How do dolphins sleep. If dolphins need air to breathe then how do they sleep underwater? |
- How do dolphins sleep. If dolphins need air to breathe then how do they sleep underwater?
- How were ancient rope suspension bridges built across large gaps in terrain?
- How would someone who is infected with COVID-19 but is asymptomatic spread the disease to others, if it is spread by respiratory droplets from coughing and sneezing?
- What would remain of a human body after nine thousand years?
- Why does COVID-19 look like a spiked-ball?
- What impact with the COVID-19 quarantines/lock downs have on influenza?
- Is it possible to create a "lense" to focus x-rays?
- How much of the observed growth rate in new COVID-19 cases is due to increased testing?
- Are half-lives exact or are they an average?
- If the tectonic plates are constantly shifting, albeit slightly, why don't we experience earthquakes more frequently?
- What asteroids consist of? Is there a good table of elements with percentage for different types of asteroids?
- Why can we breathe manually but we can’t manually make our beat heart?
- Does your blood group play role in disease resistance?
- Why is the Madden-Julian oscillation so difficult to prognosticate? How would meteorological models be impacted by a deeper understanding of what affects its movement/position?
| How do dolphins sleep. If dolphins need air to breathe then how do they sleep underwater? Posted: 22 Mar 2020 03:08 AM PDT |
| How were ancient rope suspension bridges built across large gaps in terrain? Posted: 21 Mar 2020 09:23 PM PDT Specifically how were they built above large drops? Would they need an extra long rope so they could climb down and then up to secure it from the other side? [link] [comments]  |
| Posted: 21 Mar 2020 05:09 PM PDT |
| What would remain of a human body after nine thousand years? Posted: 21 Mar 2020 07:37 PM PDT If, say, someone died in the middle of a tundra nine thousand years ago, what would their remains look like today? I assume they'd be completely buried, much like ancient cities are today. What if they died in a cave at the snowy peak of a mountain? What if the entrance to the cave collapsed and their body got sealed off from the outside world? How preserved would they be? Would they go through mummification? Would a person's skeleton survive that long? I've, so far, asked three subreddits (two of which were incredibly helpful) and I figured this'd be the best place to ask. Thanks in advance! PS: I used the Archaeology flair because I felt that'd be the most fitting, mummies n' all. The next ones I'd pick'd be Anthropology (because of Forensic Anthro.), Biology and Human Body. [link] [comments]  |
| Why does COVID-19 look like a spiked-ball? Posted: 22 Mar 2020 04:10 AM PDT Why does COVID-19 look like a spiked ball? Is there some sort of advantage of that shape or just so? [link] [comments]  |
| What impact with the COVID-19 quarantines/lock downs have on influenza? Posted: 21 Mar 2020 09:50 AM PDT The incubation period for influenza is ~1-4 days. the incubation period for covid-19 is ~1-14 days. We also have a vaccine for influenza (though I realize that influenza is broad term). What is the expected impact of these behavioral changes on influenza? [link] [comments]  |
| Is it possible to create a "lense" to focus x-rays? Posted: 21 Mar 2020 02:53 PM PDT |
| How much of the observed growth rate in new COVID-19 cases is due to increased testing? Posted: 21 Mar 2020 09:59 AM PDT What is the impact of testing on the measured growth rate? consider the limiting case where we have very few tests, we will measure very few confirmed cases (and an incorrect measurement of the epidemic - or rather, a measurement with a larfe error). The concern is that the increase in the number of confirmed cases may be more impacted by the number of available tests rather than a true measure of the growth rate of the epidemic. Is it as simple as putting larger error bars on the data when we have fewer tests and a smaller sample size and calculating the range of possible growth rates as a result? [link] [comments]  |
| Are half-lives exact or are they an average? Posted: 21 Mar 2020 05:44 PM PDT Supposing that the half-life of an isotope is 300.0 seconds, will exactly half of a sample of that isotope decay in exactly 300.0 seconds every single time, or is there some variability to it and 300.0 seconds is simply the average? And if there is some variability to it, would the variability increase through subsequent half-lives? Furthermore, how do we measure half-lives? [link] [comments]  |
| Posted: 21 Mar 2020 06:07 PM PDT |
| Posted: 21 Mar 2020 01:09 PM PDT I read a lot about asteroid classification on wiki, found some info about mining potential but can't find a good table that shows which elements can potentially be found in different types. Is there a good consolidated source for this? [link] [comments]  |
| Why can we breathe manually but we can’t manually make our beat heart? Posted: 21 Mar 2020 05:06 PM PDT |
| Does your blood group play role in disease resistance? Posted: 20 Mar 2020 08:46 PM PDT I'm seeing articles quoting a study that says A blood groups are more vulnerable to COVID-19. How is this possible? And are there other diseases that your blood group can be more susceptible to? [link] [comments]  |
| Posted: 21 Mar 2020 09:43 AM PDT |
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