Have there been any "new" craters on the Moon observed in recent history? |
- Have there been any "new" craters on the Moon observed in recent history?
- What’s the difficulty in making a pill that actually helps you lose weight?
- Why don't we make vaccines for plants?
- can exposure to small viral loads of covid-19 provide immunity?
- My understanding is that the COVID mRNA vaccine uses modified nucleotides to prevent an immune response to the RNA and to increase translation. After the vaccine mRNA is translated, will these modified nucleotides be reused in other RNA strands and, if so, would that alter the way those RNAs behave?
- Why do flames stick together?
- What happens when a piece of debris punctures an astronaut's suit (and cuts open a blood vessel) in outer space?
- What is the best way to measure the true density of solid powder?
- Could a virus become immune to vaccination?
- How did researchers avoid triggering a severe immune reaction with mRNA vaccines?
- How to rocket engines use liquid fuel while in zero gravity?
- Will birds raise the young of other birds, even if the other bird is not a cuckoo?
- Would it be possible to treat a viral infection by taking a drug that encourages maladaptive mutations?
- Has a change in greenhouse gases emission been noticed due to lockdowns around the world? If so, how significant?
- Will Covid-19 have a significant impact on the global population balance? How does it’s death rate compare to the global birth rate?
- What regions on earth are ice- or snow-covered all year long?
- How can we know the half-life of Rubidium-87?
- Does the air temperature affect the speed at which smell spreads?
- Often, when reading about ice ages,there will be a mention of the thought, that there has only ever been 1 ice age with breaks. What are the arguments for this?
| Have there been any "new" craters on the Moon observed in recent history? Posted: 26 Dec 2020 07:08 PM PST As in from a recent impact, not just ones that have been mapped. Thanks! [link] [comments]  |
| What’s the difficulty in making a pill that actually helps you lose weight? Posted: 27 Dec 2020 03:05 AM PST I have a bit of biochemistry background and kind of understand the idea, but I'm not entirely sure. I do remember reading they made a supplement that "uncoupled" some metabolic functions to actually help lose weight but it was taken off the market. Thought it'd be cool to relearn and gain a little insight. Thanks again [link] [comments]  |
| Why don't we make vaccines for plants? Posted: 27 Dec 2020 04:38 AM PST I was watching a video recently, and it talked about how a certain cultivar of bananas, gros micheal, was basically wiped off the face of the earth. And how the current popular cultivar, cavendish, is now being hit by the same disease. The fact that we invaded honduras 7 times for bananas and coined the term banana republic for love of the fruit, yet we don't have a solution for this banana plague that is obliterating them from the face of the earth boggles my mind. I assume there is a good reason for this? A reason we can't give a tree a shot or inoculate a grain against blight? [link] [comments]  |
| can exposure to small viral loads of covid-19 provide immunity? Posted: 27 Dec 2020 07:54 AM PST I read that in order to contract the disease you must be exposed to a certain level of viral load, i.e. by spending more than a few seconds with a sick person. this implies that if a small amount of the virus finds its way to someone's body his immune system an defend itself from it. does this also imply that if an individual gets exposed to small viral loads could develop antibodies against covid-19 ? [link] [comments]  |
| Posted: 26 Dec 2020 09:31 PM PST |
| Posted: 26 Dec 2020 11:28 PM PST I understand why water sticks together in droplets (hydrogen bonds, surface tension, etc) but not why two flames conjoin into a single flame. Please explain [link] [comments]  |
| Posted: 27 Dec 2020 03:43 AM PST In the movie 'Midnight Sky', one of the astronauts dies after bleeding into their suit shortly after a piece of shrapnel flew into it. She noticed some droplets of blood floating past her, and then went into the spacecraft where, after pressures were equalized, the helmet was removed and blood flew out. It looked like she bled out within 5 minutes. Assuming the technology is the same as ours', is this accurate? When a system of high pressure such as the cardiovascular one, comes into contact with space, won't the blood be sucked out quicker? Also, since the lower part of the space suit was communicating with the helmet, wouldn't she stop breathing as soon as the suit was punctured in outer space? [link] [comments]  |
| What is the best way to measure the true density of solid powder? Posted: 26 Dec 2020 11:59 PM PST What is the best way to accurately measure the true density of solid powder that is non-soluble in water, soluble in alcohol and less density than water? I would like it to be not too expensive and don't use large quantity to compensate the errors. I have used the 10ml-pycnometer with water, but since the powder float, the error is to large no matter how careful I tried not to let the powder came off when closing the lid. Gas pycnometer is too expensive for me. Or using large pycnometer might be the best way for me. Thank you. [link] [comments]  |
| Could a virus become immune to vaccination? Posted: 26 Dec 2020 06:20 PM PST |
| How did researchers avoid triggering a severe immune reaction with mRNA vaccines? Posted: 26 Dec 2020 06:23 PM PST Just read this great article (https://www.statnews.com/2020/11/10/the-story-of-mrna-how-a-once-dismissed-idea-became-a-leading-technology-in-the-covid-vaccine-race/) detailing the development of the COVID vaccine, had my mind blown by how crazy/smart the development of this vaccine was. It mentioned one of the big obstacles in animal trials was avoiding a dangerous immune response, but the solution was glossed over. The article mentioned the vaccines developed just coded for the spikes, so was the solution to use just a tiny amount of mRNA so it would fly under the radar and avoid triggering an allergic reaction? [link] [comments]  |
| How to rocket engines use liquid fuel while in zero gravity? Posted: 26 Dec 2020 06:24 PM PST With the liquid fuel just floating around, how can a rocket light up its engines again? Is there some sort of RCS thruster activation that needs to occur before the fuel is in its proper place? [link] [comments]  |
| Will birds raise the young of other birds, even if the other bird is not a cuckoo? Posted: 26 Dec 2020 12:33 PM PST |
| Posted: 26 Dec 2020 03:40 PM PST Viruses replicate inside of us millions/billions(?) of times and mutations happen often. Could we affect the replication processes to cause mutations that affect virus' transmissibility, or number and severity of symptoms? And could this be done in a way that allows us to treat viruses generally, and not have to create specific antiviral for each new virus? [link] [comments]  |
| Posted: 26 Dec 2020 09:04 AM PST |
| Posted: 26 Dec 2020 01:39 PM PST |
| What regions on earth are ice- or snow-covered all year long? Posted: 26 Dec 2020 10:25 AM PST I wanted to know which regions on our planet are visibly snowy or icy the whole year. Found out there is the snow-line concept where there is snow over a certain ground height. That's a good start. So two questions: 1. Is there no flatland with all-year snow? Only hills? 2. Is there like a map out there where I can see all the snowy/icy regions on earth that are never free of snow or ice? Google mentions a lot of places but a world map would be awesome! [link] [comments]  |
| How can we know the half-life of Rubidium-87? Posted: 26 Dec 2020 01:08 PM PST As the title says, I wonder how scientist can know the half-life of Rubidium-87, since it is about 49 billion years? I am really not a clever guy when it comes to this part of science, but I just read about it, and came to think about how it is possible to know/confirm this? (Sorry for any grammar mistakes, but english is not my first language) [link] [comments]  |
| Does the air temperature affect the speed at which smell spreads? Posted: 26 Dec 2020 03:33 AM PST |
| Posted: 26 Dec 2020 10:16 AM PST Whenever I see this argument, it is never mentioned why this could be considered as a possibility other than multiple ice ages. However, whenever anyone asks a similar question, it is often answered with something akin to: "Think of it as a football match with half-time. Second half is still the same football game." I realize this, but I have never been told that there could be anything other than a philosophical aspect to it. Because, at the end of the day I have never been presented with anything other than comparisons to other stuff, and nothing else. [link] [comments]  |
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