What are the simplest animals that sleep? Amoebas? Hydras? Water Bears? Zooplankton? Or what? |
- What are the simplest animals that sleep? Amoebas? Hydras? Water Bears? Zooplankton? Or what?
- Do unvaccinated people pose a danger to vaccinated people? Why or why not?
- How different was plant life during the time of the dinosaurs vs now?
- Aren’t all animals part of the carbon cycle?
- Can specific freckles/moles and their locations on the body be hereditary?
- Why doesn't cholesterol build up in places other than the heart and brain?
- When we wake up for a minute in the middle of the night, do we end our sleep cycle and start a new one?
- How conductive is plasma, relative to something like copper or salt water?
- How accurate are modern IQ tests in measuring intelligence? What type of stuff do they measure, is it more right-brain or left-brain? And can someone with a high IQ be bad at certain basic things, e.g. spelling, remembering where he/she put his keys? What’s the best way to measure intelligence?
- Do cephalopods, e.g. squids, octopuses, have a dominant tentacle/arm similar to humans having dominant hands/feet?
- How do we get bacteria in our intestines?
- Are ants and bees susceptible to diabetes? Why or why not?
- Do organisms living in complete darkness (caves, deep water, underground) have a circadian rhythm? Most organisms do, but does it ever appear in those that have no access to a 24 hr cycle?
- When is an island an island, and when is it big enough to be "land"?
- My toddler likes to play with my glasses, and it got me thinking. How do doctors determine babies need glasses?
- Is atmospheric pressure due to molecular collisions or gravity?
- If graphene is a single layer of carbon atoms, how would it conduct electricity?
- What sound does a kangaroo make? Any at all?
- How is the frequency response of a microphone determined?
- What makes and erupting volcano like the 1883 eruption of Anak-Krakatau loud enough to be heard at great distances?
- Is there a way to create 3D models of small objects, a few cm across, that would be accurate down below a millimeter in resolution?
- How does Riemann integration work with hyperreals?
| What are the simplest animals that sleep? Amoebas? Hydras? Water Bears? Zooplankton? Or what? Posted: 14 Dec 2018 10:18 PM PST |
| Do unvaccinated people pose a danger to vaccinated people? Why or why not? Posted: 14 Dec 2018 07:32 PM PST Disclaimer: I am vaccinated, and all for vaccinations, I underatand the importance of them fully. I overheard a coworker the other day say he didn't agree with forcing people to be vaccinated because the only pose a risk to themselves by not being vaccinated. I just want a way to rebutle his claim in a rationale way, or just to understand better myself. Thanks! [link] [comments]  |
| How different was plant life during the time of the dinosaurs vs now? Posted: 14 Dec 2018 09:10 PM PST I would think there were more trees and CO2 consuming plant life than there is now, but are there any records or evidence that details how much more abundant it was? [link] [comments]  |
| Aren’t all animals part of the carbon cycle? Posted: 15 Dec 2018 05:17 AM PST How does farming of cows and other animals affect global warming? I understand that they produce methane which is more harmful than CO2 but isn't all the carbon just recycled in the end? Say if the number of animals in the world was held constant wouldn't we reach an equilibrium of CO2 in the atmosphere? [link] [comments]  |
| Can specific freckles/moles and their locations on the body be hereditary? Posted: 14 Dec 2018 09:15 PM PST I know that having freckles vs not having freckles is genetic, but what about single specific freckles? My mother and I have a freckle on the exact same spot of our bodies. Not a tiny freckle, but a dark and distinct one that makes it seem like more than a fluke. Same goes with my father's side. My grandfather has a small mole on his face and my father has one that's the same size in the exact same spot. I also have this mole except maybe an inch down from where theirs are. [link] [comments]  |
| Why doesn't cholesterol build up in places other than the heart and brain? Posted: 15 Dec 2018 07:19 AM PST I never hear about someone losing an arm, leg, liver or kidney due to buildup. It's always in the heart or brain...why is that? [link] [comments]  |
| Posted: 14 Dec 2018 04:18 PM PST So let's say you wake up in the 3rd stage even if only for a minute and you sleep in again, do you continue with the 3rd/4th stage or do you start all over again? [link] [comments]  |
| How conductive is plasma, relative to something like copper or salt water? Posted: 15 Dec 2018 12:06 AM PST I remember listening to a sciencey song with the line '[in plasma] electrons are free' and I'm wondering if that means it is very conductive like other substances with delocalised electrons. [link] [comments]  |
| Posted: 15 Dec 2018 02:41 AM PST |
| Posted: 15 Dec 2018 06:49 AM PST And if yes, is the dominance wired to the left/right side of its body as it is in humans, or can one out of x tentacles be the dominant one, with no respect which half of the body it is on? [link] [comments]  |
| How do we get bacteria in our intestines? Posted: 15 Dec 2018 06:43 AM PST Main question how the bacteria survive the acidic environment of the stomach and get to the intestine? I know we have bacteria in our stomach too, most of them are aerobic and an environment in the intestine is anaerobic. Can they change the way they work at will? [link] [comments]  |
| Are ants and bees susceptible to diabetes? Why or why not? Posted: 15 Dec 2018 06:26 AM PST |
| Posted: 15 Dec 2018 05:55 AM PST |
| When is an island an island, and when is it big enough to be "land"? Posted: 14 Dec 2018 02:34 PM PST Sorry but this stupid question is in my mind since this morning. [link] [comments]  |
| Posted: 14 Dec 2018 05:31 PM PST I'm assuming there is some sort of test, but babies can't tell you if 1 or 2 looks better. So how do they find visual impairment in infants? Is there a drastic difference in a visual test? What about babies who see things just a little blurry, do they slip through the cracks? [link] [comments]  |
| Is atmospheric pressure due to molecular collisions or gravity? Posted: 14 Dec 2018 05:29 PM PST On one hand, we are told that pressure in a gas comes from the molecules bouncing against everything and itself and exerting a force against the surfaces they collide with. On the other hand, we hear that the pressure of the atmosphere comes from the fact that there is so much atmosphere being weighed down above us. Where is the connection or bridge between these two? [link] [comments]  |
| If graphene is a single layer of carbon atoms, how would it conduct electricity? Posted: 14 Dec 2018 09:37 PM PST Essentially asking the mechanics of how graphene conducts electricity. Is it possible to make a super durable/malleable wire/"tape" that can conduct electricity for a cheap price?Any research papers I can dive into too? [link] [comments]  |
| What sound does a kangaroo make? Any at all? Posted: 14 Dec 2018 07:26 PM PST |
| How is the frequency response of a microphone determined? Posted: 14 Dec 2018 05:17 PM PST How do engineers and manufacturers verify that the microphones they produce have a flat frequency response? Wouldn't such verification require a sound transducer that displaces a known volume of air to work over a similar frequency range, or multiple transducers of overlapping frequency bands? Do such standards exist? If so, how are they calibrated? [link] [comments]  |
| Posted: 14 Dec 2018 08:57 PM PST |
| Posted: 14 Dec 2018 02:29 PM PST I know this is not a direct "science question", but a technical question for scientists/engineers. It is non-hypothetical, closed-ended, with a definite answer, and targeted at the science community at large, so I hope it will not run afoul of sub rules. Anyway, I am aware of LiDAR used to scan large areas (rooms, buildings, etc), but am not aware of a way to capture a high resolution virtual model of something like a chess piece or acorn that wouldn't cost a million dollars. Is this within our technical capabilities at this time, outside of massive machines like MRIs? [link] [comments]  |
| How does Riemann integration work with hyperreals? Posted: 14 Dec 2018 09:20 PM PST All the discussions of integration with the hyperreals I've seen prove that the Riemann sum is finite, but not that its standard part is something other than 0. My confusion stems from the fact that the product of any finite number and an infinitesimal is itself an infinitesimal, as is the sum of two infinitesimals. So if we say the Riemann sum Σf(x)dx really is adding a series of numbers that have been multiplied by the infinitesimal dx, it sounds like we would get an infinitesimal result. What am I missing? [link] [comments]  |
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