Why do some birds hop while some of them walk? |
- Why do some birds hop while some of them walk?
- AskScience AMA Series: I'm an expert on all things springtime and the correspondent on a PBS Nature series about spring, phenology, and citizen science. Ask me anything!
- How do spiders know where to build their webs?
- What makes someone a light sleeper or a heavy sleeper?
- Why does having a bigger particle accelerator help reach higher energy collisions? Can't we just spin around in a smaller one for longer?
- Do violent video games increase aggression in people?
- Is it possible to have 0 resistance?
- Why can the first electron orbital only hold 2 electrons?
- Why doesn't diarrhea kill us when it used to be so fatal?
- Is it possible for their to be "Dark Systems" I.e. Solar systems with no star at the center but rather massive gas giants?
- How much do crumple zones affect a cars stopping time?
- Do new elements form at the center of a nuclear bomb explosion?
- Why can we vaccinate against some diseases (measles, chickenpox, hepatitis B) but cannot vaccinate against others (HIV, gonorrhea, Ebola)?
- What are the atmospheric levels of ethanol from wild sources?
- Is their an actual cause/effect relationship between smoking and lung cancer, or is it just correlation?
- How do relativistic jets escape the singularity of black holes when nothing else can?
- Based on the available statistics and every other thing being equal, is it safer to give birth naturally or by Caesarian sectioning?
- How far do slugs travel?
- Why do excited electrons fall to intermediate orbitals before falling to ground state?
- Why, quantum mechanically, is chemical stability dictated by the filling of orbitals?
- Why is it when you crush something plastic (like a water bottle), you can't get it back to its original form?
- What determines a child’s temperament? Can the temperament of the parents predict what their future child might be not including external environmental and social upbringing?
| Why do some birds hop while some of them walk? Posted: 29 Apr 2019 05:05 PM PDT |
| Posted: 30 Apr 2019 04:00 AM PDT Author and biologist Thor Hanson is a Guggenheim Fellow, a Switzer Environmental Fellow and winner of the John Burroughs Medal. His books include Buzz, The Triumph of Seeds, Feathers and The Impenetrable Forest, as well as the illustrated children's favorite Bartholomew Quill. Hanson's work has been translated into more than 10 languages and earned many accolades, including the Phi Beta Kappa Award in Science and two Pacific Northwest Book Awards. His many media appearances have included "Fresh Air", "Science Friday", "On Point", "To the Best of Our Knowledge", and "Book Lust" with Nancy Pearl. Thor Hanson is the science correspondent for Nature: American Spring LIVE, a three-part series that showcases the transformations of plants and animals as the season changes. From bears leaving their dens to flowering trees to birds embarking on their epic migrations, the series highlights these natural springtime wonders while acknowledging the impact climate change is having on once predictable patterns and behaviors. Another goal of the event is to inspire people to go outside and get involved with citizen science, helping to collect data that is so important for climate change and seasonal research. The second episode, "Migrations", will air tonight on PBS and Facebook at 8/7c (check local listings). To catch up on the first episode ("Birth and Rebirth"), visit http://pbs.org/americanspringlive. Please join us with Thor at Noon ET (16 UT) and ask him anything! [link] [comments]  |
| How do spiders know where to build their webs? Posted: 29 Apr 2019 03:22 PM PDT Do they have any way of knowing where bugs generally fly? Is the one in my bathroom exceptionally stupid or is it just unlucky? [link] [comments]  |
| What makes someone a light sleeper or a heavy sleeper? Posted: 29 Apr 2019 05:15 PM PDT And is it possible for a light sleeper to become a heavy sleeper and vice versa? If so, why? [link] [comments]  |
| Posted: 30 Apr 2019 12:59 AM PDT |
| Do violent video games increase aggression in people? Posted: 30 Apr 2019 04:54 AM PDT |
| Is it possible to have 0 resistance? Posted: 29 Apr 2019 07:50 PM PDT Surely in the formulas this would break everything like V=IR and seems to break every rule, but what about firing singular electrons across a complete vacuum, surely there's no forces generating any resistance on it yet you're sending a current? [link] [comments]  |
| Why can the first electron orbital only hold 2 electrons? Posted: 29 Apr 2019 08:41 PM PDT |
| Why doesn't diarrhea kill us when it used to be so fatal? Posted: 30 Apr 2019 07:38 AM PDT When we get diarrhea, we generally don't take medicine for it & we don't die from it. Why was diarrhea so fatal back in the day? [link] [comments]  |
| Posted: 29 Apr 2019 02:50 PM PDT If so how would we ever detect them and what type of planets would surround it? [link] [comments]  |
| How much do crumple zones affect a cars stopping time? Posted: 29 Apr 2019 11:49 PM PDT Im doing research for a physics project and i cannot find how long a car without crumple zones takes to stop online, its usually just stated to stop abruptly, does anyone actually know how long on average a car without crumple zones takes to stop?? [link] [comments]  |
| Do new elements form at the center of a nuclear bomb explosion? Posted: 30 Apr 2019 01:18 AM PDT Obviously I'm not well versed in this subject but based on what I've heard, the center of the explosion is as hot as the sun for a very short time. Is that enought to form new and exotic metals or elements? If it does will be in meaningful quantities? Thanks! [link] [comments]  |
| Posted: 29 Apr 2019 06:30 PM PDT |
| What are the atmospheric levels of ethanol from wild sources? Posted: 30 Apr 2019 01:36 AM PDT Sorry if the word "wild" seems vague or incorrect, I couldn't think of a better word, but I refer to any source that isn't controlled by humans for human benefit, ie decomposition out in the natural environment. I can't find a clear answer with Google possibly due to not using the right words, but since matter is decomposing all the time, there will be ethanol created by yeasts etc around the world. What if anything is there in the way of a global "average" for the composition of air being ethanol? [link] [comments]  |
| Posted: 29 Apr 2019 07:30 PM PDT I've noticed lots that we don't actually know what causes cell mutation, its more or less just a link. e.g. if you smoke you have higher chances of getting cancer. Does this mean they don't actually know if smoking itself causes cancer but some aspect of smoking. So it could be the taste of nicotine affects cells leading to cancer? Just not sure.. [link] [comments]  |
| How do relativistic jets escape the singularity of black holes when nothing else can? Posted: 30 Apr 2019 04:51 AM PDT Black hole gobbles up star and an accretion disk forms. Makes sense. But how does the matter fall into the black hole then get blasted back out? Maybe it never falls past the singularity? Big space nerd but this has eluded me. [link] [comments]  |
| Posted: 30 Apr 2019 04:45 AM PDT |
| Posted: 29 Apr 2019 07:59 PM PDT Like if you pick up a slug and put it down somewhere else, how far do you have to move it so it won't come back? What's the typical range for a slug? [link] [comments]  |
| Why do excited electrons fall to intermediate orbitals before falling to ground state? Posted: 29 Apr 2019 01:11 PM PDT When an electron in an atom is excited it jumps up in energy levels, and then falls back down to a lower energy level and emits a photon. For the Balmer series, the visible emission spectrum of hydrogen, the wavelengths of light are produced by electrons falling to the second energy level. What causes it to stop there, if its just going to then fall to ground state immediately anyway [link] [comments]  |
| Why, quantum mechanically, is chemical stability dictated by the filling of orbitals? Posted: 29 Apr 2019 03:29 PM PDT Elemental fluorine is highly reactive, while Argon is not. Antiaromatic compounds are highly reactive, while aromatics are not. The chemist's explanation is along the lines of "Argon has a closed shell with all orbitals full, while fluorine does not, and aromatic compounds have their lowest pi-orbitals full, while antiaromatic compounds do not. Why does this make sense from the perspective of first-principles quantum mechanics? [link] [comments]  |
| Posted: 29 Apr 2019 09:51 PM PDT |
| Posted: 30 Apr 2019 01:20 AM PDT |
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