- In light of the recent growth of sightings of Tasmanian Tigers and possibility of a species coming back from what we thought was extinction... Has this happened with any other species in the last ~500 years?
- What happened to my body to make it so that I peed the bed less frequently as I got older?
- How do the current levels of non-ionizing radiation, from wireless transmissions in city centres, compare with the exposure we normally get from either background radiation or sunlight etc?
- CPUs carry out anywhere from 1 to 32 instructions per clock cycle; if so few instructions per clock cycle are being performed, what is the benefit to cramming billions of transistors onto one chip?
- Can elements with low atomic number (say less than 83) emit alpha particles?
- If E. Coli is found in our intestines and used in various medicine, why is it harmful in food?
- What exactly is light?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- How long does it take for a particle to reach the speed of light? and how much energy is required?
- Is is possible to precipitate elemental magnesium from solution, similar to tin?
- What causes color degradation?
- Why is Pi in the probability distribution function of the normal distribution ?
- Is there any evidence that long-term sleep deprivation can decrease eyesight or visual acuity?
- Does the insulin/insulin-like signaling pathway have different roles in different organisms or groups of life?
- In places where plant life dies in the winter, is there noticeably more O2 in the summer?
- What's the difference between malignant narcissism and psychopathy?
- How small can an OLED pixel be?
- Which would be easier to build: A particle accelerator or a fusion reactor?
- Is all matter able to take liquid form?
- Does dark matter cluster together like normal matter? Can it form planet or star-like structures or is more like a gas?
- How weak are weak-nuclear-forces and how strong are strong-nuclear-forces?
- Why are hexagons so prevalent in nature?
- Why isn't fiberglass as dangerous as asbestos seeing as they are both fairly similar fibers?
- How quickly do stars change relative position within a galaxy?
| Posted: 04 Apr 2017 07:27 AM PDT Question in title. Just curious if other species have rebounded that we are aware of. Thank you in advance. Edit: Really interesting answers by everyone so far. Thank you! Edit 2: Follow up question. What are the biological implications when a species that we thought was extinct, rebounds it's population? Is it just limited to things like focusing on changing what caused their extinction in the first place, like eradicating the rats in the "tree lobster" article? Edit 3: Holy cow ladies and gents. I never thought I would get this much feedback on my post. It's going to take me a bit to read through it. But I will. In the mean time, thank you again, from the bottom of my heart, for all your answers and feedback. Edit 4: Here are a couple links that led me to believe that the sightings had increased and were credible enough to be taken seriously by scientists. (copy/pasted from a buried comment) Here is a different news source which I read a couple days ago that prompted me to think that the number of sightings have increased recently. In the article they mention several recent sightings and the fact that there is a team of scientists taking action to further investigate the claims. More information on the scientists conducting the research can be found here in a media release from James Cook University. Dr. Sandra Abell and professor Bill Laurence will be leading a team of scientists that will be placing 50 wildlife cameras out in strategic locations to try to catch a glimpse of the creature. This is part of an already existing study that they were conducting to monitor wildlife that had been modified to focus on the Tasmanian Tigers following the credible sighting reports. [link] [comments]  |
| What happened to my body to make it so that I peed the bed less frequently as I got older? Posted: 04 Apr 2017 11:00 PM PDT |
| Posted: 05 Apr 2017 04:51 AM PDT I am in the middle of a debate on the effect of RF radiation on humans. While trying to rebut some counter arguments, I came across this pdf from these guys. Trying not to cringe at the sensationalism and the fear-mongering, i came across this paragraph:
Is this claim true? How do "natural" sources of radiation compare to our artificial ones, in intensity and danger to our health? [link] [comments]  |
| Posted: 05 Apr 2017 04:06 AM PDT How would so few instructions involve so many transistors? [link] [comments]  |
| Can elements with low atomic number (say less than 83) emit alpha particles? Posted: 05 Apr 2017 03:14 AM PDT Or alpha decay just occurs at elements with high atomic number? [link] [comments]  |
| If E. Coli is found in our intestines and used in various medicine, why is it harmful in food? Posted: 04 Apr 2017 07:42 PM PDT E. Coli has come up various times in my biology class, such as being used to create insulin treatments, and also mentioned as being found in the human intestine. So my question is why, such as the Chipotle scandal, is it considered harmful when found in food? [link] [comments]  |
| Posted: 04 Apr 2017 05:48 PM PDT I was discussing an earlier question with a teacher (Can light bend if passed through a small opening?) and he raised an interesting point: What is light? Is it photons moving in a wave pattern? If yes, how does that happen? Or is it a wave through which photons pass? If yes, what exactly does that wave consist of? (I have realised that both of my questions sound similar, but I'm going to keep them both for now.) [link] [comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 05 Apr 2017 08:06 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| How long does it take for a particle to reach the speed of light? and how much energy is required? Posted: 05 Apr 2017 02:01 AM PDT |
| Is is possible to precipitate elemental magnesium from solution, similar to tin? Posted: 04 Apr 2017 09:52 PM PDT https://youtu.be/r-YbQN_twpw?t=147 I have been looking at the ideas behind electrolysis and came across the stannous chloride precipitation, is it possible to make a saturated magnesium chloride solution (Mg (excess)+HCl) and then precipitate elemental magnesium from it using electrolysis? also, would one need to use platinum/graphite electrodes? Or would copper be fine? keep in mind this is just theory, i am aware of the chlorine gas emission from this reaction. Mg+HCl --> MgCl2 + H2 MgCl2 --> Mg2+ +2Cl- Mg2+ +2Cl- --> Mg(s) + Cl2(g) ? [link] [comments]  |
| What causes color degradation? Posted: 04 Apr 2017 07:42 AM PDT I was just wondering exactly how does natural light (sun) degrade (bleaching/white washing) images like posters or paint on a building? Is it the sun reacting to certain things here on the earth? Edit : Fixed spelling error [link] [comments]  |
| Why is Pi in the probability distribution function of the normal distribution ? Posted: 04 Apr 2017 03:16 PM PDT Wikipedia says the the factor 1/sqrt(2pi) in this expression ensures that the total area under the curve is equal to one. Can someone explain to me why that is? [link] [comments]  |
| Is there any evidence that long-term sleep deprivation can decrease eyesight or visual acuity? Posted: 04 Apr 2017 07:04 PM PDT |
| Posted: 04 Apr 2017 08:08 AM PDT Or does it seem to universally perform the same ultimate functions for all life? Insulin-like signaling seems to be a very ancient, conserved, and ubiquitous pathway. I'm wondering what, if any, differences in its function may have arisen in response to the varied environmental pressures that different groups of life were subject to. Any references would be great. [link] [comments]  |
| In places where plant life dies in the winter, is there noticeably more O2 in the summer? Posted: 04 Apr 2017 05:27 AM PDT |
| What's the difference between malignant narcissism and psychopathy? Posted: 04 Apr 2017 04:18 AM PDT This passage appears in the book Snakes in Suits by Paul Babiak and Robert Hare:
[link] [comments]  |
| How small can an OLED pixel be? Posted: 05 Apr 2017 02:46 AM PDT I saw this video recently and started wondering just how small a pixel/pixel pitch could be made. Current OLED display structures are on the micron scale. If the tools used to make OLED displays are similar to semiconductor chip fabrication where photolithography is used to create structures on the nanometer scale, could this ever happen for OLEDs? What are the issues that come along with shrinking component sizes and do the materials used have limits of how small they can be created before they lose function? [link] [comments]  |
| Which would be easier to build: A particle accelerator or a fusion reactor? Posted: 04 Apr 2017 12:53 PM PDT |
| Is all matter able to take liquid form? Posted: 04 Apr 2017 01:48 PM PDT Generally speaking. Specifically; if you heat up a piece of paper it becomes ash (which is mostly carbon, right?)... What happens if you continue to heat that carbon? Can you heat carbon to the point of becoming liquid? [link] [comments]  |
| Posted: 04 Apr 2017 03:15 PM PDT |
| How weak are weak-nuclear-forces and how strong are strong-nuclear-forces? Posted: 04 Apr 2017 08:40 AM PDT I know we can't compare classic to quantum model, but in layman terms can you show comparison in Newton(N)? [link] [comments]  |
| Why are hexagons so prevalent in nature? Posted: 04 Apr 2017 02:46 PM PDT This has always puzzled me. Here are a few examples of hexagons. [link] [comments]  |
| Why isn't fiberglass as dangerous as asbestos seeing as they are both fairly similar fibers? Posted: 04 Apr 2017 09:42 AM PDT |
| How quickly do stars change relative position within a galaxy? Posted: 04 Apr 2017 03:08 PM PDT Assume that an interstellar society exists, that they possess FTL travel, and that they mark stellar positions using a coordinate system that resembles the following:
How much time would need to pass, on average, before there would be a good chance that your coordinates would dump you out of FTL deep in the black? [link] [comments]  |
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