Does having the common cold increase your immune response in the short term to other infections? |
- Does having the common cold increase your immune response in the short term to other infections?
- I heard in class that the reason why the core of the earth is iron is because iron is so dense and sank to the bottom. If that’s true, then why aren’t heavier metals like uranium and lead on the inside of the core?
- Are there any elements in the earths crust which are anomalously abundant?
- How were the water masses on earth and how did they function before trees or plants appeared?
- Does every colour of light which is produced by mixing two or more colours from the visible spectrum, look identical to the human eye to a single particular wavelength?
- Why is sugar sticky?
- Did we make engines first and searched for a compatible oil and gas OR oil and gas was found first and engines were made to work with it?
- When you close your eyes, do your lenses contract or relax?
- What do Mars' moons look like from the surface of Mars?
- Is there a limit on how big a lake can be?
- How do researchers estimate that 90 percent of indigenous people in the Americas perished by introduced diseases?
- What types of common chemical compounds could have been isolated and stored with the technology available in the first millennia AD?
| Does having the common cold increase your immune response in the short term to other infections? Posted: 12 Sep 2021 03:11 PM PDT |
| Posted: 12 Sep 2021 01:48 PM PDT |
| Are there any elements in the earths crust which are anomalously abundant? Posted: 13 Sep 2021 06:33 AM PDT Speaking of the types of planets which are similar to earth, is there more or less gold, for example than there should be according to our current models of how a planet forms? ****Could there be a planet out there with abnormally high deposits of a certain mineral or element? I know there's asteroids out there that contain a lot of a certain element and we've been considering(?) harvesting them. [link] [comments]  |
| How were the water masses on earth and how did they function before trees or plants appeared? Posted: 13 Sep 2021 02:29 AM PDT So, I before plants ever existed I suppose there were already water masses like oceans, seas and, I suppose, the cycle of rain water already existed. Therefore there must have existed already rivers, right? Should we imagine that time where plants didn't exist then like naked ground and rock with rivers running down to the sea? The question might be a bit obvious for some but I have a hard time imagine such a landscape. Would it have been like say... the Colorado Canyon but without any kind of plant or tree around? excuse any typo, I'm not a native English speaker and you might find errors in the text:) thanks in advance! [link] [comments]  |
| Posted: 13 Sep 2021 04:54 AM PDT |
| Posted: 13 Sep 2021 06:14 AM PDT Suppose you dropped a puddle of sugary liquid to the kitchen table and suppose it sticks to your hand. Why's it sticky? Why is hydrated sugar sticky? [link] [comments]  |
| Posted: 12 Sep 2021 11:56 PM PDT |
| When you close your eyes, do your lenses contract or relax? Posted: 12 Sep 2021 09:40 PM PDT It is a common tip to ease the strain on your eyes by looking at something very far away to let your lenses relax. This is for when you look at something very close for extended periods of time. But what about when you close your eyes completely? Do your eyes know not to contract when looking at nothing (despite your eyelids literally being the closest thing you can "look at") [link] [comments]  |
| What do Mars' moons look like from the surface of Mars? Posted: 11 Sep 2021 03:17 PM PDT How visible are they from the surface and how do they compare to what Earth's moon looks like to us? Thanks for indulging my curiosity! [link] [comments]  |
| Is there a limit on how big a lake can be? Posted: 11 Sep 2021 04:33 PM PDT |
| Posted: 11 Sep 2021 03:52 PM PDT I have read estimates like these and they are quite shocking. I wonder how they came up with this estimate. Also do we know of mass burial sites? do the oral traditions of different peoples have stories thaa at tell of the staggering loss of life? It's just hard to get my head around. [link] [comments]  |
| Posted: 11 Sep 2021 02:38 PM PDT For the purposes of the question, let's assume that we are looking for something that is mostly free of impurities. I'm thinking of things like over the counter bleach, ammonia, isopropyl alcohol, hydrogen peroxide, and other things you'd find at a pool supply store. But also thinking about some of the more fun reactions that would look like magic, like the precipitation of thallium triiodide from a clear solution, or pharoah's serpent, or the barking dog reaction? I'm really curious about the level of chemistry that could have been achieved without all of the things we see in a typical lab, and without access to raw, relatively pure components. [link] [comments]  |
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