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Sunday, August 12, 2018

Why do so many tarantula species contain the word "Baboon"?

Why do so many tarantula species contain the word "Baboon"?

Why do so many tarantula species contain the word "Baboon"?

Posted: 11 Aug 2018 04:10 PM PDT

"king baboon spider" "orange baboon spider" "horned baboon tarantula" "blue baboon spider" Are they related or do arachnologists just like the word baboon?

submitted by /u/TitanFallout
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Are there any diseases/conditions that are beneficial to people’s bodies?

Posted: 11 Aug 2018 06:33 PM PDT

When an animal is eaten whole, how does it actually die? Suffocation? Digestive acid?

Posted: 12 Aug 2018 04:20 AM PDT

How much radiation would you be exposed to holding weapons-grade plutonium in your hand?

Posted: 12 Aug 2018 05:07 AM PDT

In a movie I saw yesterday there were several scenes of the characters holding spheres of weapons-grade plutonium in their bare hands with seemingly no concern for how radioactive it is.

My gut says this is a really, really bad idea, but I'm curious just how bad it would be. How much radiation would you be dosed with if you did that in real life?

submitted by /u/molten_dragon
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Where do mosquitoes hide when it rains buckets?

Posted: 11 Aug 2018 04:13 PM PDT

Where do mosquitoes (and other insects) hide when it rains buckets?

submitted by /u/pointillistic
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How does gravity affect the hability of a planet?

Posted: 12 Aug 2018 06:03 AM PDT

What are we measuring the speed of light against?

Posted: 12 Aug 2018 03:21 AM PDT

The velocity of an object is always descried relative to a specific inertial frame, but since the speed of light is absolute, how are we able to major its true value?

submitted by /u/SamHamThankYouMaam
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Why do we go into "food comas" after eating large amounts of food?

Posted: 11 Aug 2018 03:16 PM PDT

How do high speed cameras stay focussed when using mirrors to capture videos, even though the object varies it’s focal distance from the mirror?

Posted: 12 Aug 2018 02:09 AM PDT

So I get that mirrors can be used to spin quickly to capture the object even at high speed. But IIRC high speed cameras have a very demanding focal length to be effective - so how can a projectile (let's just say a bullet) be tracked in focus even though the distance from the mirror varies over time?

submitted by /u/greeneebeenee
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Why is it CO2, H2SO4 but not O2C, H2O4S?

Posted: 12 Aug 2018 05:42 AM PDT

Since I started learing Chemistry at 8th grade, I have wondered why it must be that. Does it have a rule to measure it? Sorry if my English was bad.

submitted by /u/JunNguyen
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Why do the planets orbit the Sun on nearly the same plane, and the Perseids meteors orbit the Sun on a different plane?

Posted: 11 Aug 2018 03:21 PM PDT

I know that the Perseids meteors aren't all on the same plane, but it is definable enough to be shown like it is here: https://www.meteorshowers.org/

Why is it like this?

submitted by /u/InherentlyJuxt
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What is the current leading theory as to why ice is slippery?

Posted: 12 Aug 2018 03:26 AM PDT

Why is there a speed of sound?

Posted: 11 Aug 2018 10:22 PM PDT

Why would air waves not move faster when the disturbance causing the sound is stronger?

submitted by /u/biklaufiklau
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Does treating a low grade fever prolong your illness?

Posted: 11 Aug 2018 12:53 PM PDT

Conflicting studies out there that suggest that treating a fever doesn't prolong the illness, while other suggest it is beneficial.

So, to me, a lower grade fever can be beneficial, but a higher fever should certainly be treated. So this leads me to ask: does treating a low grade fever actually prolong your illness?

submitted by /u/99_Mining
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I had read that mammalian milk glands developed from sweat glands. If that is true does it imply that some intermediate species were drinking something that was partly sweat and partly milk?

Posted: 11 Aug 2018 12:44 PM PDT

In a way, to gain an understanding of how these transitions occur.

submitted by /u/shagminer
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Are paraphilias (like pedophilia) "treatable"?

Posted: 11 Aug 2018 08:11 AM PDT

I realize that this might not be the right word, since they're not exactly diseases, but you know what I mean

submitted by /u/thetimujin
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How does the ISS rrmain a relatively stable speed in orbit with all of the docking of modules and shuttles it deals with?

Posted: 11 Aug 2018 01:45 PM PDT

This has always fascinated me. I believe it may have to do with boosters and/or such, but I figured I would ask. When, say, a space shuttle docks with the ISS, what procedures or mechanisms do they employ to prevent the ISS from slowing its orbital speed? I assume one or two dockings wouldn't hinder it so much to cause that big of an issue, but over the span of its life time, I can see how it could become a serious problem. Also, if any of my assumptions are incorrect, please correct me. 😁

submitted by /u/acharvey87
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Are the 'habitable' zones in systems with binary and trinary systems farther out and/or larger over all?

Posted: 11 Aug 2018 01:39 PM PDT

How much earth is required to be a suitable ground?

Posted: 11 Aug 2018 12:53 PM PDT

After seeing a repost of an electrical load being grounded to a bag of rocks and dirt with a ground sticker on the bag I'm assuming as a joke, I'm wondering how big of a bag of soil would be needed for a suitable ground to withstand a nominal voltage of let's say 120v at a 15 amp peak.

submitted by /u/Arcansis
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Is icing an injury simply a way to alleviate the discomfort of pain, or does it actually contribute to recovery?

Posted: 11 Aug 2018 11:22 AM PDT

This is one of those controversial topics I couldn't believe was even a controversy to begin with. Apparently, there are studies showing that icing does not actually improve the recovery process and questions it's effectiveness.

What gives? For years, I was always told to ice a sprained ankle and tendinitis, yet when I decided to look into why we ice injuries to begin with, it sounds like it's simply to make us more comfortable during the injury. What's more interesting, is apparently it delays the process entirely?

Is there anybody qualified to speak on this subject?

submitted by /u/FungoGolf
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Are there genetic factors in how muscles develop?

Posted: 11 Aug 2018 05:18 PM PDT

Let's just say 2 men the same age decide to work out together. They can both initially bench press 150lbs and want to be able to bench press 200lbs. They perform the exact same exercises daily and commit to the exact same diet.

I'm assuming the two men would not increase their strength at the exact same rate. What factors (genetic, other) would contribute to one person getting stronger more quickly than the other?

submitted by /u/MorePointsThanShalov
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How do repopulation programs prevent inbreeding?

Posted: 11 Aug 2018 10:41 AM PDT

I just read another post about an effective breeding program to increase the population of black-footed ferrets from a couple dozen to over a thousand. In cases like this (or others where there are only a couple animals left) how do scientists prevent inbreeding and other complications of inter-family breeding?

submitted by /u/phylosopher14
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If 2 sets of identical twins have babies together (M1+F1, M2+F2) would the offspring appear to be siblings genetically?

Posted: 11 Aug 2018 11:53 AM PDT

Saw a post earlier of two identical twins marrying 2 other identical twins and it got me thinking. Also if those two first babies don't appear to be genetically related as siblings, what are the chances that 1 or two more may appear to be genetically related that close?

submitted by /u/JGrayBkk
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Saturday, August 11, 2018

Why is it harder to send a spacecraft to the Sun than away from the Sun?

Why is it harder to send a spacecraft to the Sun than away from the Sun?

Why is it harder to send a spacecraft to the Sun than away from the Sun?

Posted: 11 Aug 2018 01:18 AM PDT

Stupid me thinks the gravity would help. Smarter than me says physics knows why.

submitted by /u/DerDonald
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What are the moles on our skin for?

Posted: 10 Aug 2018 08:12 AM PDT

What determines whether water in clouds form ice crystals (snow) or chunks (hail)?

Posted: 11 Aug 2018 06:13 AM PDT

Why did Einstein abandon the Cosmological Constant?

Posted: 10 Aug 2018 09:32 AM PDT

When Hubble discovered conclusively that the Universe was expanding, developing the first estimate of the Hubble Constant, Einstein abandoned the Static-Universe-Causing Constant introduced into his equations.

Why did he not just change the value of it to account for the expansion, and therefore predict what we now call Dark Energy?

Was this because the universe was thought to be expanding at a constant rate, as opposed to the now suspected Accelerating rate; a solution to which his equations could provide (sans Lambda) ?

In Hubble's original model he determined that further galaxies were moving away faster (and therefore accelerating) - is this value is the Hubble Constant?

Am I correct in thinking that an accelerating expansion means a constantly changing Hubble Constant?

Last question: What caused/causes the farther galaxies to move away faster - why are they not moving away at a static rate (before we realized the accelerating expansion)?

submitted by /u/marmiteandeggs
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If radio waves lose power following an inverse square law, how are we able to pick up signals from the New Horizons probe from almost 4 billion miles away?

Posted: 10 Aug 2018 09:42 PM PDT

The transmitter on the probe can't be that powerful, right? You'd think the signal would get lost in the background radio noise of the universe.

submitted by /u/heir-of-slytherin
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How does the nozzle know to shut off when my gas tank is full?

Posted: 10 Aug 2018 03:08 PM PDT

I imagine it would have a sensor that would know when liquid touched it, but how would that work? Whenever I go to the gas station, it's usually just a metal nozzle attached to a hose...

submitted by /u/phreddfatt
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Can we ever reach 0 degress Kelvin?

Posted: 10 Aug 2018 11:15 PM PDT

I was watching a video on Linus Tech Tips showing a quantum computer. He said that the unit gets down to .015 Kelvin. What ways could we achieve 0 degress Kelvin, and if it's not possible why? Also, why does a quantum computer need to operate at such a low temperature?

submitted by /u/jramey2016
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Is there an upper limit to how hot something can be?

Posted: 10 Aug 2018 06:49 PM PDT

We all know there is an absolute minimum temperature, is there an absolute maximum? I just read something that stated the LHC created a plasma that was 5.5 trillion C, albeit for a minuscule amount of time. I can't wrap my mind around that.

submitted by /u/booradleysghost
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Possible to change the temp of a liquid by stirring?

Posted: 10 Aug 2018 10:17 PM PDT

My understanding of temperature is that it is a function of the average kinetic energy, or vibrational amplitude (frequency?), of the atoms or molecules of a substance. If this is correct, is it possible to measurably change the temperature of a liquid by stirring it fast enough?

submitted by /u/stupendous_man55
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How can there be loose boulders on an asteroid?

Posted: 10 Aug 2018 06:13 PM PDT

How does water get inside coconuts?

Posted: 10 Aug 2018 02:12 PM PDT

What is an itch?

Posted: 10 Aug 2018 12:24 PM PDT

What causes the puddle-like reflections on the road ahead of you when you're driving?

Posted: 10 Aug 2018 01:51 PM PDT

Why are some people lefty and others righty. Are there people that are naturally born ambidextrous?

Posted: 10 Aug 2018 01:37 PM PDT

Why do classical objects behave classically and not quantumly?

Posted: 10 Aug 2018 02:00 PM PDT

Seeing as visibly large objects are a collection of smaller systems that behave quantumly, how come as a whole these large objects do not behave quantumly?

submitted by /u/fullwd123
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Is The Universe The Same Age Everywhere?

Posted: 10 Aug 2018 09:09 AM PDT

I tried asking this question before and got shot down and dismissed with some nasty comments. I think it may have been that I either didn't explain myself well enough or give a good example. I think I came across a good example that would explain what I'm getting at quickly and concisely.

In the movie Interstellar there was a planet they named "Miller's Planet" which was a water world that was in a stable orbit very close to the supermassive black hole they named Gargantua. When they went down to that planet and then returned to their main ship, while only a few hours had passed for them, something like 23 years (I may be wrong about how many years) had passed at their main ship. This was because of the warp in space-time caused by Gargantua.

Now, supposing that Miller's Planet had been in orbit around Gargantua for quite a while, say something like how long Earth has been around, 4.5 billion years, would the age of the universe be the same to a civilization that arose on a planet like Miller's as it is to us here on Earth? Which brings about the more fundamental question: is the universe the same age everywhere, if you were able to somehow take a consensus of numerous places in the universe simultaneously? Could other factors, such as space being created within the universe, compress or stretch time so as to make notable differences in whole regions of the universe?

submitted by /u/BAXterBEDford
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Does your body sweat if you are underwater?

Posted: 10 Aug 2018 11:02 AM PDT

Do Queen bees choose the best and most fit partners to breed with?

Posted: 10 Aug 2018 05:17 PM PDT

Do the Queens reject some bees that are, for example, smaller and trying to mate with her? I realize pretty much all of the bees look the same, (besides drones, babies, etc) but some bees can be born with slightly different genetic makeup, like every other living thing?

Does she try to spot out the best genetic partner?

submitted by /u/brodiejess
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What was the thought-process behind the layout of the computer keyboard?

Posted: 10 Aug 2018 03:35 PM PDT

Does the center of mass always coincide with the center of gravity? If they do why aren't they treated as a single entity?

Posted: 10 Aug 2018 06:47 AM PDT

Why is acid rain not really a thing anymore?

Posted: 10 Aug 2018 07:43 AM PDT

It seems like in elementary school we learned about acid rain and how it was kinda common but I haven't seen a single report on it irl.

submitted by /u/007_jbnd5
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Friday, August 10, 2018

If you were a human floating towards the sun, at what distance from the sun would you feel an Earth-like temperature?

If you were a human floating towards the sun, at what distance from the sun would you feel an Earth-like temperature?

If you were a human floating towards the sun, at what distance from the sun would you feel an Earth-like temperature?

Posted: 09 Aug 2018 09:23 AM PDT

Any evidence for fertile hybrid origin for *Homo sapiens* ?

Posted: 10 Aug 2018 05:53 AM PDT

There is increasing evidence being reported in the scientific literature of fertile hybrids forming new species for both plants and animals. Orchids of the genera Epidendrum and Ophrys, rodents Ctenomys, Frogs Phyllomedusa, Guenon monkeys, to name a few examples. A common theme reported is that fertile hybrid formation seems to be associated with ecotones, zones of overlap in species that once had ranges completely separated. Fertile hybrids can result where there is a wide difference in number of chromosomes between parent species.

This leads up to my OP question, is there any evidence to suggest that modern humans, Homo sapiens, has origin as a fertile hybrid species of two proto-human Hominid species that once had allopatric distribution that over time came to overlap, I assume in Afirica ?

submitted by /u/RDDav
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When does the body produce Melanin?

Posted: 10 Aug 2018 06:45 AM PDT

When is the body producing melanin or for the matter is there even a specific time for that? Does Melanin production occur only at a specific time like for example how some body functions only occur while sleeping or is it a process that activates as soon as sunlight hits the skin? Sorry I know this an kinda an uncommon question, maybe even dumb, but I'm really want to know

submitted by /u/rememberthisokokok
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Why does rain fall as individual droplets and not sheets or continuous lines?

Posted: 10 Aug 2018 05:23 AM PDT

Why do dogs' paws develop sooner than other parts of their bodies - leading to puppies with over-sized paws?

Posted: 09 Aug 2018 05:53 PM PDT

How is radiometric dating reliable over billions of years?

Posted: 09 Aug 2018 07:01 PM PDT

I've took chemistry earlier this year, and we had a segment on radiometric dating. One of my friends (who shares the same class) is very religious, and doesn't take science very seriously. When the topic came up at lunch, he expressed serious doubts over whether the decay rates where truly constant. I then told him that scientist had put several radioactive materials under intense conditions (change in temperature, pressure, etc) and that they didn't change. He then told me that we can't "extrapolate from this to deduce they are correct over billions of years". I later googled what he said, and it verbatim came from an anti-science religious website.

What would I say to him to show that we could take that information? One answer I heard was that Radiometric dating was concordant with other dating methods. But I would like some additional help with this.

submitted by /u/TheUltimateMaster98
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What’s the most powerful form of erosion?

Posted: 10 Aug 2018 06:26 AM PDT

Which is most effective at eroding things in nature? Water, salt water, wind? Where is erosion most prevalent and what natural materials are best resistant to erosion?

submitted by /u/Grandmaster_Ninja
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Why do fans sound like white noise?

Posted: 09 Aug 2018 01:06 PM PDT

Why do 45% of people have Hazel colored eyes? In other words, why is hazel the most abundant eye color?

Posted: 09 Aug 2018 07:18 PM PDT

Does sweating become useless when the air is above body temperature?

Posted: 09 Aug 2018 01:05 PM PDT

So if sweat wicks away heat from our warmer body to the colder air then wouldn't that mean that if the air was above our body's temperature that sweating would make our body even hotter?

submitted by /u/DaSkinhead
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Did the 'strength' of seasons vary in the deep prehistory of the Earth?

Posted: 09 Aug 2018 06:34 PM PDT

Seasonal variations in temperature, precipitation and other weather/climatic effects are affected by changes in the Earth's axial tilt and orbital eccentricity, which themselves are known to follow regular cycles with periods in the thousands to hundreds of thousands of years.

But if we look averaged over longer times scales and further back in time, say tens and hundreds of millions of years, what trends occurred with regard to the strength of seasonality?

For example, was the mean of the difference between summer and winter temperatures less or greater than the present day for a given latitude, and if so why? Would an observer at the latitude of today's temperate reasons find the season variation smaller or greater than today?

Would such differences if they existed be down to changes in Earth's orbital parameters (either irregular, or regular but with timescales in the tens of millions of years), or other factors?

(This question was inspired by a comment in Paleobiology 29(1), 2003, pp. 84-104, that says "concomitant with cooling and increased seasonality during the Tertiary", my emphasis)

submitted by /u/SurelyIDidThisAlread
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How do nocturnal animals behave in regions with 24 hours of daylight during parts of the year?

Posted: 09 Aug 2018 11:43 AM PDT

Are there ways or examples of life existing without reproduction?

Posted: 09 Aug 2018 09:25 AM PDT

What is the chemical reaction between kitty litter and motor oil?

Posted: 09 Aug 2018 09:22 AM PDT

I was unaware just how fast kitty litter cleans oil up until yesterday. So i thought I'd ask.

I guess the question is more like " What is happening when kitty litter absorbs oil?"

submitted by /u/TiidBormah
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Is there audible thunder on the other planets of the solar system and if so, how loud does it get?

Posted: 09 Aug 2018 09:08 AM PDT

What causes the crystalline like oxidation on this stainless steel weld?

Posted: 09 Aug 2018 02:30 PM PDT

Picture here. This is a 316L hotwire GTAW weld made using orbital welding. I can see that some of the "shards" have already taken shape while under argon atmosphere, they are just a different shade of silver.

submitted by /u/T-brd
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During the times of the supercontinents, could there have been other, separate land masses that simply no longer exist?

Posted: 09 Aug 2018 08:45 AM PDT

Looking at this amazing interactive map with the kids and referencing the list of supercontinents on Wikipedia, the earth is often shown as having one giant land mass and one giant, uninterrupted ocean. Nothing else. During the times when we know those supercontinents existed, is it still possible there were other, smaller land masses?

submitted by /u/foggybottomblues
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Does natural selection select for imperfect DNA replication?

Posted: 09 Aug 2018 09:25 AM PDT

In order for evolution to occur, there naturally must be mutations in DNA, which can not occur if DNA replication were flawless and DNA were unable to be damaged. But on the other hand, excessive mutation can also lead to a plethora of issues.

So theoretically with excessively perfect DNA replication and preservation, a species would be unable to evolve and therefore eventually succumb to a changing environment, whereas a species with horrendous replication and preservation would be harmed by the mutations themselves.

Does this mean that natural selection therefore selects for a system that preserves and replicates DNA only to some imperfect extent rather than increasingly more accurately and safely?

submitted by /u/Saiky0u
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How much does air temperature effect a forest fire?

Posted: 09 Aug 2018 01:08 PM PDT

Why does the sun turn a dark red color during large fires? (for example the wild fires in SoCal) Also, what makes the sun + sky appear different colors during a sunset?

Posted: 09 Aug 2018 08:22 PM PDT

Does altered weight distribution make a coin unfair? And can we infer the level of unfairness of said coin simply by knowing its weight distribution?

Posted: 09 Aug 2018 09:22 AM PDT

Same question of dice I suppose.

submitted by /u/playfulhate
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Do objects in space no matter what the weight, move at the Same speed if the same momentum force is applied?

Posted: 09 Aug 2018 07:20 PM PDT

Example: one ton cube vs. 100kg cube. Both pushed with the same force. Would they move at equal speeds because weight (and maybe friction?) in space wouldn't matter?

submitted by /u/Synameh
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Cover a Condenser Coil: Get More Liquid R404A in Sight Glass, Not Less. Why?

Posted: 09 Aug 2018 07:14 PM PDT

Specifically, when performing a quick refrigerant level check in low ambient temperatures the procedure is to cover the condenser coil to maintain 300 psi discharge pressure, equivalent to 100°F ambient. Then check receiver tank sight glass for ball float. If the refrigerant is not giving up the energy to the air, why is it changing state?

submitted by /u/zymase
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