How did They make the predator's invisibility cloak in 1987 without the use of fancy computer CGI? |
- How did They make the predator's invisibility cloak in 1987 without the use of fancy computer CGI?
- Why do balloons make a noise when they pop, or rather how does the noise get generated?
- Why cant we dissolve toxic or radioactive material to make it harmless?
- How deep down does water exist in our crust?
- How do animals not die of dehydration during hibernation?
- Is the Waterfall Effect (or Motion Aftereffect) possible for auditory stimuli?
- Why are the younger, central stars of the Milky Way more metal-rich than the older stars that have drifted towards the outer edges?
- Did we use to have a universal language, or did different groups of people "evolve" language on their own?
- Research has shown that brighter and cooler light affects your circadian clock and alertness. Does this effect vary between direct/foveal vision exposure vs. peripheral?
- Why is it so difficult to dramatically increase the resolution of electromagnetic wave modulation/demodulation to increase RF bandwidth (that is increase data transfer capabilities)?
- Is there any consensus regarding radiation doses under 100mSv?
- [Biology] What are the effects of Amphetamines/Dextroamphetamines on male fertility?
- Study "Caffeine Caused a Widespread Increase of Resting Brain Entropy" Well...what the heck is resting brain entropy? Is that good or bad? Google is not helping
- What is the earliest stage in human embryonic development in which we can detect a sleep cycle?
- How many photons can an atom produce?
- Why does solder flow onto stuff?
- I have an opal ring. Dim memories from Chemistry class long ago tell me not to get it wet, but other advise tells me water is fine, it is heat that kills an opal. What is an opal made of, and what can degrade the colour?
- Why do older end stage renal disease (on dialysis) patients have blue eyes?
- Why are some ions more soluble than others?
- Where does sediments comes from?
- How did Stephen Hawking prove his theory of Hawking radiation?
| How did They make the predator's invisibility cloak in 1987 without the use of fancy computer CGI? Posted: 12 Feb 2018 08:14 PM PST |
| Why do balloons make a noise when they pop, or rather how does the noise get generated? Posted: 12 Feb 2018 09:26 PM PST |
| Why cant we dissolve toxic or radioactive material to make it harmless? Posted: 13 Feb 2018 04:19 AM PST Im curious.. basically everything known to human has a specific arrangement of atoms or molecules. Why are we not able to lets say split up oil or plastic into an endproduct harmless to earth and its creatures? [link] [comments]  |
| How deep down does water exist in our crust? Posted: 12 Feb 2018 03:56 PM PST Does the earth have a certain "limit" where water can no longer seep into its rocks or stay inside little caverns? If so, as a follow up question, can life exist in those deepest areas in the earth that have water? [link] [comments]  |
| How do animals not die of dehydration during hibernation? Posted: 13 Feb 2018 04:46 AM PST I get that squirrels and bears can store nuts and berries and other food etc. But how do they stay hydrated? they can't store water in their burrows can they? [link] [comments]  |
| Is the Waterfall Effect (or Motion Aftereffect) possible for auditory stimuli? Posted: 12 Feb 2018 08:11 AM PST So, I started watching videos (mostly hour long lecture series on YouTube with lots of talking) in 2x speed a while back. I noticed something weird every time I did so: after finishing the videos or pausing them somewhere in between, I observed that my inner monologue (the voice in my head) is slowed down. For a few moments it felt as though I was listening to audio on a tape recorder with low battery. I also felt a slight lag in my tongue each time as though I suddenly had a thicker tongue. This lasted just for 1-2 minutes after (sometimes not even) and then was back to normal. It would also help if I spoke to myself out loud in normal pace. I would say I'm kind of used to it now (I've also been listening to podcasts on 2x speed) and it doesn't happen as much anymore. But, I was wondering if this is an effect similar to the waterfall effect in vision. Essentially, sped up audio is causing me to perceive my own audio (?) thoughts slower than usual. Could this be analogous to seeing grainy upward motion after staring at a waterfall (downward motion) for a while? P.S.: Is this a normal/common experience or am I broken? [link] [comments]  |
| Posted: 13 Feb 2018 06:58 AM PST |
| Posted: 12 Feb 2018 08:26 AM PST For example I know a lot of languages have "ma" or "mama" to mean "mother", a long time ago, was something like "ma" the universal word for mother? Or did language happen after we spread out a bit more? Google isn't helping me much here, mainly talking about Esperanto and potential future universal languages. [link] [comments]  |
| Posted: 12 Feb 2018 06:37 AM PST Say you are designing a light fixture for a desk, with a fixed number of lumens. Would focusing all this light to the center of the desk where the user is directly looking at most of the time, have greater effect than spreading the light evenly between all surfaces visible with direct and peripheral vision? Assuming the light source itself is not within peripheral. [link] [comments]  |
| Posted: 12 Feb 2018 08:59 AM PST I'm saying, why can't we make the hardware able to discern the splitting of the frequency into smaller parts if using FM modulation, and why can't we make the hardware able to discern even smaller changes in amplitude with AM modulation? I understand that it would probably be easier to do with FM modulation over AM modulation, and I think that it would be the best way to fix our bandwidth problems. [link] [comments]  |
| Is there any consensus regarding radiation doses under 100mSv? Posted: 13 Feb 2018 12:07 AM PST I have no knowledge in the field but after having a CT scan I don't seem to understand the exact risks (and what's worse, not even the doctors doing the scan, their answers were very vague). Some say any radiation is a definitive increase in cancer. Just 10 flights from NYC to LA can cause one cancer in 30 000. This seems much higher than the actual risk of a plane crash but nobody really thinks about it. Some say there has been no evidence of increased cancer risk under 50mSv, some even up this limit to 100mSv. Even more strange, some say low doses (like under 10mSv) might actually be beneficial. Don't we have answers from the studies on atomic bomb survivors to solve this problem? Even those that say a CT risk is a definitive risk don't seem to agree on what's the risk. For the same type of CT scan and patient age there are estimates like in 1 in 200/500/3000. Even for a dose of 100mSv, there are different numbers, like 0.4% to 1% increase in absolute cancer risk. This range is huge and very disconcerting to a patient. Have animal studies been done on this matter? Like run animals through CT scans to get an answer? [link] [comments]  |
| [Biology] What are the effects of Amphetamines/Dextroamphetamines on male fertility? Posted: 13 Feb 2018 07:35 AM PST Have any studies been published providing results that show the outcome? [link] [comments]  |
| Posted: 13 Feb 2018 07:34 AM PST study shows increased resting brain entropy with caffeine ingestion https://www.nature.com/articles/s41598-018-21008-6 first sentence indicates this would be a good thing
however if you google 'resting brain entropy' you will see high RBE is associated with alzheimers. so...is RBE good or bad? caffeine good or bad for the brain? [link] [comments]  |
| What is the earliest stage in human embryonic development in which we can detect a sleep cycle? Posted: 12 Feb 2018 05:07 AM PST |
| How many photons can an atom produce? Posted: 12 Feb 2018 07:52 PM PST I was reading the comments on this post regarding the picture of a positively charged strontium atom when I read /u/spacemoses question, the same as the title of this post. I crudely understand what /u/CasanovaJones was explaining about how the camera picked up the excited photons through the lense to see a relative location of the strontium atom but I have more questions. So, I did what /u/JMoneyG0208 suggested and asked you guys, /r/askscience! So my question is how many photons are being emitted by the strontium atom to capture this picture and in how long of a time period? Is the dot we see in the picture what the atom would actually look like or is it just light given off from one atom? How would an atom give off photons and why would they do it? Also how precise is the atom's location that the light shows? And could you see this light in person or only in the picture? Thanks! [link] [comments]  |
| Why does solder flow onto stuff? Posted: 13 Feb 2018 05:17 AM PST When soldering I notice that the molten solder will sometimes flow from the hot iron onto a wire or metal part. It's like the solder is pulled onto the part. Stranded wire is a good example since it almost soaks up the solder. [link] [comments]  |
| Posted: 12 Feb 2018 07:07 AM PST What are opals made of? Do they turn cloudy (losing their colour as they transform) from exposure to either water or low humidity hot air? I really don't want to lose this ring, and taking it off and on ups my chances of losing it. Can I wash my hands ten times a day with my opal ring on? Do the dishes wearing it? Should I be keeping it away from hot air dryers? [link] [comments]  |
| Why do older end stage renal disease (on dialysis) patients have blue eyes? Posted: 12 Feb 2018 06:42 AM PST I'm a second year PA student doing rotations and seeing dialysis patients. I've noticed that many of the older black patients have blue irises. What causes this? [link] [comments]  |
| Why are some ions more soluble than others? Posted: 12 Feb 2018 04:41 PM PST Does it relate to periodic trends, or is it completely different for every ion? What causes this difference? [link] [comments]  |
| Where does sediments comes from? Posted: 13 Feb 2018 01:59 AM PST Hi, You can see scientist telling you the athmospheric content due to color in sediment layers. Where do they come from? I get that it is material piling up over time. But those sediments layer are several meters high. It is like the earth is gaining material, growing. Thanks. [link] [comments]  |
| How did Stephen Hawking prove his theory of Hawking radiation? Posted: 12 Feb 2018 08:08 AM PST I know it has something to do with light rays moving parallel to each other at the event horizon of a black hole. But I don't understand that. Please help. [link] [comments]  |
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