Can other species get Down syndrome/trisomy 21? |
- Can other species get Down syndrome/trisomy 21?
- What did I see in the sky last night?
- How is the effective exhaust velocity computed for rockets with non-homogeneous propellants?
- Why does evaporating water leave rings rather than a solid deposit or a gradient of deposit?
- What living bird species likely has a genetic code that is most similar to the most recent common ancestor of all birds?
- What happens medically when you get the wind knocked out of you?
- Why do all of the planets orbit the sun on the same plane?
- Why do batteries in electronic devices typically alternate which way they need to be inserted?
- How does a Stellate Ganglion Block (SGB) help treat PTSD?
| Can other species get Down syndrome/trisomy 21? Posted: 16 Nov 2019 03:20 AM PST Some species don't have 21 pairs of chromosomes but can they get a Down syndrome like disorder ? [link] [comments]  |
| What did I see in the sky last night? Posted: 15 Nov 2019 06:23 PM PST I'm currently traveling the Philippians with some friends. Last night around 6pm, we were at a beach bar looking up at all the beautiful stars and then we saw something so strange! It was about 20 "stars" evenly spaced, moving at the same speed all in a straight line from the right oh the sky and disappearing in the middle. They were the same brightness as the stars. Does anyone have any idea what they could be? Was it military planes? Satellites? A strange linear meteor shower? [link] [comments]  |
| How is the effective exhaust velocity computed for rockets with non-homogeneous propellants? Posted: 16 Nov 2019 12:37 AM PST For a rocket with multiple different species of molecules in the exhaust, such as a O2-H2 rocket with 4:1 (by mass) ratio between oxidizer and fuel, resulting in (simplified) exhaust of H2O and H2 at a ratio of 9:1 by mass (or equal amount of molecules), how exactly does one compute the effective exhaust velocity, and thus specific impulse? I tried googling for it, but every equation and calculator I can find just assumes a single molecular mass. Is there some easy way of averaging out the molecular mass that it can be plugged into the normal formulas, or is something more complex needed? [link] [comments]  |
| Why does evaporating water leave rings rather than a solid deposit or a gradient of deposit? Posted: 14 Nov 2019 10:29 PM PST |
| Posted: 14 Nov 2019 11:32 PM PST What species of bird has undergone the fewest amount of changes in its genetic code, since modern birds first evolved? Is there any way to tell that? With the genetic material we have available from both living and extinct species of birds, we can reconstruct the genetic structure of the most recent common ancestor to all birds, to some extent. Could we compare that to the genomes of living birds, to see which birds' genetic material has changed the least? Another way to put my question might be: genetically speaking, which species of bird has evolved the least, from the time when birds first evolved? [link] [comments]  |
| What happens medically when you get the wind knocked out of you? Posted: 14 Nov 2019 06:22 PM PST I remember how bad it sucked as a kid. Falling from a high place flat on my back and it being hard to breathe. I don't understand what made it hard though. Knowing physics the air shouldn't actually be knocked out of you... Right?? [link] [comments]  |
| Why do all of the planets orbit the sun on the same plane? Posted: 14 Nov 2019 04:26 PM PST When you see model and renderings of the solar system you always see all the planets on the same plane. Is this becuase its easier to visualize that way or do all the planets really orbit the same plane? [link] [comments]  |
| Why do batteries in electronic devices typically alternate which way they need to be inserted? Posted: 14 Nov 2019 05:47 PM PST |
| How does a Stellate Ganglion Block (SGB) help treat PTSD? Posted: 14 Nov 2019 08:19 PM PST What role does the Stellate Ganglion play in PTSD? How does administering anesthesia to this area impact PTSD symptoms? [link] [comments]  |
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