How is it known that everyone with blue eyes has one single ancestor, rather than this mutation occurring in multiple individuals at many different times? |
- How is it known that everyone with blue eyes has one single ancestor, rather than this mutation occurring in multiple individuals at many different times?
- AskScience AMA Series: I am Dr. Matt McCarthy, a staff physician at NewYork-Presbyterian Hospital, and I hunt superbugs for a living. In my new book, Superbugs, I give a behind-the-scenes look at the search for new cures for these deadly microbes. AMA!
- Why does a dead battery work for a second when I remove it and put it back in the remote?
- On HBO’s Chernobyl, a pregnant woman is exposed to radiation by contact with her irradiated husband. When she gives birth the baby dies. It’s said the baby absorbed all the radiation from and the mother was saved because of this. What mechanism is this caused by? Is it potentially true?
- Are ant scent trails directional? When ants follow a scent trail to a food source and back to their colony, how do they avoid getting turned around and going the wrong direction?
- Iodine tablets not necessary for aged 40+ after a nuclear accident?
- Is the dilution of any acid exothermic?
- What will happen if a coastal city floods while the water is full of toxic algae?
- How does an Oasis city in deep arid desert keep its waterbody from becoming a salt lake? And how do acient people live around oasis prevent waterbody contamination from thousands years of agriculture and sewage?
- Is the identity of dark matter completely unknown, or is it likely known, and we're just waiting for proof and scientific consensus?
- Are there seasons in other planets?
- How did astronomers figure out the shape of the Milky Way?
- Are we being duped into buying beauty products?
- Does the movement of galaxies and other objects in outer space affect the way photos of galaxies that are light years away from earth are taken? And is the reason that this pictures take a long time to complete?
- What is Loop Quantum Gravity?
- How much extra visible light does the ozone hole let in?
- Do goosebumps appear in the same location every time?
- What is "nothing" made of?
- How do mosquitoes know what is living and what is not living (so they can enjoy [high quality all natural] blood), even in the dark?
- With home breaker boxes, why do they not provide any form of a reading prior to 'blowing'?
- What happens to an atom whose electrons have ascended to a higher orbit due to light absorption, after said light is switched off?
- Oftentimes we hear "He/she's a fighter" when someone is critically injured or unwell, but still hanging in. How much does willpower of that individual actually matter at such a time?
| Posted: 10 Jul 2019 11:45 PM PDT |
| Posted: 11 Jul 2019 04:00 AM PDT Hi, Reddit! I am Dr. Matt McCarthy, staff physician at NewYork-Presbyterian Hospital and assistant professor of medicine at Weill Cornell, where I also serve on the ethics committee. In my new book, Superbugs, I take readers behind the scenes of a clinical trial involving a new treatment for lethal, drug-resistant microbes. I also share the history of antibiotics and the ethical debates involved in cutting-edge medicine, as well as the stories of the patients we treated with the drug during the trial. Superbugs are everywhere (check out my recent op-ed). If you have questions about my research, superbugs, medical ethics, or generally working in a hospital, I am here for it! Here's my proof, see you at 12pm ET (16 UT), AMA! [link] [comments]  |
| Why does a dead battery work for a second when I remove it and put it back in the remote? Posted: 11 Jul 2019 01:09 AM PDT |
| Posted: 10 Jul 2019 09:56 PM PDT |
| Posted: 11 Jul 2019 06:46 AM PDT Also, what cleaning product can I use to remove that trail so the damn things stop coming into my kitchen? [link] [comments]  |
| Iodine tablets not necessary for aged 40+ after a nuclear accident? Posted: 11 Jul 2019 05:33 AM PDT People below age 40 should take iodine supplements in the event of a nuclear accident. To block iodine 131 absorption in the thyroid. Yet older people shouldn't do it, because they have a lower chance of developing cancer in the thyroid and have an increased risk of negative side effects. The wiki page for this type of cancer says it most commonly occurs between the age 35 and 65. How is this not a contradiction? Doesn't this mean they have an even higher chance? [link] [comments]  |
| Is the dilution of any acid exothermic? Posted: 11 Jul 2019 04:17 AM PDT From what I know, the dilution of sulfuric acid is exothermic due to the ionoziation of the acid, H2SO4 -> H+ + HSO4- HSO4- -> H+ + SO42- where the equation H+ + H2O -> H3O+ ...is highly exothermic. Does this apply to all other acids? For example, In the dilution of hydochloric acid, the acid ionizes like so: HCl -> H+ + Cl- H+ then reacts with water, so would the dilution of any acid be exothermic? If so, would they all be exothermic to the same degree i.e. same amount of energy released per mole of H+ ions? [link] [comments]  |
| What will happen if a coastal city floods while the water is full of toxic algae? Posted: 10 Jul 2019 11:34 AM PDT Right now Barry is on track to become a hurricane and hit New Orleans. There is also a large toxic algal bloom in the Gulf Coast which has shut down all the beaches in Mississippi and a dozen beaches in Louisiana. Additionally, a toxic algal bloom has been seen in Lake Pontchartrain. What happens if Barry hits New Orleans and the city floods with this water? Does it create additional hazards and if so how do public health and emergency services recommend citizens respond? Relatedly, with all of this rain should we expect these agal blooms to grow? Or do huge storms like hurricanes disrupt this? [link] [comments]  |
| Posted: 11 Jul 2019 12:45 AM PDT |
| Posted: 10 Jul 2019 10:25 PM PDT For example, if dark matter is bread, then it's not completely unknown (but still surprising), and we're just waiting for someone to prove it. [link] [comments]  |
| Are there seasons in other planets? Posted: 11 Jul 2019 12:59 AM PDT I just binge watched Evangelion. The ed (Fly Me to the Moon by Frank Sinatra) had the lyrics "let me see what spring is like on a, Jupiter and Mars" Just a really stupid question from a 17 year old [link] [comments]  |
| How did astronomers figure out the shape of the Milky Way? Posted: 11 Jul 2019 05:57 AM PDT |
| Are we being duped into buying beauty products? Posted: 10 Jul 2019 11:42 PM PDT Is it truly nonsensical to apply treatments to your skin and hair? Am I really wasting money on vitamin e oil, and other beauty and health products? I was told today that the body doesn't absorb from the outside, rather only from within. I was all on board believing that, but now I'm thinking about all the Epsom soaks I take and keratin hair treatments... what's the dealio? [link] [comments]  |
| Posted: 11 Jul 2019 02:10 AM PDT |
| Posted: 11 Jul 2019 04:34 AM PDT Can you please answer this questions:
[link] [comments]  |
| How much extra visible light does the ozone hole let in? Posted: 11 Jul 2019 04:34 AM PDT Would the ozone hole let in more light on the violet side, and cause a visible change in natural lighting? [link] [comments]  |
| Do goosebumps appear in the same location every time? Posted: 11 Jul 2019 04:02 AM PDT Say you are cold and have goosebumps on your arms. The next time you get goosebumps on your arms will the individual 'bumps' be in exactly the same place? [link] [comments]  |
| Posted: 10 Jul 2019 09:31 PM PDT So if I had a vaccuum chamber and pumped all of the air out (which would be o2 n2 h2 etc) to an absolute vacuum, then the chamber should then be free of any molecules. Is there anything in the now created void/ making up the space? Which brought me to space.. so that's a vaccum, and uv rays, light photons, solar radiation etc. travel from the sun.. but is there no real medium they travel through? Just thinking, and I couldnt come up with an answer based off my knowledge lol Thanks! [link] [comments]  |
| Posted: 10 Jul 2019 09:07 PM PDT |
| With home breaker boxes, why do they not provide any form of a reading prior to 'blowing'? Posted: 10 Jul 2019 11:14 PM PDT We constantly pop a breaker that's rated for 15A/110V as it's shared between three rooms. The box was replaced in full about two years ago, breakers and all, but it basically looks the same as the previous 20+ years. A quick Google search doesn't seem to show anything on the market that could provide an 'active load' reading and with the technology being available, it's a bit surprising that households seem to be lagging behind. At work I see it on PDUs in datacenters, and most are rated for much higher current overall (commonly 15A per phase, three phase), so why isn't this more common in standard homes that may be pulling far less power? Is it even possible to incorporate in such a small box/breaker or is it more of a safety concern? [link] [comments]  |
| Posted: 10 Jul 2019 10:46 PM PDT So I was just reading that the reason objects appear different colours to us, is because the molecular makeup of the material the object is made from will cause certain wavelengths of light to be absorbed, and others to be reflected This happens because the electrons surrounding the atoms/molecules can use the energy from the light to "jump" to a higher orbit, but only if the energy of the photon of light that hits it perfectly matches the amount of energy needed to make the jump. This leads to only specific wavelengths being absorbed by the material. Wavelengths of light that don't correspond with the energy difference needed for an electron to ascend to a higher orbit are reflected, this giving an object its colour. My question after all that is: what happens to all those electrons that are now in a higher orbit once the light is turned off? Do they jump back down to their ground state? And if so, how is the energy released to allow this? Light? Wouldn't that cause everything to glow after the lights are turned out? Or cause everything to look white as electrons jumping between orbits would be absorbing and releasing the same wavelengths of light, cancelling each other out? And what about the atoms whose electrons have already ascended to a higher energy orbit but are still being bombarded by photons? Can the electrons keep achieving higher and higher energy states? Obviously I'm very confused, any help would be much appreciated 😅 [link] [comments]  |
| Posted: 10 Jul 2019 12:34 PM PDT If a person internally were to think about giving up, do the bodily functions like the immune system or the repair and recovery systems also, in a sense, stop working as hard? [link] [comments]  |
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