Is there a scientific reason they ask you not to use flash on your camera when taking photos centuries old interiors or artifacts? |
- Is there a scientific reason they ask you not to use flash on your camera when taking photos centuries old interiors or artifacts?
- Why is the Earth not tidally locked with the Sun?
- Does your body become less "skilled" with rarely used autonomous functions in the same way as conscious skills?
- How do neutron star mergers populate the universe with heavier elements?
- How can we create agonists that only bind to one receptor subtype?
- What are the differences between serotonin agonists/antagonist, short term vs long term?
- What is the most complex endosymbiosis event (e.g., dinoflagellates)?
- Is the biosynthesis of carbon allotropes possible?
- Is the ability to do tongue rolling tricks like clover or twisting tongue genetic?
- If it is believed that Mars lost its atmosphere because it lost its magnetic field & lost its protection against solar winds/storms, why does Venus have such a thick atmosphere since it too has no intrinsic magnetic field to protect from the sun & is closer to any solar storm?
- How do asteroid belts influence planets? Will it influence tides, like the moon?
- What is the difference between an aqueous solution and a hydrate?
- How is carbonation measured?
- What detrimental effects does smoking weed have on a fetus? Is it more detrimental in the earlier terms?
- Why do Rapid Antigen Test kits center around 2 quite distinct price range? Are there different technologies to do so? Is it simply based on the country of manufacturing?
- why is bone growth (epiphyseal plate) not possible after plates close ?
- Is it possible for intestines to "narrow" in the course of life?
- Are there any non-steroid testosterone precursors?
- How is dish soap, liquid soap, body wash, shampoo, face wash, and cleansers different?
- Why does exposure to radiation result in cell mutation?
| Posted: 15 Mar 2022 05:09 AM PDT |
| Why is the Earth not tidally locked with the Sun? Posted: 14 Mar 2022 05:37 PM PDT The moon is tidally locked and always has one side facing Earth, so why doesn't the earth do the same with the Sun? Given enough time, will it? [link] [comments] |
| Posted: 15 Mar 2022 08:12 AM PDT It's pretty clear that if you don't use a physical skill regularly (say golf swings, hand-eye coordination, the perfect goal kick, etc.) it'll degrade over time. Does something similar apply to autonomous functions like, say, throwing up, conscious urination (as opposed to a catheter), ocular response (for people who are blind), etc.? [link] [comments] |
| How do neutron star mergers populate the universe with heavier elements? Posted: 15 Mar 2022 08:38 AM PDT There's something remarkable I learned from PBS Space Time recently - there's an extra step in our cosmic history! Initially the pathway to the modern galaxy was:
The discovery (not sure how recent), is that production of heavier elements from a supernova can't be responsible for the observed abundance of above-iron elements. Something about the rapid neutron capture process (r-process) not occurring at a high enough rate to fuse these heavier elements. The candidate now for r-process are neutron star mergers. Now my question: how can this be possible if neutron star mergers always or almost always create black holes as dictated by their solar masses? The typical solar mass range for a neutron star is 1.4 to 3.2, and the typical lower limit solar mass range for black holes is 1.5 to 3.0. I am thinking that the merger of any neutron stars would create a black hole, and therefore it doesn't matter how fruitful your r-process is, all those heavier elements are now sequestered in a black hole. Can someone help explain how this matter could be ejected from such mergers? Thank you! [link] [comments] |
| How can we create agonists that only bind to one receptor subtype? Posted: 15 Mar 2022 07:45 AM PDT For example, we can synthesize molecules that only bind to one adrenergic receptor subtype. Since it has to be similar in shape to epi/norepi, how does this specificity occur? Do these specific agonists stimulate the other adrenergic receptors to some degree? [link] [comments] |
| What are the differences between serotonin agonists/antagonist, short term vs long term? Posted: 15 Mar 2022 06:35 AM PDT Am I correct in thinking serotonin agonists raise serotonin? And that antagonists reduce it? But in terms of sensitivity to serotonin, agonists decrease and antagonist increase? What are the key differences between the two and how do they affect someone short term vs long term. I'm very curious on the subject. I took tryptophan which is a precursor to serotonin and didn't feel too great. Started getting brain zaps. I then a few days later took tyrosine to boost dopamine and reduce serotonin and this gave me a huge migrain. Both times had high levels of anxiety, and anxiety is something I've dealt with for a while. I've never taken medicine but have done psychadelics in the past. I stopped when I realised I was getting brain zaps a couple of days after a psychedelic trip. It's got me very curious about my own brain chemistry and why I'm getting these effects. It's a complex issue but hoping someone could share the light on something? [link] [comments] |
| What is the most complex endosymbiosis event (e.g., dinoflagellates)? Posted: 15 Mar 2022 08:22 AM PDT Green Algae = Primary endosymbiosis Diatoms = Secondary endosymbiosis Dinoflagellates = Tertiary endosymbiosis Is there any higher level endosymbiosis event than dinoflagellates? If so, what is it? If not, what's the most complex instance of endosymbiosis? [link] [comments] |
| Is the biosynthesis of carbon allotropes possible? Posted: 15 Mar 2022 08:06 AM PDT |
| Is the ability to do tongue rolling tricks like clover or twisting tongue genetic? Posted: 15 Mar 2022 07:40 AM PDT |
| Posted: 14 Mar 2022 08:47 PM PDT I mean, Venus had such a think atmosphere, thicker than Earths & is so hot around the entire thing, yet is a similar size. It just baffles me that Mars potentially lost its atmosphere because no magnetic field, yet Venus never did. Finally, does Earth actually need a magnetic field to keep its atmosphere protected from solar winds? Or are there just different mechanisms to protect an atmosphere & Earth's happens to be a magnetic field? [link] [comments] |
| How do asteroid belts influence planets? Will it influence tides, like the moon? Posted: 14 Mar 2022 12:35 PM PDT |
| What is the difference between an aqueous solution and a hydrate? Posted: 14 Mar 2022 09:11 PM PDT |
| Posted: 14 Mar 2022 04:42 PM PDT There's a marked difference between freshly poured/opened soda and 'flat' soda, as well as between water and perrier. How is carbonation measured? Is it different for open vs closed containers? What is the science, and the tools, involved? (Or if someone can simply point me in the right direction.) [link] [comments] |
| Posted: 14 Mar 2022 11:42 PM PDT |
| Posted: 14 Mar 2022 07:28 PM PDT There are lots of RAT kits out there recently. Where I live (Hong Kong), the government has a daily change of mind whether we'll be mandatorily tested (3 times in a roll) and how it is going to be arranged. Anyhow, it gets more people nervous and many buy these kits as contingency. After an initial lack of supplies, it is quite abundant today. Here is a sample list: https://www.covidrat.info/rat/item-search (credit to a redditor who wrote the website, pulling data from various location). What I notice is that these kits sort of center around 2 price levels: around USD2.5-5, and around 10-15. Those that are made in China are cheaper. Those that were from Germany are more expensive. But other than that, I can't find significant differences in terms of accuracy etc. Is that the only difference? Are there different technologies (to create the kit) that create the huge price gap? Edit: Reddit post by the creator of the webpage: https://www.reddit.com/r/HongKong/comments/tbl2b9/i_made_a_better_covid_rapid_test_kit_search_tool/ [link] [comments] |
| why is bone growth (epiphyseal plate) not possible after plates close ? Posted: 14 Mar 2022 10:23 PM PDT Why is bone growth impossible, for example if growth plates have closed. Knowing how growth plates work, why would applying enough pressure through whatever means you'd like (let's use a weight for example) allowing to create space within the bone (growth plate) allowing for more bone to grow. Obviously, you have to apply an exceptional amount of pressure to the epiphyseal to allow the bones to separate, causing growth. Disclaimer: i'm aware of the basic reasoning behind it, but feel like there is more of a reasoning behind it [link] [comments] |
| Is it possible for intestines to "narrow" in the course of life? Posted: 14 Mar 2022 07:39 PM PDT Im curious if there are mchanisms that would cause the narrowing of intestines. I dont mean the length. I suppose maybe the correct word is the circumfrence....the interior space inside the tubing of the instestines. A campbells soup can thinning to a small pill bottle? Is it possible for only a portion of the instestines to do this? If this is possible...what might be such a cause? [link] [comments] |
| Are there any non-steroid testosterone precursors? Posted: 14 Mar 2022 10:48 AM PDT Are there any precursors to testosterone that do NOT have the side effects of anabolic steroids and are NOT considered steroids? Is there something before testosterone in the transduction pathway that if someone were to take they would boost their T levels? [link] [comments] |
| How is dish soap, liquid soap, body wash, shampoo, face wash, and cleansers different? Posted: 13 Mar 2022 09:15 PM PDT My other question is my understanding is that the cleaning agent in soap is lye (sodium hydroxide) which sticks oils in your hands. there are liquid soap out there with it this ingredient and some proclaim to be "soap free" so how do they clean? [link] [comments] |
| Why does exposure to radiation result in cell mutation? Posted: 13 Mar 2022 10:07 PM PDT |
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