How does masturbating "reduce the risk of prostate cancer"? Is it just a statistical correlation or is there a causal link? |
- How does masturbating "reduce the risk of prostate cancer"? Is it just a statistical correlation or is there a causal link?
- I added cold water to Everclear (95% Ethanol) and the bottle felt warm, why?
- [physics] what happens to atoms when they are extremely crammed together like in black holes or in neutron stars? Are the orbits of the atoms overlapping each other?
- How can the recently made C₁₈ ring have alternating single and triple bonds? Wouldn't the π orbitals allow every bond to be a double bond as well due to electron delocalization?
- After watching Mindhunters- how scientifically rigorous is the method of profiling?
- Why do substances mix better by first mixing the smaller amount then diluting it, rather than just mixing all of it at once?
- Do ants have any way of telling when they're climbing a tree that they're traveling against gravity and expending more energy?
- Why do microwaves cause sparks in metals but not regular light?
- Why do surgeons often amputate an appendage in the case of an open fracture (break where the skin breaks through) but rarely in the case of a close fracture?
- How do viruses actually cause disease?
- When you tag someone with a laser in a lasertag games, how does the gear knows who tag who ?
- How exactly do stains/ semi permanent dyes, etc, work?
- How does your body regulate bloodflow, for example if your body wants to get a lot of blood to your legs how does it make sure it gets there?
- What indicates a species is going to speciate?
- How does an oasis form in a desert?
- What makes a recyclable plastic eventually unable to be recycled?
- Would’ve Neanderthals been able to build and use boats?
- How effective is topical application of a systemic medication like Androgel, as a drug delivery method? How much of the drug actually gets absorbed into the body, and circulated to where it is needed, before it is washed or worn off?
| Posted: 24 Aug 2019 05:00 AM PDT My assumption has always been that there is some small correlation, rather than any medical link. It seems like it would be extraordinarily difficult to demonstrate any notable link. Or is it just a meme? [link] [comments]  |
| I added cold water to Everclear (95% Ethanol) and the bottle felt warm, why? Posted: 24 Aug 2019 01:22 AM PDT |
| Posted: 24 Aug 2019 04:55 AM PDT |
| Posted: 24 Aug 2019 07:12 AM PDT |
| After watching Mindhunters- how scientifically rigorous is the method of profiling? Posted: 24 Aug 2019 07:05 AM PDT While I love the show, I am wondering about the scientific rigor of profiling. Some thoughts: The nature of interviews with convicted killers often mean that the interviews aren't structured- questions that are asked of one perpetrator may not be the same set of questions asked of another (who have committed similar crimes). The perpetrators may not be entirely truthful. The selection process is also limited in that the agents can only interview killers who are caught and are willing to be conversational. [link] [comments]  |
| Posted: 24 Aug 2019 06:56 AM PDT And also are there situations where this mixing method is not the best one? [link] [comments]  |
| Posted: 23 Aug 2019 05:48 PM PDT |
| Why do microwaves cause sparks in metals but not regular light? Posted: 24 Aug 2019 06:04 AM PDT Are the microwaves in a microwave oven simply much more powerful than regular visible light? Would a bright enough light bulb or LED also cause sparking in metals? [link] [comments]  |
| Posted: 23 Aug 2019 03:56 PM PDT |
| How do viruses actually cause disease? Posted: 23 Aug 2019 06:38 PM PDT I understand that viruses infect host cells, and stimulate the production of more virus particles, but how does the presence of these small microbes actually cause sickness? [link] [comments]  |
| When you tag someone with a laser in a lasertag games, how does the gear knows who tag who ? Posted: 23 Aug 2019 01:23 PM PDT I don't understand quite well how you can manipulate a laser to transmit informations such as a username by shooting another player, knowing that there's not a lot of parameters you can manipulate in a laser (amplitude, wavelength, etc) and that the lasergun is pretty cheap [link] [comments]  |
| How exactly do stains/ semi permanent dyes, etc, work? Posted: 23 Aug 2019 06:29 PM PDT Please correct me if this is the wrong sub or it's been asked before. I've been using semi permanent dyes for years and recently got into henna. Both products say the longer you leave it on, the longer it stays/ the better the color, etc. But I've never been able to find anything saying when you've left it on past it's point of actually doing anything. Permanent hair dye stops doing anything after about 60 minutes, as far as my googling has told me. Is there a similar cut off for stains/ stain like dyes? [link] [comments]  |
| Posted: 23 Aug 2019 02:35 PM PDT |
| What indicates a species is going to speciate? Posted: 23 Aug 2019 01:45 PM PDT |
| How does an oasis form in a desert? Posted: 23 Aug 2019 12:37 PM PDT |
| What makes a recyclable plastic eventually unable to be recycled? Posted: 23 Aug 2019 01:05 PM PDT I heard there's a limit to how many times a recyclable plastic can be recycled before it simply can't be done anymore. What is the state of the plastic right before the end of its lifecycle? What's the plastic like when it's no longer able to be recycled? [link] [comments]  |
| Would’ve Neanderthals been able to build and use boats? Posted: 23 Aug 2019 04:47 PM PDT |
| Posted: 23 Aug 2019 10:33 AM PDT Dimethyl sulfoxide is known for dissolving right into the skin, and can even carry other compounds in with it. But it is a small solvent molecule, so it is easy to see that it would be mobile. But Testosterone is a 21 heavy atom crystalline solid. So it's hard to imagine it getting any deeper than the top layer of dry, dead skin, let alone reaching the circulatory system, unless something like a patch is used to maintain contact over an extended period of time. Is there some mechanism for transporting material down through the skin layers? Or does almost all of a topical application like Androgel just get wasted, because it is worn off or washed off before it can be absorbed? [link] [comments]  |
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