- Since mosquitoes and flies find their prey partially by following the odor of CO2, will increasing ambient CO2 in the atmosphere interfere with their ability to hunt? What concentration would we expect to see an impact?
- When a person develops an alcohol tolerance by drinking frequently, does that mean their BAC is actually lower after a drink than the average person?
- Is there any indication that extinct mammoths and mastodons support large fleshy trunks from looking exclusively at their skeletons?
- What happens if a volcano erupts violently underwater?
- How do Powerful North American East Coast Earthquakes Happen?
- How do crest whitening strips work to whiten teeth on a molecular level?
- What's the difference between the 'cell-mediated immunity' & the 'antibody immunity'.?
- If hydrogen doesn't contain any neutron, how does nuclear fusion lead to the creation of elements containing neutrons?
- Is COVID-19 reinfection unusual?
- How does the body deal with virus/bacteria mutating inside it? Can an pathogen mutate and the existing immune response be rendered useless?
- When walking across a rope bridge that is potentially weak equally throughout, is the greatest stress point in the middle or on one of the ends?
| Posted: 23 Jul 2021 06:43 PM PDT |
| Posted: 23 Jul 2021 02:19 PM PDT |
| Posted: 23 Jul 2021 07:01 PM PDT The idea popped into my head when looking up the skeletons of ancient mastodons and mammoths. We know they have trunks because of their living cousins, the very few soft tissue fossils that were fortuitously preserved, and ancient human artwork like Rouffignac Cave, but does soft tissue structure like this leave any indications on the bones themselves? In the paleo artwork I see, usually the trunks are drawn to be proportional to those of modern elephants, but what if this trait is more like Darwin's finch beaks where there's a whole range of lengths and shapes tailored to the animal's environment? We even have the Pygmy mammoths (akin to Darwin's finches) living off islands in California which had classic island dwarfism traits. Can we hypothesize any other morphological changes in them as well? This makes me wonder what other flesh structures on ancient creatures we've completely missed out on in the fossil record. An elephant would look pretty silly without its trunk, and there might be many ancient species we have very very incorrect understandings of their actual shapes. [link] [comments]  |
| What happens if a volcano erupts violently underwater? Posted: 24 Jul 2021 02:27 AM PDT What happens if a volcano as powerful as krakatoa erupted deep underwater, could this even happen? why/why not [link] [comments]  |
| How do Powerful North American East Coast Earthquakes Happen? Posted: 23 Jul 2021 11:26 PM PDT How did the 1817 or 1929 earthquakes happen? There's no subduction zone or fault per the article I'm reading (https://www.livescience.com/39507-bermuda-triangle-earthquake-1817-tsunami.html). The article says that there are just earthquakes along the continental shelf. Is there any research into the mechanisms behind this? Or has there been subsequent research finding something else at fault (geology pun :)? Is it just a fluke? Is it unknown? I couldn't find anything about these earthquakes with a big of digging. [link] [comments]  |
| How do crest whitening strips work to whiten teeth on a molecular level? Posted: 23 Jul 2021 02:25 PM PDT Iirc it's hydrogen peroxide in a gel form, but is it's absorbed into the teeth or does it dissolve a layer, or something? [link] [comments]  |
| What's the difference between the 'cell-mediated immunity' & the 'antibody immunity'.? Posted: 24 Jul 2021 03:08 AM PDT Several newspaper outlets report these two figures as measuring markers of herd-immunity whilst giving results of the seroprevelance survey done. What's exactly the difference between the two? Cell Mediated Immunity vs the antibodies? [link] [comments]  |
| Posted: 23 Jul 2021 08:20 AM PDT |
| Is COVID-19 reinfection unusual? Posted: 23 Jul 2021 09:10 AM PDT And is it true that reinfection comes with more serious symptoms? If you could attach studies/papers of reputable sources that'd be great. Thanks in advance. [link] [comments]  |
| Posted: 23 Jul 2021 07:25 AM PDT |
| Posted: 22 Jul 2021 10:09 PM PDT I was watching a show where a heavy character was walking across a weak bridge and was wondering where the most dangerous part would be. [link] [comments]  |
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