What changes does the human body and brain go through between the ages of 18 and 25 ? |
- What changes does the human body and brain go through between the ages of 18 and 25 ?
- How common are planets with tilts like ours? Are seasons a common occurrence in the universe or is earth actually a rare case?
- How do we account for the gain/loss of time in a day due to earthquakes and tectonic activity?
- How do scientists figure out how an extinct language sounded like?
- Does a black hole ever appear to collapse?
- Why do viruses have such complex antigen structures which follow distinct geometrical patterns?
- Can we infer from genetics the baseline lifespan of a person?
- Are migratory bird patterns disrupted when there's a very mild warm winter?
- What kinds of cancer can we diagnose from fossils?
- Why is x^x only defined for x>0?
- Why does adding just a single proton to an atom completely change its chemical and physical properties, and change it into a new element?
- Solving world hunger with enzymes? Why not?
- How come The majority of cars run on internal piston combustion engines over turbofan engines?
- If two people held a string stretching from one side of the universe to the other, would it snap due to the expansion of the universe?
- Why is there mirror-like symmetry on the outside (limbs, face, etc.) yet a lot of internal systems are asymmetric (location of the heart, digestive system, vein structure in opposite limbs, etc.) ?
- What property makes something magnetic?
- How much force would be needed if you were to jump from the moon, back to earth?
- Does a particle with negative energy have a temperature of below absolute zero?
- Why do we define the prime numbers to be greater than 1?
- What is the aperture of the human eye and does our depth of field change in low light?
- What is red shift and what do we use it for?
- How do scientists describe where something is in the universe?
- Is it possible to know if a hash function can have collisions just by observing its algorithm?
- What is the process behind genetically modifying fruits to be seedless?
| What changes does the human body and brain go through between the ages of 18 and 25 ? Posted: 13 Dec 2015 11:38 AM PST I'm 22 currently and feel like a totally different person in the same body compared to who I was at 18. How exactly has my body and mind changed so far and what changes will I go through next as I heard you stop developing at 25 and then you just age. [link] [24 comments]  |
| Posted: 13 Dec 2015 11:56 AM PST |
| How do we account for the gain/loss of time in a day due to earthquakes and tectonic activity? Posted: 13 Dec 2015 01:32 PM PST I'm aware of how earthquakes, such as that last big one in Japan, can cause the earth to spin faster, but I'm wondering how we can account for these moments in time. [link] [13 comments]  |
| How do scientists figure out how an extinct language sounded like? Posted: 13 Dec 2015 11:40 AM PST Decoding an extinct language is amazing. I wonder even if we discover the meaning of symbols, how do we know what sound was associated with that symbol? [link] [18 comments]  |
| Does a black hole ever appear to collapse? Posted: 14 Dec 2015 07:39 AM PST I was recently watching Brian Cox's "The science of Dr Who" and in it, he has a thought experiment where we watch an astronaut traveling into a black hole with a giant clock on his back. As the astronaut approaches the event horizon, we see his clock tick slower and slower until he finally crosses the event horizon and we see his clock stopped. Does this mean that if we were to watch a star collapse into a black hole, we would forever see a frozen image of the surface of the star as it was when it crossed the event horizon? If so, how is this possible since in order for light to reach us, it needs to be emitted by a source, but the source is beyond the event horizon which no light can cross? [link] [1 comment]  |
| Why do viruses have such complex antigen structures which follow distinct geometrical patterns? Posted: 13 Dec 2015 11:54 AM PST |
| Can we infer from genetics the baseline lifespan of a person? Posted: 13 Dec 2015 01:54 PM PST I know that genetics offer clues to the chances of developing diseases and cancers before environmental factors. Can this be extended to general aging to offer an outlook on someone's lifespan? Is there even a genetic component that significantly impacts lifespan? Note: by "lifespan" I mean the time it takes for normal, inevitable aging processes to kill someone; disregarding cancers and other diseases (even typical) [link] [3 comments]  |
| Are migratory bird patterns disrupted when there's a very mild warm winter? Posted: 13 Dec 2015 01:41 PM PST I live in a state that has four seasons, but this winter hasn't come yet and it's still about 60°. I'm wondering if migratory bird patterns are disrupted at all because of this. [link] [7 comments]  |
| What kinds of cancer can we diagnose from fossils? Posted: 13 Dec 2015 12:59 PM PST Is it possible to identify cancers besides bone or exoskeleton neoplasms from fossils? [link] [4 comments]  |
| Why is x^x only defined for x>0? Posted: 13 Dec 2015 07:25 PM PST Basically I was doing a question where I had to sketch xx and after differentiating, saw that the derivative was xx (1+ln(x)). This struck me as weird, as that meant that the derivative was only defined for x>0. My calculator can do integer values for x<0 however. I then graphed it: http://m.imgur.com/DWD8Kmi and saw it was only define for x>0. Shouldn't it have values for the integer values of x<0, or is that still technically not in the domain for x^x . I would've thought the domain would be all integer values of x, and x>0 for any non integer value of x. Thanks for any replies! [link] [7 comments]  |
| Posted: 13 Dec 2015 11:38 AM PST |
| Solving world hunger with enzymes? Why not? Posted: 13 Dec 2015 08:56 AM PST We have pills which give us enzymes, such as lactase, which allow us to digest certain sugars, such as lactose in dairy. Why then is it that we cannot make a pill for cellulase, enabling people to digest the cellulose in plants and possible solving world hunger? Does it have anything to do with the fact that it is never found naturally in the human body? [link] [13 comments]  |
| How come The majority of cars run on internal piston combustion engines over turbofan engines? Posted: 13 Dec 2015 10:02 PM PST how come 99% of fossil fuel driven cars use a piston engine? planes, helicopter, and even tanks have switch to more effective methods, i.e. gas turbine engines, and havn't used piston driven engines since WW2. I know there were projects to make gas turbine cars, Chrysler had a car https://en.wikipedia.org/wiki/Chrysler_Turbine_Car as well as jaguar has a super car https://en.wikipedia.org/wiki/Jaguar_C-X75 and a couple others if you look on the turbo fan wiki page. My question is why arent these engines being fitted into present day cars? and what would the draw backs be of cars with turbofan engines? [link] [6 comments]  |
| Posted: 13 Dec 2015 09:37 PM PST |
| Posted: 13 Dec 2015 08:30 AM PST |
| What property makes something magnetic? Posted: 13 Dec 2015 03:16 PM PST I mean in the sense like more mass = more gravity. I am hoping to understand that more blank = more magnetic. [link] [12 comments]  |
| How much force would be needed if you were to jump from the moon, back to earth? Posted: 14 Dec 2015 02:24 AM PST |
| Does a particle with negative energy have a temperature of below absolute zero? Posted: 13 Dec 2015 08:40 PM PST |
| Why do we define the prime numbers to be greater than 1? Posted: 13 Dec 2015 04:08 PM PST Why don't we define the prime numbers to be greater than 0 instead? Sure, we'd find that 1 is prime now, but how would this impact math and would it be considered bad? [link] [5 comments]  |
| What is the aperture of the human eye and does our depth of field change in low light? Posted: 13 Dec 2015 12:41 PM PST I see a lot of questions and speculation about the "resolution" of the human eye, but as a filmmaker, I'm interested if there's a quantifiable "aperture." When our pupils dilate in low light, does that shrink our depth of field as well? For those that don't know, aperture is a setting in photography and film that determines how much light a camera lets in through its lens. This also can affect the "depth of field". In low light, you use a low aperture which opens up the lens but reduces the amount of objects that are in and out of focus. [link] [2 comments]  |
| What is red shift and what do we use it for? Posted: 13 Dec 2015 10:30 PM PST |
| How do scientists describe where something is in the universe? Posted: 13 Dec 2015 01:16 PM PST To locate a place on earth, we use Longitude and Latitude, and everything works because it's in 2 dimensions and the continents are not constantly moving. But in space, there are 3 dimensions and everything is constantly in motion. So how do scientists describe the coordinates of various stars or planets in the universe? [link] [7 comments]  |
| Is it possible to know if a hash function can have collisions just by observing its algorithm? Posted: 13 Dec 2015 12:38 PM PST |
| What is the process behind genetically modifying fruits to be seedless? Posted: 13 Dec 2015 11:55 AM PST |
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