What causes hair to turn grey? |
- What causes hair to turn grey?
- AskScience AMA Series: We are scientists who have just announced new discoveries from NASA's Parker Solar Probe mission to the Sun. Ask us anything!
- In an asymmetric encryption algorithm, can a private key be used to encrypt information with a known outcome to prove that a message came from a trusted source, or would this reveal how to decrypt all messages encrypted with the public key?
- Are elements atomic numbers also a ranking of how common they are?
- When you apply oil to the skin, it is absorbed. Is this oil metabolized like normally ingested oil? In other words, can you get fat from a massage?
- Why is there a shingles vaccine but not a herpes vaccine?
- What happens to the body (including mind) after years of sustained alcoholism?
- In the context of the Ohio abortion bill, how is the reimplant of the embryo different than a surrogacy?
- In an non ideal transformer that has 1 to 1 primary to secondary ratio, is the power loss seen as reduced voltage on the secondary , reduced current or both equally reduced?
- What percentage of the human genome is actually useful/expressed?
- How do I determine if a Fourier Transform graph is chaotic?
- Can you spin a container filled with water fast enough, to create a vacuum in the centre of the container?
- How does lucid dreaming affect the activation of the sympathetic and parasympathetic nervous system?
- How did haemoglobin evolve? What was first, haemocyanin or haemoglobin?
- What is happening as a baby learns to talk? Specifically, what is happening in the brain and what is happening physically in the tongue/mouth/vocal chord area?
- How do aircraft carriers stay so high above the water compared to smaller and much less massive ships?
- Would an object burn up in the atmosphere if it fell straight down from a normal orbital height, only due to gravity (zero orbital velocity)?
- How are space elevators supposed to maintain their speed when transporting mass from earth to the orbit?
- Is the higher sea level during the Medieval Warm Period a result of melting glaciers?
- Do animals designed to live in snowy terrain have the same amount of night vision as tose in other environments?
- Are Apollo-type asteroids carbonaceous?
- Was Cameroon the last home of the Western Black Rhino before its extinction?
- Is it possible to get addicted to a placebo?
| What causes hair to turn grey? Posted: 04 Dec 2019 02:44 PM PST |
| Posted: 05 Dec 2019 04:00 AM PST We have just announced the first results from Parker Solar Probe, NASA's mission to touch the Sun! Parker Solar Probe has flown closer to the Sun than any spacecraft has gone before, and its data from this region has given us insight into how the Sun releases the solar wind, clouds of solar material, and powerful bursts of energetic particles. The spacecraft also sent new views of what the dust environment is like near the Sun. These findings are based on data from the spacecraft's first two orbits. With 21 more solar flybys scheduled, there's still much more to learn. Ask us anything about what we've learned so far and what we're looking forward to studying next! Joining us today at 2 p.m. ET (19 UT) are:
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| Posted: 05 Dec 2019 03:45 AM PST |
| Are elements atomic numbers also a ranking of how common they are? Posted: 05 Dec 2019 08:01 AM PST So, for example, Hydrogen is the most common element in the universe, Helium is second... does that mean Potassium is the 19th most common element in the universe? [link] [comments]  |
| Posted: 04 Dec 2019 04:01 PM PST |
| Why is there a shingles vaccine but not a herpes vaccine? Posted: 04 Dec 2019 05:25 PM PST And if a herpes vaccine came out, could it help people already infected? [link] [comments]  |
| What happens to the body (including mind) after years of sustained alcoholism? Posted: 04 Dec 2019 05:23 PM PST Not asking for medical advice nor any other kind of substance abuse advice. EDIT: conciseness [link] [comments]  |
| Posted: 04 Dec 2019 04:33 PM PST Sorry if I got any terminology wrong, it's not one of my strengths. Everyone keeps saying it's impossible to perform what the bill requires but it seems similar to how I imagine a surrogacy implantation in my head. [link] [comments]  |
| Posted: 04 Dec 2019 08:47 PM PST |
| What percentage of the human genome is actually useful/expressed? Posted: 04 Dec 2019 01:50 PM PST As I understand it, the human genome is the result of millions of years of random gene mutations. Some sequences of nucleotides in DNA get read and synthesized into proteins that act like machines and actually DO things to express that gene in the resulting organism, but if this is the result of randomness then there must be significant wasted real estate, so to speak. Sequences of nucleotides that try to build impossible or unstable proteins that immediately break down and do nothing, AKA garbage. How much of the genetic material is actually expressed? [link] [comments]  |
| How do I determine if a Fourier Transform graph is chaotic? Posted: 04 Dec 2019 11:04 PM PST I understand that the graph will appear to not have any periodicity to it, I'm just trying to understand at what POINT can we say it has shifted from periodic to chaotic. [link] [comments]  |
| Posted: 04 Dec 2019 03:01 PM PST |
| How does lucid dreaming affect the activation of the sympathetic and parasympathetic nervous system? Posted: 04 Dec 2019 03:26 AM PST |
| How did haemoglobin evolve? What was first, haemocyanin or haemoglobin? Posted: 04 Dec 2019 04:38 PM PST Most invertebrates have haemocynanin which I understand uses copper instead of iron, but somewhere down the evolutionary line these two molecules had to diverge. How did this happen and if one came from the other, how? [link] [comments]  |
| Posted: 04 Dec 2019 01:11 PM PST |
| Posted: 04 Dec 2019 10:21 AM PST |
| Posted: 04 Dec 2019 04:20 PM PST See title. If you dropped an object with zero orbital velocity from low earth orbit, would it burn up on reentry or would it not build up enough speed to create the heat when it hits the stratosphere? [link] [comments]  |
| Posted: 04 Dec 2019 10:34 AM PST Because of newtons first law, the object that is being moved towards the counterweight would require horizontally (or rotational) effecting force in order to maintain it's route. I came into this conclusion because the counterweight orbits the anchored body and it should turn around the body faster than the body itself and applying vertical force to the climber doesn't cause it to gain horizontal (in this case rotational) speed. The speed required must be gained by slowing the counterweight which could lead to an imbalance and possibly break the whole system If what I said was true, how are physicists planning to overcome the slowing caused by carried objects? [link] [comments]  |
| Is the higher sea level during the Medieval Warm Period a result of melting glaciers? Posted: 04 Dec 2019 01:16 PM PST In this video (at 4:10) the creator uses Pevensey Castle in the UK as an example of showing how sea levels change over a period of time and this is proof that the climate crisis is a hoax. During the era of the castle it was surrounded by water, but today it's a mile away from the coast. Looking at the map, I'd be lead to believe the reason for the difference is more natural (coastlines tend to change over time) than a result of melting glaciers. But I don't have the historical, geological know-how to back that up. The video: https://youtu.be/-j0ykCVAQVM?t=250 Pevensey Castle https://en.wikipedia.org/wiki/Pevensey_Castle [link] [comments]  |
| Posted: 04 Dec 2019 07:53 AM PST I was looking outside and noticed that it was a lot brighter, which I attributed to the freshly fallen snow and how it might reflect light better. This led me to wonder if animals that lived on snowy environment needed the same kind of vision in the dark as those adapted to other terrain. [link] [comments]  |
| Are Apollo-type asteroids carbonaceous? Posted: 04 Dec 2019 11:22 AM PST |
| Was Cameroon the last home of the Western Black Rhino before its extinction? Posted: 04 Dec 2019 04:18 PM PST |
| Is it possible to get addicted to a placebo? Posted: 04 Dec 2019 05:32 AM PST |
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