Is petrified and fossilized the same thing? |
- Is petrified and fossilized the same thing?
- Why is high blood pressure considered a bad thing? Wouldn't a higher pressure make it less likely for cholesterol particles to stick to the walls of your arteries?
- Can we use viruses to genetically modify organisms?
- Are there any common viruses that would be deadly like Covid if novel but aren't because we've all had them multiple times while young and healthy?
- Why Don't mRNA Vaccines' Lipid Nanoparticles Need Surface Proteins?
- Are you more or less likely to die having Covid-19 more than once?
- Can acceleration be felt in water?
- How big a role do flies play as pollinators?
- A giant asteroid hit Jupiter on Monday. Do the giant planets help protect Earth?
| Is petrified and fossilized the same thing? Posted: 17 Sep 2021 01:42 PM PDT |
| Posted: 17 Sep 2021 01:37 PM PDT High blood pressure is usually associated with heart attacks but I don't understand why. Wouldn't a pipe with high pressure be cleaner? Is high blood pressure a cause or a symptom of heart failure? i.e. is it not the blood pressure that is the problem, but the implication that higher blood pressure means their is a constriction somewhere in the artery? [link] [comments]  |
| Can we use viruses to genetically modify organisms? Posted: 18 Sep 2021 12:08 AM PDT From what I understand, viruses add to the dna of a cell to make it into a virus factory. But if we replaced the bit of dna a virus carries, could that allow for genetic modification? [link] [comments]  |
| Posted: 17 Sep 2021 08:06 PM PDT |
| Why Don't mRNA Vaccines' Lipid Nanoparticles Need Surface Proteins? Posted: 17 Sep 2021 10:52 AM PDT The mRNA vaccines are delivered via an LNP to encapsulate and protect the RNA so that it can be absorbed into cells to produce spike proteins. Yet viruses need glycoproteins to attach to the cell in order to inject their genetic material. If that's the case, why haven't viruses evolved to work the same way, and simply work via a simple lipid membrane? Why do viruses go through all the extra complexity of targetting specific cell receptors? [link] [comments]  |
| Are you more or less likely to die having Covid-19 more than once? Posted: 17 Sep 2021 05:20 PM PDT I was curious if people are more/less likely to die having Covid-19 two, three, ect times. [link] [comments]  |
| Can acceleration be felt in water? Posted: 17 Sep 2021 02:01 PM PDT I was wondering how the sensation of acceleration is felt when submerged in water. In general, it seems that while diving, gravity is not felt, which is why astronaut train for space walks under water. As a scuba diver, I know first hand that it feels like flying when diving under water. But this is when water stands still and acceleration equals gravity at 1g. Now I think it gets more interesting what happens when the water accelerates while one is diving in it. In the ocean the pressure rises by 1 bar every 10m which is linked to the 1g gravity (no gravity = no pressure if the water above you, on fact there wouldn't even be an above). So when we assume the total acceleration on the water container and diver is 2g, my assumption would be that the water pressure rises twice as fast when diving down, so 2 bar after 10m depth. But would the feeling of weightlessness still persist? The reason I ask is, could a micro water tank, basically a space suit filled with water, be used to nullify (or greatly reduce) the effect of the acceleration of a rocket launch? Would it be translated into pressure? Could this be used to make launches easier to support by untrained humans? Thanks for any insights. [link] [comments]  |
| How big a role do flies play as pollinators? Posted: 16 Sep 2021 11:59 AM PDT I have a small garden to grow culinary herbs, and one of the unexpected pleasures it provides is watching the insect activity. Particularly with the mint, several kinds of bees, wasps, and hornets visit regularly. Far and away more prevalent though are flies crawling around the blossoms, which leads to the title question. [link] [comments]  |
| A giant asteroid hit Jupiter on Monday. Do the giant planets help protect Earth? Posted: 16 Sep 2021 09:48 AM PDT What I'm asking is if having massive these gravitational wells between us and deep space helps to collect asteroids that would have reached earths solar orbit and potentially fall into our planet? It seems obvious, but I'm sure there is more to it. [link] [comments]  |
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