- AskScience AMA Series: I am Dr. Derek E. Lee, a wildlife conservation biologist currently studying giraffes in Tanzania and spotted owls in California. I have worked on several species in some wild, unusual places during my 16-years as a research ecologist, Ask Me Anything!
- Eletromagnets question, would making the coils closer togeather with thinner wire make the magnetic field stronger?
- Does a mirror have resolution?
- How long does it take an electron to orbit a nucleus?
- How many different supernovae contributed the carbon on Earth?
- If you're stranded at sea with a 50ft roll of tin foil, can you spread it out or some other arrangement to make you radar visible?
- Biologically, what causes a memory to become more permanent (become "learned") versus just being forgotten?
- About what percentage of current American Citizens are descendants of colonial Americans?
- Why do things like bread not mold immediatly? What prevents the mold fungus from expanding earlier?
- When increasing the temperature of a system, is the energy needed to increase the temperature linear, or something else?
- Why do leafs change color in the fall?
- Why do quasars have a circular accretion disc versus a spherical one?
- Is there a relationship between the Geometrical concept of a Secant/Tangent and the Mathematical concept of a Secant/Tangent?
- Aside from height, did homo sapiens look significantly different in the distant past?
- How does a gene mutation actually cause it's effect?
- Why Are Historic Settlements Often Found Buried?
| Posted: 06 Nov 2016 05:00 AM PST Hi Reddit! I am Dr. Derek E. Lee, a PhD wildlife conservation biologist who has worked on remote Pacific islands in Hawaii and California, the African savanna, and Western US forests. I've studied spotted owls, forest fire, elephant seals, seabirds, woodrats, salamanders, wildebeests and giraffes. I founded and run The Wild Nature Institute, an independent scientific research, education, and advocacy organization. I split my time between Tanzania, Switzerland, and the USA doing fieldwork, statistical analyses, paper writing, and fundraising. My research could be classified as population ecology, wildlife ecology, wildlife management, conservation biology, or just plain old ecology. I'll be on at 10 AM pacific time (1 PM ET, 18 UT), ask me Anything! [link] [comments]  |
| Posted: 06 Nov 2016 03:38 AM PST |
| Does a mirror have resolution? Posted: 05 Nov 2016 10:27 PM PDT Hi reddit, I was reading up on the use of mirrors in stellar photography today and was wondering if mirrors are able to perfectly reflect light, even from extremely far distances. For example, if you pointed your telescope at a mirror pointed to the sky, would you be able to see everything that you could by simply looking at the sky? Or is there some light distortion/absorption from the mirror? Thank you!! [link] [comments]  |
| How long does it take an electron to orbit a nucleus? Posted: 05 Nov 2016 11:23 PM PDT |
| How many different supernovae contributed the carbon on Earth? Posted: 05 Nov 2016 06:01 PM PDT Is it possible that the carbon (for example) that ended up on Earth all (or mostly) came from the same supernova? If not, how many supernovae contributed to the molecular cloud that coalesced to form our solar system? [link] [comments]  |
| Posted: 05 Nov 2016 08:03 PM PDT Just curious as I was reading about modern stealth warships and radar tech. Also watched Castaway recently and being stranded is a fear of mine! Can tin foil save your life at sea? If so, how much would it take and how would you have to set it up? [link] [comments]  |
| Posted: 05 Nov 2016 10:12 AM PDT |
| About what percentage of current American Citizens are descendants of colonial Americans? Posted: 05 Nov 2016 09:15 AM PDT I am referring to the U.S.A and Britain's 13 colonies for clarification. Alternatively: How many American Citizens have ancestors who immigrated to the country? I realize that this could be a difficult figure to come up with, if so what is the best estimate we have/can make? [link] [comments]  |
| Why do things like bread not mold immediatly? What prevents the mold fungus from expanding earlier? Posted: 05 Nov 2016 03:37 PM PDT |
| Posted: 05 Nov 2016 02:29 PM PDT To clarify, do I need the same amount of energy to increase a system from 400-500K as I do to increase the temperature from 1000-1100? [link] [comments]  |
| Why do leafs change color in the fall? Posted: 05 Nov 2016 06:07 PM PDT |
| Why do quasars have a circular accretion disc versus a spherical one? Posted: 05 Nov 2016 11:01 AM PDT |
| Posted: 05 Nov 2016 09:42 AM PDT So, in mathematics, secant is a mathematical function equivalent to 1/cos. But in geometry, it is also defined as a line that divides a curve. Tangent similarly has a mathematical definition and a geometrical definition. Is there a relationship between each of those two definitions? Also, is there some geometric line called a sine that relates to a curve in some way? [link] [comments]  |
| Aside from height, did homo sapiens look significantly different in the distant past? Posted: 05 Nov 2016 04:18 AM PDT As I understand it, modern humans have been around for about 150,000 years. Did we look significantly different then? What about 10,000, 1,000, or even 500 years ago? [link] [comments]  |
| How does a gene mutation actually cause it's effect? Posted: 05 Nov 2016 10:17 AM PDT So I understand our genes can effect all sorts of things about us. For example hair colour. If we have two people A and B that have identical genes except A has the gene for red hair and B has the gene for black hair, what happens differently between A and B for A to get red hair and B black hair? A bonus question, I have heard DNA being described as code. But would a config file be a better analogy? Or does DNA also contain the instructions for different mutations. TIA [link] [comments]  |
| Why Are Historic Settlements Often Found Buried? Posted: 05 Nov 2016 09:14 AM PDT There's probably an obvious answer to this but this has always perplexed me. When they find ancient cities and such they are often buried. How did they get buried? Where did all this extra dirt come from? Did the city sink? [link] [comments]  |
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