Why do Giraffes only live for 25 years but Elephants live upto 70 years even though they both share similar diets, size and live in the same parts of the world? |
- Why do Giraffes only live for 25 years but Elephants live upto 70 years even though they both share similar diets, size and live in the same parts of the world?
- Does pregnancy really last a set amount of time? For humans it's 9 months, but how much leeway is there? Does nutrition, lifestyle and environment not have influence on the duration of pregnancy?
- Can a photon release a portion of its energy?
- Why do young, healthy people have more intense vaccine reactogenicity but get less sick when they catch a virus?
- Does regular use of SSRI’s impact overall serotonin or dopamine production?
- Are they searching for a single particle in the search for black matter or is it believed the answer to the unobservable majority of mass within the known universe has multiple solutions?
- How does the Sinovac Covid-19 vaccine have such wildly different efficacy rates around the world?
- What is actually going on with new COVID-19 variants and their mortality rate?
- Some of the most massive craters on the surface of the moon and elsewhere throughout the solar system seem relatively "shallow" considering how wide the craters are. What gives craters this wide and flat shape?
- Why are ceramics used for things like heat shielding?
- If a woman ovulated off the right ovary and had an early miscarriage, is she more likely to ovulate off the left ovary in the following cycle?
- Could we detect gravitational waves as remnants of the Big Bang?
- What would be observed in the Large Hadron Collider to indicate that a new particle might exist, for example, a supersymmetric particle counterpart?
- How do airplane pilots control lift? Is there a way to vary the lift the wings generate, or do pilots have to slow down up or pitch down when cruising?
- Why are some antibiotics injected, some eaten, and some placed on the skin?
- How can a candle make oxygen?
- What is the current scientific consensus on willpower? Do we really run out of it?
- How do we know the brightness of supernovae?
- How important is Covid vax second shot spacing?
- How did ancient people treat and prevent Anthrax?
- Does plasma have the ability to be positively charged?
- How do we know how well dogs can smell?
| Posted: 25 Feb 2021 10:44 AM PST |
| Posted: 26 Feb 2021 03:25 AM PST |
| Can a photon release a portion of its energy? Posted: 26 Feb 2021 07:46 AM PST So I have a basic understanding of light and it's duality and what not. But I was wondering when a photon hits an object and reflects off, say a mirror, does it impart some of its energy and move off or does a photon only ever release all its energy or else bounces off an object? Apologies if I have phrased this poorly, found it hard to articulate exactly what I was getting at [link] [comments]  |
| Posted: 25 Feb 2021 09:13 AM PST I've read that young, healthy people are more likely to experience side effects from the COVID vaccines because of a robust immune response. So why do young, healthy people experience fewer symptoms/less intense illness when exposed to an actual virus? [link] [comments]  |
| Does regular use of SSRI’s impact overall serotonin or dopamine production? Posted: 25 Feb 2021 07:22 PM PST |
| Posted: 26 Feb 2021 05:53 AM PST Everytime I hear about black matter it sounds like they are talking about a single particle. I don't know the gist of it, but in my head it sounds more probable that the great unobservable mass consists out of a lot of different things we still can't observe. If we can only observe about 10% of the universe and this consists out of millions of things, it kind of would be crazy the other 90% would consist out of a single thing right? I understand black matter could be the stepping stone to finding out more, but I have no clue what the exact theories are on this. So that's why I'm asking here! [link] [comments]  |
| How does the Sinovac Covid-19 vaccine have such wildly different efficacy rates around the world? Posted: 25 Feb 2021 09:46 PM PST One trial in Brazil shows an efficacy rate of %50.4, while Turkey reports %91.25 efficacy rate. Is it possible this was caused by local mutation? What are the factors at play here? Bonus question: In both cases, protection against severe cases are reported to be around %90, not taking into account the South African and UK variants. I'm having trouble understanding the reasons behind how a vaccine that can't stop you from getting infected protect you against the severe form of the disease? Thanks! [link] [comments]  |
| What is actually going on with new COVID-19 variants and their mortality rate? Posted: 26 Feb 2021 04:39 AM PST There seems to be a new variant each week, which are being labelled as 'variants of concern'. I understand that they're usually related to the vaccination efforts and ensuring people will be protected against new variants, long enough for the vaccines to be tweaked when an inevitable, vaccine-resistant strain emerges. I'm not worried about that, because each of these new variants don't seem to fully bypass any of the vaccines yet. What I am worried about is some variants being reported as more lethal, for example the UK and California ones. I understand the news will use sensational headlines to catch people's attention, but shouldn't a virus start mutating to be less dangerous? And if this isn't the case for coronavirus, will there be a peak mortality rate or will it continue to climb? [link] [comments]  |
| Posted: 25 Feb 2021 11:08 AM PST |
| Why are ceramics used for things like heat shielding? Posted: 25 Feb 2021 04:20 PM PST I was thinking about how ceramics are used in shielding and things like tiles on the Space a shuttle and realized that I don't know why they are so good at dissipating heat. [link] [comments]  |
| Posted: 25 Feb 2021 10:26 AM PST Hey all! 👋 I have a question, I tried asking in some pregnancy related subs and got radio silence. Basically: does it take some time for an ovary to recover after a chemical pregnancy? Thus making it more likely you will ovulate off the opposite side in the cycle following the loss? So backstory as to how I started wondering... I'm 27 and started my cycle at 9. Since I was 13, I've been able to feel my ovulation (Mittelschmerz). However it is almost always on my right side! I've also had two pregnancies with early scans that confirmed I had ovulated off the right side to conceive them. In December I had a chemical pregnancy. In January I felt unable to confirm ovulation (I don't temp) because I did not feel that pain. I ended up with a positive test about a month after my chemical started. Now I've had an 8 week scan on that pregnancy and the tech told me I ovulated off my LEFT!!! perhaps that explains why I didn't feel it? Thoughts? [link] [comments]  |
| Could we detect gravitational waves as remnants of the Big Bang? Posted: 25 Feb 2021 04:52 PM PST Assuming gravitational waves exist as wave forms and assuming they move at the speed of light, shouldn't we be able to find the gravitational equivalent of cosmic background radiation from the Big Bang? It seems like there should be a "hum" in the universe, perhaps a red shift in background gravity. It would be like a stretching of the universe detectable in weak, long gravity waves. [link] [comments]  |
| Posted: 25 Feb 2021 06:14 PM PST |
| Posted: 25 Feb 2021 01:36 PM PST |
| Why are some antibiotics injected, some eaten, and some placed on the skin? Posted: 25 Feb 2021 06:41 PM PST I'm aware that some antibiotic creams exist and have used them before. But what differentiates between ingested antibiotics and injected antibiotics, both in their makeup and which situation calls for it? [link] [comments]  |
| Posted: 25 Feb 2021 03:20 PM PST I was watching a show on submarines and they mentioned a chlorate candle that when burned release oxygen in emergency situations. My whole like i've known candles / fire to oxidize or use up oxygen. How can this candle generate oxygen? [link] [comments]  |
| What is the current scientific consensus on willpower? Do we really run out of it? Posted: 25 Feb 2021 10:55 AM PST |
| How do we know the brightness of supernovae? Posted: 25 Feb 2021 04:10 PM PST In determining the expansion rate of the universe, we need to know distances, which are hard to directly measure. in order to figure out distances we use the power output of a light-emitting object called a standard candle and use the inverse square law to figure out the distance. but this requires knowing the power of the candle, and apparently we use supernovae as candles, but i don't know how we know what the power/brightness is. [link] [comments]  |
| How important is Covid vax second shot spacing? Posted: 25 Feb 2021 03:53 PM PST Moderna second shot is supposed to be four weeks after the first, and three weeks for Pfizer. I'm assuming this is arbitrary, just based on what they did during testing, and not because that spacing is critical, but I don't really know. What happens if you get the second shot earlier or later than the recommended spacing? [link] [comments]  |
| How did ancient people treat and prevent Anthrax? Posted: 25 Feb 2021 09:22 AM PST Anthrax is an old and deadly disease with the respiratory form being over 90 percent lethal. It also has great infectious capabilities and was hard to treat without antibiotics. Given this, how did our ancestors fight against anthrax? What did they use to treat it and how did they prevent it? (Before the invention of antibiotics and vaccines) [link] [comments]  |
| Does plasma have the ability to be positively charged? Posted: 25 Feb 2021 03:06 PM PST Can you make plasma positive? If so, how do you achieve this? Or is there no way we can with our current technology? [link] [comments]  |
| How do we know how well dogs can smell? Posted: 25 Feb 2021 06:43 AM PST Just wondering how we scientists can measure that dogs have X times better smell than us [link] [comments]  |
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