able to survive the K-T extinction event but no land-based dinosaurs were? Posted: 01 Jul 2017 06:57 AM PDT submitted by /u/Everyones__Grudge [link] [comments]

How did we go from unicellular to multicellular life? Posted: 30 Jun 2017 10:45 PM PDT submitted by /u/newtglobe [link] [comments]

Is fat burned during or after exercise? Posted: 30 Jun 2017 11:34 PM PDT I know excersizing burns fat, but does it occur while you're excersizing or does it take place afterwards? submitted by /u/proudwhytetrash [link] [comments]

Euler's identity in non-euclidean euclidean geometry? Posted: 01 Jul 2017 03:46 PM PDT What happens with Euler's identity in non-euclidean geometry? submitted by /u/Untrahaer [link] [comments]

How do we know that The Speed of Light is the speed limit of the universe? Posted: 01 Jul 2017 08:37 AM PDT submitted by /u/AhriNineTail [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

There are thousands of seemingly isolated bodies of water all throughout the planet which happen to have fish in them. How did they get there if truly isolated?

---

• There are thousands of seemingly isolated bodies of water all throughout the planet which happen to have fish in them. How did they get there if truly isolated?
• How are black/white photos colorized?
• Was there an evolutionary advantage to different hair colors in humans?
• Does writer's block have a neurological foundation?
• Can you train your memory to be better? If so, is there any limit to how far you can take it?
• How powerful is the laser in a typical fiber optic cable?
• Why are we so much more likely to stumble in a stalled escalator than in regular stairs?
• Do bird's nests get reused?
• Why is it that so many seemingly unrelated languages have raised tone at the end of a sentence denote an interrogative?
• What's the significance of oxidation number in a covalent bond? Are the electrons shared, or aren't they? (rephrased my awkward question from yesterday)
• During beta decay, when a neutrino and a beta ray are created, where does it's mass come from?
• How is the Moon covered mostly fine dust if the erosion forces of wind, water, and plate tectonics do not exist?
• ARC - A nuclear fusion reactor from MIT smaller and cheaper than ITER - a year has passed and no one talk about it. Why?
• Why dont plants suffer from the effects of aging and cancers like mamals do?
• Nuclear fission and fusion have been explained to me as "opposites." Why do they both produce energy?
• Using QFT or String Theory, why would an electron be attracted to/more likely to exist around positive charges such as protons?

There are thousands of seemingly isolated bodies of water all throughout the planet which happen to have fish in them. How did they get there if truly isolated? Posted: 30 Jun 2017 10:27 AM PDT submitted by /u/Toddzilla1337 [link] [comments]

How are black/white photos colorized? Posted: 30 Jun 2017 07:38 AM PDT I think the post is pretty clear... How to people colorize black and white photos with such accuracy and stuff? submitted by /u/texzone [link] [comments]

Was there an evolutionary advantage to different hair colors in humans? Posted: 30 Jun 2017 06:11 PM PDT Basically what the title says, and I know how different hair colors are a result of different proteins and melanin, but how do the did the different range of colors help humans in earlier time periods adapt to their environments and have higher survival rates? submitted by /u/dizzyoak1 [link] [comments]

Does writer's block have a neurological foundation? Posted: 30 Jun 2017 06:43 AM PDT I'm just wondering if anyone has brain-scanned someone suffering from writer's block. Can you see a downturn in the various language areas of the brain? Is it a measurable phenomenon or is it one of those "too-subjective-to-be-measured" things? submitted by /u/chorjin [link] [comments]

Can you train your memory to be better? If so, is there any limit to how far you can take it? Posted: 30 Jun 2017 05:28 PM PDT If someone trained their whole life would they have near-photographic memory? submitted by /u/PhosBringer [link] [comments]

How powerful is the laser in a typical fiber optic cable? Posted: 30 Jun 2017 07:11 PM PDT Just want to know in Watts the approximate power of a laser in a fiber optic cable that would be used for something like internet providing or similar fiction. If possible the input strength and output strength, say over 10 meters. submitted by /u/hisnameislongarms [link] [comments]

Why are we so much more likely to stumble in a stalled escalator than in regular stairs? Posted: 30 Jun 2017 09:13 PM PDT submitted by /u/Gargatua13013 [link] [comments]

Do bird's nests get reused? Posted: 30 Jun 2017 05:22 PM PDT I watched some birds grow from eggs tohatchlings and, now that they are gone, I am hoping they will come back next year. Do birds ever reuse their nests? submitted by /u/Batman_is_Bateman [link] [comments]

Why is it that so many seemingly unrelated languages have raised tone at the end of a sentence denote an interrogative? Posted: 30 Jun 2017 03:10 PM PDT If languages evolved separately, why do they all contain this particular quirk? In almost every single language I've come into contact with, raising your tone at the end of a sentence means that you're asking a question. submitted by /u/rks- [link] [comments]

What's the significance of oxidation number in a covalent bond? Are the electrons shared, or aren't they? (rephrased my awkward question from yesterday) Posted: 30 Jun 2017 03:09 PM PDT I am trying to understand the REASON for the following: Valence count - assume all electrons are shared equally Formal charge - assign one half of bonding electrons to each atom Oxidation number - assign all bonding electrons to the most electronegative atom None of these is actually true, but each gives a quick approximation that is useful for a particular type of problem. https://chemistry.stackexchange.com/questions/13827/how-is-the-charge-of-covalently-bonded-atoms-determined submitted by /u/thefourthchipmunk [link] [comments]

During beta decay, when a neutrino and a beta ray are created, where does it's mass come from? Posted: 30 Jun 2017 05:09 PM PDT submitted by /u/PM_Me_Random_Pix [link] [comments]

How is the Moon covered mostly fine dust if the erosion forces of wind, water, and plate tectonics do not exist? Posted: 30 Jun 2017 07:01 AM PDT If I remember right there was a point where the moon had mildly active plate tectonics (correct me if I'm wrong), but I still don't understand what other than meteor impacts could cause any erosion on the surface, let alone enough to make a fine dust. Also on a side note, I know that relative to Earth meteoroids are called meteors when traveling through the atmosphere and meteorites when they've impacted the ground, but how should they be referenced in relation to the moon since it has no atmosphere? Edit: Despite proofreading my post I still have a typo in my title. Frick. submitted by /u/DBudders [link] [comments]

ARC - A nuclear fusion reactor from MIT smaller and cheaper than ITER - a year has passed and no one talk about it. Why? Posted: 30 Jun 2017 10:52 AM PDT edit: The name of the reactor designed by MIT is SPARC. Video: https://youtu.be/KkpqA8yG9T4 https://www.google.it/amp/s/amp.theguardian.com/environment/2016/oct/17/mit-nuclear-fusion-record-marks-latest-step-towards-unlimited-clean-energy submitted by /u/iknownothinggg [link] [comments]

Why dont plants suffer from the effects of aging and cancers like mamals do? Posted: 30 Jun 2017 04:39 AM PDT So bare with me its been a while since my last biology class. If the semi-conservative replication of DNA causes degredation over time which leads less and less acurate copies of DNA strands is attributed with causing the visable effects of aging, and higher occurances of cancers. Then how can plants such as redwood trees live for hundreds of years with out simply dying of old age ? submitted by /u/VPope [link] [comments]

Nuclear fission and fusion have been explained to me as "opposites." Why do they both produce energy? Posted: 30 Jun 2017 02:11 PM PDT submitted by /u/richbellemare [link] [comments]

Using QFT or String Theory, why would an electron be attracted to/more likely to exist around positive charges such as protons? Posted: 30 Jun 2017 10:29 AM PDT If we consider particles to be an excited state of a field or string, why would they exhibit an attractive force toward another wave? submitted by /u/Gonzobean7 [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States