Questions in the Science & Nature category.
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July 24

What Are These Rock Formations?

Here is a pic I took in Little Cottonwood Canyon, Utah. What are these rock formations?
posted by my log does not judge at 5:43 PM - 7 answers

July 23

Help us understand this ring found on a bird

A dead bird in London, probably a pigeon, wore a ring around its leg with some writing on it. We are not sure what it means. [more inside]
posted by johngoren at 8:49 AM - 5 answers

July 22

Ideas for recruiting recent sexual assault survivors for research

I’m a researcher. My colleagues and I develop and test brief early interventions (i.e., for use in the first months after sexual assault) to help survivors recover. Participation in our studies involves either getting an intervention for free or giving feedback on an intervention we’re developing. These studies don't require in-person visits, and they’re all low risk and fairly low commitment. We pay participants, although survivors usually say they’re participating to help other survivors. Normally, we have a steady stream of recent survivors wanting to participate, but we’re having major problems finding participants right now, and need new ideas. [more inside]
posted by quiet coyote at 2:10 PM - 17 answers

July 20

Think Tank or Similar for Developmental Trauma

Not a group for survivors, but for the informed researcher and healer. A place to discuss matters pertaining to in utero to age 3 traumas, from a more scientific perspective with emphasis on trauma-informed knowledge, theory, exchange of experiences in the healing realm and therapeutics. Less science and more heat, mind and soul.
posted by watercarrier at 8:52 PM - 3 answers

July 18

What manner of soil is this?

What kind of soil is in this video of some people digging out a structure with simple tools? [more inside]
posted by Salvor Hardin at 7:11 PM - 9 answers

July 10

What is happening in this video of a tree being electrocuted?

I just saw this TikTok of a tree on fire because it’s touching a power line and I want to know more. [more inside]
posted by nouvelle-personne at 1:38 PM - 7 answers

July 8

Explain it like I'm five: high-pitched sounds and playback

My husband is older and has experienced some hearing loss. We have bats in the wall of our house (that will hopefully be tended to soon.) I could hear a bat squeaking in the wall and brought my husband over and he couldn't hear it. But when I held my phone up and recorded the bat squeaking, and then played the recording for him, he could hear it. Why is this the case?
posted by PussKillian at 9:39 AM - 8 answers

Help me take amateur photos of arteries in my wrist

I’d like to get good pictures of the colors (visible and infrared) of the arteries in my wrist. Is there a useful technique for increasing the transparency of the skin at the moment of the picture? Somehow I’m thinking that a very bright flash might do the trick, but I’m not sure what color that would be or even if it would work. I can build or buy any equipment necessary.
posted by Tell Me No Lies at 7:06 AM - 5 answers

July 4

Looking for pictures of used/bacterially healthy aquarium filter media

I'm wondering what good, healthy, well-used aquarium filter media full of beneficial bacteria looks like, but I can't find any photos of filter media except new-looking stuff. Anybody got some good photos showing green/brown slime that is definitely the good stuff? Thanks!
posted by amtho at 5:06 PM - 2 answers

July 2

Can anyone identify this plant or fungus remains?

I found my dog eating this in our backyard but we cannot figure out what it is or where it came from [more inside]
posted by christiehawk at 1:54 PM - 8 answers

June 28

What's the best tool for non-political geography?

Google maps and open street map are wonderful if I want to see the addresses,street view,or satellite photos of a location. But lately I've been wishing they could highlight a river watershed, or show the elevation differences, or display the biom type. Is there a tool that let's me find that information around the globe? I tried a few geography apps and they seem to focus on country borders or elevation only.
posted by rebent at 1:43 PM - 6 answers

June 27

How many fish are in the sea?

Are there any good counts of mesopelagic fish biomass by species or family? [more inside]
posted by Paragon at 8:33 PM - 4 answers

June 26

Lo-fi way to get even heat in vacuum former heating element

I built a 16" x 10" hobby vacuum former and so far it's working great except for one problem. The plastic is being overheated & thinned in the center. [more inside]
posted by i_mean_come_on_now at 3:48 PM - 6 answers

June 25

Neighbor painted his house black. Will my house be hotter or cooler?

Am I a tiny tiny tiny bit warmer, now because his house absorbs more heat? Or am I a tiny tiny tiny bit cooler because his house reflects less light? (Yes, I know, for all practical purposes, neither--our two houses are pretty close together, but I'm sure the difference is too small to be detectable either way. I just want to know which way.) [more inside]
posted by Don Pepino at 11:49 AM - 14 answers

Statistics Workbook

I'm working in the life sciences and infrequently have to engage with statistics, like ANOVA, ttests and general data analysis of High Throughput data. But due to the infrequency I always forget a lot of this stuff and have to relearn it. I once had a really great statistics workbook, it was among some 20 books I just grabbed from the statistics shelf from my library to see what works best for me. It was quite short on the explanatory text, but had some outstanding problems to work on, the kind that makes you really think about the stuff you just learned, and not just mechanically apply the same formula with different numbers. These questions were very well designed and the answers to them were lengthy, so that you really understood the solution. For me this is the best method for truly understanding something. I want to find such a book again, can you help me out?
posted by SweetLiesOfBokonon at 12:12 AM - 7 answers

June 20

Dampening echoes with slats

The library at University of Portland has vertical wooden slats on the walls. I'm told they're to help keep it quiet and minimize echoes. I'd like to make a panel of similar slats for my parents, whose house is new and very echo-prone. Does spacing of the slats matter? Can they be horizontal instead of vertical? Are there other design considerations I should take into account?
posted by sibilatorix at 6:46 PM - 13 answers

June 17

Danger of delta variant to unvaccinated loved one?

I have a loved one who is vaccine hesitant. They had COVID in March 2020 and believe they have enough natural immunity to be protected, and having read anti-vax literature don't think it's worth the risk to become vaccinated. I'd like to know their risks with the new Delta variant. [more inside]
posted by anonymous at 6:08 AM - 10 answers

June 15

Destiny and 239 Tadpoles

A few days ago, I scooped up some frog eggs. Now I have at least 239 Cope's gray tree frog tadpoles. [more inside]
posted by amtho at 2:57 PM - 14 answers

June 14

Abx vs chance improvement in cognition in senior w UTI @ vasc dementia

What are the odds a senior with vascular dementia and chronic bladder outlet obstruction (high PVR) would *randomly* show *significant* improvements in cognition on days 3-5 of an antibiotic for a UTI? [more inside]
posted by cotton dress sock at 9:40 PM - 15 answers

Fossil hunting near NYC/Philly

My 4.5-year-old loves fossils. Can you recommend any sites for fossil hunting within a 1-2 hours' drive from NYC or Philly? He's been to Big Brook in NJ but interested in finding other sites, too. Thanks!
posted by CiaoMela at 11:57 AM - 5 answers

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