Are there any known examples of domesticated mammals becoming extinct? |
- Are there any known examples of domesticated mammals becoming extinct?
- Could a single celestial body be as large as the Milky Way galaxy? If not, what is restricting the size of it?
- How do ovums prevent excess sperm cells from entering them when they've already fused with one?
- How are mineral deficiencies even possible in adults? Minerals don't degrade or "break down" in enzymatic reactions (unlike many molecules), so can't the body completely stop excreting them if intake is low?
- How old is Earth's oldest ice? What was going on when it froze?
- How did the tribal people of the Sentinel Island reached there in first place ?
- Was the development team of the first atomic bomb surprised by the size of the explosion or had they calculated how much energy would be released before the first explosion?
- Why is it that certain mammals carry a risk for rabies, but rodents do not?
- Is there a material which giving energy (heat) makes it colder?
- How do those flavor changing berries work?
- What happens when I jump inside a space centrifuge?
- What attracts flies to feces?
- Are tectonic plates moving faster in areas with frequent earthquakes?
- Why aren't rotational kinetic energy and translational kinetic energy as fundamentally distinct from one another as angular momentum and linear momentum?
- Did the dinosaur-apocalypse meteor's impact change the Earth's orbit or rotation?
- What are the numerous smaller pipes and gauges seen on rocket engines?
- How do electrons or positrons come into existence during beta decay?
- Do stars make noises? Would we be able to hear the noises or sounds they emit?
- What kind of animals inhabited north america before the native americans?
- How do perennials know when it's spring?
- Are there any materials/metals that marine life (corals, barnacles, etc.) cannot grow on? If so, why?
- How is it possible to merge or split photons around a neutron star if photons are elementary particles/waves?
| Are there any known examples of domesticated mammals becoming extinct? Posted: 23 Nov 2018 10:20 AM PST |
| Posted: 24 Nov 2018 06:23 AM PST |
| How do ovums prevent excess sperm cells from entering them when they've already fused with one? Posted: 24 Nov 2018 06:30 AM PST |
| Posted: 24 Nov 2018 06:28 AM PST Mineral deficiencies are possible in mammals when subjected to dietary restriction of said minerals. Why are those deficiencies even possible, though? It is understandable why vitamin deficiencies are possible; Different vitamins (molecules) are used for X and Y, and then break down to useless molecules, requiring daily intake to keep a normal concentration. The same does not apply to minerals. Magnesium, for instance; in the body, Mg2+ ions participate in 300+ enzymatic reactions, making Mg a major electrolyte required in large amounts in the diet. However, Mg2+ can't degrade or break down like molecules can (due to it already being a single atom/ion), so technically speaking, it could be recycled indefinitely in adults (children, but not adults, have rapidly growing bodies so it makes sense they would need it). Yes, there's the fact that some endogenous chemicals require Magnesium to even function, like ATP, which is only active as Mg-ATP. That still doesn't defy my point - when Mg-ATP complex is broken down after it was used for energy production, the Mg2+ ion is released and can be reused for any purpose. [link] [comments]  |
| How old is Earth's oldest ice? What was going on when it froze? Posted: 23 Nov 2018 09:45 PM PST |
| How did the tribal people of the Sentinel Island reached there in first place ? Posted: 23 Nov 2018 10:34 PM PST How the island got inhabited in first place thousand of years ago? The only way to reach there was through ships in past. But if they even don't know how to start fire or do agriculture, then reaching the island by boat for them is not an option. [link] [comments]  |
| Posted: 23 Nov 2018 12:08 PM PST |
| Why is it that certain mammals carry a risk for rabies, but rodents do not? Posted: 23 Nov 2018 08:59 PM PST In the title I mean small indoor rodents, not necessarily larger ones like a groundhog or beaver. I understand that certain animal populations pose a threat for this disease such as bats or raccoons (in the United States), and an experience with either of these would require urgent medical treatment. However, I learned that small rodents (rats and mice) are almost never infected in the wild and have never transmitted the disease to humans in the US. I went to see medical professionals a while ago because I had a small mouse in my living area at the time, it licked my foot but I had a sock on. I removed the sock shortly afterward and I'm pretty sure nothing got on my hands. I was just concerned (I deal with anxiety at times) even if in hindsight it was unnecessary. They told me not to worry and since there was zero risk, there is nothing that needs to be done. Out of curiosity, why are small rodents capable of spreading certain other diseases, but never this one? If a small rodent was attacked by an infected carrier, would it die almost immediately? Appreciate all knowledgeable answers. [link] [comments]  |
| Is there a material which giving energy (heat) makes it colder? Posted: 24 Nov 2018 05:17 AM PST I was reading through a physics class annotations and there was this statement: "Generally, heat absorption results in an increase of temperature". [link] [comments]  |
| How do those flavor changing berries work? Posted: 24 Nov 2018 12:05 AM PST I think many people have heard about those berries that supposedly make sour things sweet and vice versa but how do they actually work? [link] [comments]  |
| What happens when I jump inside a space centrifuge? Posted: 23 Nov 2018 11:56 PM PST Let's say it's a fairly low-acceleration centrifuge, so I'll be able to jump quite 'high'. I preserve angular momentum and velocity, but where do I land? [link] [comments]  |
| Posted: 23 Nov 2018 03:28 PM PST Are there enough sugars, proteins and fats in shit to make a tasty meal for flies, that they can smell from a distance? Or are they being tricked somehow? [link] [comments]  |
| Are tectonic plates moving faster in areas with frequent earthquakes? Posted: 23 Nov 2018 09:39 PM PST When describing tectonic plate movements, scientists say that they move at quite slow speeds, measured in millimetres per year. At the same time, in places where earthquakes occur, a single powerful earthquake can cause ground movement of multiple meters all at once, orders of magnitude faster than millimetres per year. Isn't this contradictory? Shouldn't the tectonic plate movement be actually faster, taking the earthquake movement into account? [link] [comments]  |
| Posted: 23 Nov 2018 12:38 PM PST Conservation of momentum and conservation of angular momentum each have, through Noether's theorem, their own associated fundamental symmetry of the universe: spatial symmetry and rotational symmetry respectively. In (seeming) contrast, all different forms of energy -- translational, rotational, vibrational, nuclear, etc etc -- are lumped together in Noether's theorem, their collective conservation leading to (or being equivalent to) the universe's time symmetry. This makes sense, since you can convert any kind of energy into any other kind, so they are only conserved collectively. But, rotational kinetic energy is directly associated with angular momentum (right?), and translational kinetic energy is directly associated with linear momentum (right?). So why are you able to convert between rotational and translational kinetic energies, but not between angular and linear momentums...momenta...? [link] [comments]  |
| Did the dinosaur-apocalypse meteor's impact change the Earth's orbit or rotation? Posted: 23 Nov 2018 05:45 PM PST |
| What are the numerous smaller pipes and gauges seen on rocket engines? Posted: 23 Nov 2018 08:14 PM PST I know the basics of how the Inert gas, fuel, Oxidizer and the turbines are fueled, but after many hours of looking I cannot find the use of all the other little pipes and gauges seen on the Space Shuttle or F1 engines... If anyone knows the answer of links that can be useful, please help, thanks in Advance! :) [link] [comments]  |
| How do electrons or positrons come into existence during beta decay? Posted: 23 Nov 2018 01:24 PM PST How is it possible for an electron or a positron to just come into existence during beta decay? What happens to the quarks that were previously inside the nucleons? Like in beta positive decay, how is a positron and a neutrino just produced from the nucleus, I don't understand how these particles can just come into existence when the proton that "decays" does not consist of those particles.... [link] [comments]  |
| Do stars make noises? Would we be able to hear the noises or sounds they emit? Posted: 23 Nov 2018 02:56 PM PST |
| What kind of animals inhabited north america before the native americans? Posted: 23 Nov 2018 07:37 PM PST |
| How do perennials know when it's spring? Posted: 23 Nov 2018 02:23 PM PST In my experience, daffodils have always bloomed earlier than I expect due to receiving a couple warm days after a frost. How do perennials know when to bloom in warmer climates? And how exactly do bulbs know? [link] [comments]  |
| Posted: 23 Nov 2018 09:34 PM PST |
| Posted: 23 Nov 2018 12:29 PM PST According to this Wikipedia article , neutron stars' powerful magnetic fields can merge or split photons, but first of all, this makes about as much sense to me as splitting a quark -- you can't split something which is already the smallest possible unit of its kind. Second, how would it be possible to split or merge a photon if it has no mass? [link] [comments]  |
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