- AskScience AMA Series: Hey Reddit! We are NASA scientists that study Earth systems, how they're changing, and how they impact our favorite foods. Ask us anything about agriculture, drought, and food security!
- Are there viruses who can replicate in the human body without damage?
- How did the jawless vertebrate immune system evolve?
- How is addiction and dependence differentiated?
- How exactly does training for muscle hypertrophy work? Why do muscles grow the best at a certain intensity and certain volume?
- If we don't burn fossil fuels is the accumulated carbon lost forever?
- Are people with aphantasia less prone to hallucinations?
- Are there any creatures with a single type of cone in their eye?
- If Haiti and the Dominican Republic share the same island, why does Haiti seem to experience more Earthquakes and Hurricanes?
- What is the descend speed of submarines ?
- How are electrons replenished when an element gives off electrons?
- In the 40s the US worked to eradicate malaria in the South through spraying of pesticides (like DDT), draining wetlands, and using things like mosquito nets. But mosquitoes (including ones of species that transmit malaria) still exist in the South. How was just the disease eradicated?
- How important are black ants to ecosystems in urban areas? What would happen if they were eradicated?
- How did the Island of Sulawesi in Indonesia form?
- How do they measure the trajectory/map the movement of subatomic particles, like in the LHC?
- What do the studies indicate about covid-19 vaccines effects on fetus and babies?
- A black hole can have greater gravity than objects bigger than it?
- What are symptoms of Silver poisoning besides argyria?
- Do plants like sundews(drosera), which grow worldwide, come from the same original plant? Or did they all independently adapt and mutate in a similar fashion?
- When a vaccinated person is infected with a strain of a virus different from the one they were vaccinated against, do they create different anitbodies?
| Posted: 17 Aug 2021 04:00 AM PDT When you think of NASA, you might think of rockets and space exploration, but did you know we play a big role in the food you eat? From space, Earth satellites have a unique view of fishing, ranching and farming our favorite foods, fruits, veggies, and grains! NASA data helps farmers and local communities address issues like water management, crop-type identification, land use, and sustainable farming processes. As the climate continues to warm, drought preparedness and food security continue to be challenges that NASA data helps overcome. We're here from 4pm - 5pm ET (16-17 UT) to answer your questions about agriculture, drought, food security, and NASA data. Ask us anything!
Username: /u/nasa [link] [comments]  |
| Are there viruses who can replicate in the human body without damage? Posted: 16 Aug 2021 03:41 PM PDT |
| How did the jawless vertebrate immune system evolve? Posted: 17 Aug 2021 07:16 AM PDT "Jawless vertebrates do not have immunoglobulins (Igs), the key proteins to B-cells and T-cells. However, they do possess a system of leucine-rich repeat (LRR) proteins that make up variable lymphocyte receptors (VLRs). This system can produce roughly the same number of potential receptors that the Ig-based system found in jawed vertebrates can.[4] Instead of recombination-activating genes (RAGs), genes coding for VLRs can be altered by a family of cytidine deaminases known as APOBEC, possibly through gene conversion.[5] Cytidine deaminase 1 is associated with the assembly of VLRA and VLRC and cytidine deaminase 2 appears to assemble VLRB.[1][3]" This is from wikipedia. I wonder, how did VLRs evolve and how did cystidine deaminases evolve to affect the VLR genes in the right way? [link] [comments]  |
| How is addiction and dependence differentiated? Posted: 16 Aug 2021 08:48 PM PDT Can two people take part in substance use, both using the same drug, same amount and same schedule of use suffer from different psychological associations with that substance ? Can one be classed as addicted and the other only be classed as having a dependence ? Could someone else use the same substance than these other two and use it more regularly and not have an addiction to the substance or even a dependence ? How are addiction and or dependence determined? [link] [comments]  |
| Posted: 16 Aug 2021 10:36 AM PDT The general rule of training for hypertrophy - as opposed to training for strength - is something like 70% your maximum, 10 repetitions per set. Those are generalized numbers, I'm not being accurate and this is broscience, but the core advice given is "less intensity and more repetitions will increase the size of your muscles instead of the strength." Alot of sites explain how but not why the muscles respond that way. Why at that amount and duration? [link] [comments]  |
| If we don't burn fossil fuels is the accumulated carbon lost forever? Posted: 17 Aug 2021 03:26 AM PDT Without humans extracting oil, would Earth run out of carbon as more and more fossil fuels are naturally made from dead organisms over millions of years? [link] [comments]  |
| Are people with aphantasia less prone to hallucinations? Posted: 16 Aug 2021 07:33 PM PDT |
| Are there any creatures with a single type of cone in their eye? Posted: 17 Aug 2021 02:20 AM PDT So we humans have 3 color receptors, a dog had 2, and insects like bees have 4. Is there anything with only 1 color receptor? [link] [comments]  |
| Posted: 17 Aug 2021 06:31 AM PDT |
| What is the descend speed of submarines ? Posted: 17 Aug 2021 02:52 AM PDT Submarines are coming to World of Warships and I am trying to figure out how realistically it was implemented. It seems the submarines in wows currently dive very fast... not sure if that is realistic, right now about 1 to 2 meters per second... seems a bit way too fast ? Does the propeller at the back actually help the diving process ? [link] [comments]  |
| How are electrons replenished when an element gives off electrons? Posted: 16 Aug 2021 04:57 PM PDT My understanding is that, as an example, the piezoelectric effect causes a crystal to shed electrons in the form of electricity if pressure is applied. If a crystal was to move electrons where do they move to, can the element or compound be stable for an infinite time? I know chemical bonding will directly move electrons between or among atoms. Silicone and gallium arsenide will shed electrons when struck by photons (I think). Does the photon replace the elections lost? [link] [comments]  |
| Posted: 16 Aug 2021 01:22 PM PDT I suppose this may count as a history question so maybe this isn't the right place. But I am confused as to how mosquitoes, including the "common malaria mosquito", can still exist in the South but somehow the disease transmitted through the mosquitoes was eradicated. During the period of eradication did they just have a time where they had somehow just killed all the mosquitoes and so all the ones that could've had malaria were dead but then non malaria carrying ones of the same species just came back? The stuff I've looked up explaining the process just kind of go "we used DDT, draining stagnant water, and nets to get rid of malaria) but I don't see how that gets rid of malaria and not mosquitoes (which it obviously didn't). [link] [comments]  |
| Posted: 16 Aug 2021 01:24 PM PDT |
| How did the Island of Sulawesi in Indonesia form? Posted: 17 Aug 2021 12:21 AM PDT |
| How do they measure the trajectory/map the movement of subatomic particles, like in the LHC? Posted: 16 Aug 2021 11:33 AM PDT I have soo many questions about the measuring equipment. I know someone who works with a Mass Spectrometer and LCMS. They seem to have lots of fine-tuning issues on picking up the proper measurements because (I think) is so much larger than what you are actually trying to measure. If that is the case with molecule-sized matter.. what the heck sort of instruments do you need to project the movement of subatomic particles in a 3D space? [link] [comments]  |
| What do the studies indicate about covid-19 vaccines effects on fetus and babies? Posted: 17 Aug 2021 02:17 AM PDT The official position in my country (not US) is that the covid-19 vaccine is "not contraindicated" during pregnancy. I'd like to understand what are the possible side effects of these vaccines on fetus and on babies once they're born. English is not my first language, I apologize for any mistakes. [link] [comments]  |
| A black hole can have greater gravity than objects bigger than it? Posted: 17 Aug 2021 01:40 AM PDT Is it true that black holes can have a greater gravity than objects bigger than them and if so, how is this possible? I've been taught the greater the mass, the greater the force of gravity? Also, I read that if a black hole the size of a penny is in your pocket, then it would devour the whole earth, which again relates to the question. Answers would be greatly appreciated. [link] [comments]  |
| What are symptoms of Silver poisoning besides argyria? Posted: 16 Aug 2021 05:53 PM PDT Besides turning the skin blue or bluish gray what other symptoms are there to silver Poisoning? I found an article that mentioned liver damage, lung and eye irritation and changed in blood cells but what about the silver in the body caused these symptoms and what are the changes in the blood cells ? The main thing mentioned about silver Poisoning is always the argyria. [link] [comments]  |
| Posted: 16 Aug 2021 02:19 PM PDT I grow carnivorous plants, and sundews seem to come from all over the planet despite remoteness. Ones from South Africa are almost identical to the ones I have from Florida. [link] [comments]  |
| Posted: 16 Aug 2021 03:36 PM PDT So with Covid-19, the vaccines are made with the original strain, so are antibodies work against the original strain. But when a vaccinated person gets infected with the Delta variant, in addition to making the OG antibodies, will the immune system also make antibodies specific to the Delta variant? Or will it just produce the OG antibodies? And to a further extent, if we made a vaccine against the Delta variant specifically, would it help at all with already vaccinated people or will it just reinforce the main strain antibodies? [link] [comments]  |
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