If we defined the meter as a static portion of the width of the universe (so as one expanded in size, the other did proportionally), about how much would our meter be expanding in, say, an hour? |
- If we defined the meter as a static portion of the width of the universe (so as one expanded in size, the other did proportionally), about how much would our meter be expanding in, say, an hour?
- Why is Plutonium-239 fissile but Plutonium-238 isn't?
- If our cells are constantly dying and being replaced, why do tattoos exist for so long?
- When landing on the Moon, did we approach the surface going the same direction of its spin to reduce the amount of horizontal velocity needed to be scrubbed?
- If the symptoms of COVID-19 are so similar to flu/cold symptoms, how did doctors discover this was a brand new virus?
- How is sweat dealt with in space?
- What would happen if a tectonic plate broke in half?
- Does commercial lumber contain enough infect fragments of DNA from the tree that produced it, for genome reconstruction and analysis?
- Why don't we get goosebumps on our faces?
- How did the ancestors of Aboriginals get to Australia?
- Are there any promising advancements being made in broad spectrum antivirals?
- Do Galactic Cosmic Ray's affect our climate?
- If you get a deep cut on your finger, Is the regenerated fingerprint identical to the one you had?
- What is the difference between wild dogs and wolves?
- If a larva were to lose an appendage or other body part, how does this affect pupa development, overall metamorphosis, and the final imaginal stage?
- Why can't all viruses transmit between species?
- What makes certain vegetables digestible to humans and other plants not?
- The body has tons of useful bacteria, how does the body decide which bacteria to keep around, and which to kill?
| Posted: 11 Mar 2020 06:33 PM PDT (This may be better suited for a strictly maths-based sub, but I can't tell.) By "width of the universe", I'm not talking about the observable universe, but rather I'm referencing the rate at which space itself seems to be expanding. (Although I would be interested in using the observable universes growth as our constant as well). Perhaps my question doesn't have enough constraints to be answerable, or perhaps it's already a well-observed constant? My apologies if it's easily calculable. I just wouldn't even know where to go looking for info on this, or how to rigorously describe my question, for that matter. [link] [comments]  |
| Why is Plutonium-239 fissile but Plutonium-238 isn't? Posted: 12 Mar 2020 02:24 AM PDT |
| If our cells are constantly dying and being replaced, why do tattoos exist for so long? Posted: 11 Mar 2020 09:09 AM PDT |
| Posted: 11 Mar 2020 04:38 PM PDT As I understand, when we launch rockets into orbit, we point them eastward to get a kick in horizontal velocity from the Earth's rotation. This makes me think it would make sense to do the same when landing. I'm thinking that approaching in the direction of the celestial body's spin would mean we have less horizontal velocity to scrub off before landing. If this assumption is correct in a general sense, does it really matter for the Moon since it only rotates once approximately every 27 days? [link] [comments]  |
| Posted: 11 Mar 2020 11:18 AM PDT |
| How is sweat dealt with in space? Posted: 11 Mar 2020 10:23 AM PDT So I know that there are multiple workout things on the ISS, like the cycle/treadmill. I would imagine that astronauts would sweat at least a little on the cardio workouts. So what happens to that sweat? Does is stay on the skin due to surface tension, or does it come off the body all together? And if it does come off the body, how is it dealt with, so it doesn't float away and mess with hardware? [link] [comments]  |
| What would happen if a tectonic plate broke in half? Posted: 11 Mar 2020 03:02 PM PDT |
| Posted: 11 Mar 2020 05:02 PM PDT |
| Why don't we get goosebumps on our faces? Posted: 11 Mar 2020 12:57 PM PDT |
| How did the ancestors of Aboriginals get to Australia? Posted: 11 Mar 2020 11:52 AM PDT From what i've read, despite islands/more land being available, at some point there was deep ocean that had to be crossed. Was it more than one crossing and how many people at minimum would need to cross for a population to be viable? [link] [comments]  |
| Are there any promising advancements being made in broad spectrum antivirals? Posted: 11 Mar 2020 12:27 PM PDT I remember there being some media buzz about "DRACO" several years ago, but I believe that project sort of fizzled out. [link] [comments]  |
| Do Galactic Cosmic Ray's affect our climate? Posted: 11 Mar 2020 04:38 PM PDT |
| If you get a deep cut on your finger, Is the regenerated fingerprint identical to the one you had? Posted: 11 Mar 2020 04:15 AM PDT |
| What is the difference between wild dogs and wolves? Posted: 11 Mar 2020 11:50 AM PDT What makes a wild canine a wild dog or a wolf or something else? My googling has been less than helpful. [link] [comments]  |
| Posted: 11 Mar 2020 06:37 AM PDT My understanding is during metamorphosis there is a near-complete breakdown of the larva in to small building blocks. Essentially, the larva matures to the point that it begins releasing enzymes capable of dissolving tissues. As the body is being liquidated (literally), groups of cells begin to organize. From these cells, eyes, wings, and legs begin to form. Eventually this transformation is finalized and the body is completely reassembled. This is the imaginal stage. I wonder what would happen if portions of the initial larva body were missing (e.g. limbs, organs, or bite from a predator)? How would this hinder the development of the pupae? Without some of these building blocks, could metamorphosis be survived? I understand this is a broad question with a lot of considerations. Unfortunately, most articles I've read on metamorphosis assume and fully intact larva. I also apologize in advance if I've gotten any of these terms incorrect. I hope it doesn't distract from my question. Thanks for your insights! -- For context, I'm raising mealworm larva and recording their ability to digest non-biodegradable materials like styrofoam and various polyethylenes. I've noticed many of the larva will choose to cannibalize pupae for their liquids, if I do not offer water every 3-4 days. Once the imaginal stage is complete and darkling beetles appear the beetles will also resort to cannibalism. Unlike mealworms, darkling beetles do not consume styrofoam or polyethylene plastics. Instead, they get all their nutrition from eating larva and pupae. This raises the question as to whether or not a mealworm, after being attacked by a darkling beetle, experiences the pupa stage and overall metamorphosis process differently than a mealworm left otherwise unharmed. [link] [comments]  |
| Why can't all viruses transmit between species? Posted: 11 Mar 2020 03:00 AM PDT |
| What makes certain vegetables digestible to humans and other plants not? Posted: 10 Mar 2020 08:10 PM PDT Specifically things like lettuce, spinach, and broccoli. Our digestive system can't get nutrients from grasses, leaves, and most other green plants, so what makes these ones different? [link] [comments]  |
| Posted: 11 Mar 2020 02:01 AM PDT Our bodies have around 100 trillion "good" bacteria, what stops it from killing all those bacteria? How does the body know if one bacteria is good to keep around, and another (lets say E.coli, as an example) is bad and needs to get rid of it (puking, whatever other countermeasures the body has). Bonus question I thought of while writing this one, is the bacteria there from birth? If so, how is that possible? [link] [comments]  |
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