Questions in the Science & Nature category.
Displaying 21 through 40 of 5315 (random). Subscribe:

June 4

Science/evidence based help/treatment to grow longer nails?

My nails grow so very slowly, and I want longer prettier nails. Are there any supplements or external topical treatments to help them grow faster that have actually been proven to work by science?
posted by skjønn at 10:01 PM - 12 answers

June 2

After one sleep-deprived night, I'm OK the 1st day, tired the 2nd. Why?

Here's a pattern that happens to me a lot. Say I sleep 4-5 hours on Sunday night, instead of my preferred 7-8. I feel fine all day Monday, then sleep 8 hours Monday night. On Tuesday, I feel exhausted and mentally foggy. Is this pattern documented in others? Is there a physiological explanation? [more inside]
posted by aws17576 at 8:44 PM - 19 answers

Flower ID

What is this flower? It's been identified as a yellow lupine, but my better half doubts it and wants a second opinion. Since I don't know any group of people more opinionated that Mefites, here we are.
posted by pjern at 7:52 AM - 6 answers

June 1

What kind of bug is this?

Can anyone identify the bug in this paperweight? Thanks in advance!
posted by hellomina at 3:48 PM - 2 answers

Can you recommend a chemical reaction?

I'm looking for an example of a common chemical reaction in which a specific combination of a few reactants yields one product, but the introduction of one additional reactant yields an entirely different product. This is for the purpose of a literary metaphor. The less esoteric the reaction, the better (i.e. if it consists of commonly recognized substances that would be helpful).
posted by enzymatic at 9:31 AM - 25 answers

May 31

What would happen if I let a leech leech?

There are leeches in a pond near here. What would happen if, out of curiosity, I let a leech latch and lunch? Any significant danger to me or the leech?
posted by pracowity at 2:01 PM - 16 answers

What is the origin of the name of the James River?

No one seems to know when the tributary of the White River now called the James River (in Missouri) was named or who named it. Henry Schoolcraft traveled to the Ozarks in 1818-1819. In a View of the Lead Mines of Missouri (1819) he refers to it as the James River. In the 1820s, it was called the James Fork of the White in references in dealing with the relocated Delaware Reservation on that stream. [more inside]
posted by clockworkjoe at 10:43 AM - 7 answers

May 30

When seeing roadkill, do you swerve, or smush?

From an ecological standpoint: When there is roadkill in the road, is it better to swerve around it, or run over it? [more inside]
posted by The otter lady at 4:40 PM - 19 answers

Name That Critter! (Sespe Wilderness Edition)

While hiking to the Sespe Hot Springs in the Los Padres National Forest over the weekend, I kept hearing this vocalization. (The low moaning one that repeats six times.) What creature is it?
posted by mykescipark at 7:27 AM - 4 answers

May 25

How to get motion-activated pics of an animal?

An animal's den has appeared. Gophers which were near the den before have disappeared. There are bobcats and foxes around here and now and then scat turns up that doesn't belong to a domestic pet. I would like to get a few pictures of this new resident. [more inside]
posted by jet_silver at 8:43 AM - 7 answers

May 24

Which of these spaces can store more records?

I own a record store and am considering a new location as I'm out of space at my current one. However, I’m pretty innumerate and not spacially inclined. I’m therefore having difficulty determining which of these two locations will allow me to display the most inventory. Could those of you good with spaces and floorplans please help me decide? Details inside. [more inside]
posted by You Should See the Other Guy at 12:50 PM - 9 answers

We're all cat experts, but where are the cat PhDs?

I would like to read any great science writing out there on cats -- particularly, that focusing on interspecies communication. But I'll take whatever I can get! [more inside]
posted by melissa may at 6:31 AM - 7 answers

May 20

Entomologists of MeFi! WTF is this weird-ass bug thing?

I came across this weird bug feeding on a lilac bush while walking my dog this evening. I have never seen anything remotely like it. [more inside]
posted by torisaur at 5:52 PM - 8 answers

May 17

Just the nutritious facts, ma'am.

I'm looking for the best book (or other source) on nutrition. Not a diet book. Not anything with an opinion (to the extent that's possible). I just would like to read a book that describes what's going on with our bodies and the foods and nutrients we put into them. How exactly are the major nutrients metabolized? In what order over what time period? What are the functions of the various amino acids? What do the various vitamins and minerals do? And so forth. I just want to know what's going on, because I can't read a thousand diet and exercise books all pushing some points over others. I have a technical background, so I can handle and appreciate decently-complex explanations of biochemistry and the like. In fact, I like that stuff. Just as long as it starts at the beginning and builds up to that. So just, the cold, hard, comprehensive facts on nutrition, please. [more inside]
posted by KinoAndHermes at 4:42 PM - 14 answers

Apparently I don't understand percent concentrations... a little help?

In my workplace there is a reference to a "12% NH4OH" reagent that is prepared by diluting 20 mL of NH4OH to 50mL with H2O. It's obvious to me that this isn't a v/v concentration but I cant see how the formula makes it either a 12% w/w or a 12% w/v concentration. Assuming that we're starting with reagent grade (29% assay) NH4OH, which is it... and how does it work out to 12%? [more inside]
posted by whatisish at 4:13 PM - 9 answers

Fruit and veg batteries

Potato batteries and various forms of citrus batteries are, as best as I can tell, most accurately described as chemical batteries. But that sounds so boring! Do they not have a more sciency name? Like electroconvalent batteries or something? [more inside]
posted by Iteki at 1:15 PM - 6 answers

May 12

Local plant identification guide?

I am on the hunt to learn more about nature! I live in southwest michigan. I'm hoping to find a book (supplemented by an app maybe) that will help me identify plants. My criteria are: (a) pocket/bag sized (b) more information than just what the plant is named (c) good form factor/durability, (d) good for a beginner - I don't even know the difference between a beach and a birch, I probably don't need a book that has 107 different types of maple tree listed out - but maybe I do! Please help a beginner
posted by rebent at 6:02 AM - 7 answers

May 10

Safety Data Sheet or paper for C. elegans

I'm looking for a manufacturer-published SDS or a peer-reviewed paper that explicitly states the hazard information and precautionary statements associated with wild-type C. elegans. [more inside]
posted by metaBugs at 9:57 AM - 2 answers

May 4

I happen to know the day is Wednesday.

What is this unearthly plant? [more inside]
posted by popcassady at 4:10 AM - 3 answers

May 3

Mechanism design

A simple mechanism made of two identical gears can be used to reverse the direction of rotation without changing the speed of rotation. Is there a simple planar linkage (e.g. 5-bar or 6-bar) with only rotary joints and rigid links that can do the same thing? [more inside]
posted by Behemoth at 12:48 PM - 23 answers

« Older questions | Newer questions »