Questions in the Science & Nature category.
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December 11

ISS Solar Transit

It looks like ISS will transit the sun in Tuscaloosa, AL (33.206667, -87.534722) on Wednesday Dec. 13. The three tools that I've looked at show slightly different ideal locations and times for the transit. Who should I believe:
posted by gregr at 8:51 PM - 2 answers

December 10

Heat of fusion of high pressure water ice?

Is the specific enthalpy of fusion for each of the high density forms of water ice; ice III, ice V, and ice VI, lower than that of standard water ice Ih? [more inside]
posted by pjbw at 12:17 PM - 3 answers

December 9

Mixing potassium citrate and La Croix?

For a potassium source that's not too basic, I'm adding potassium citrate to La Croix sparkling water, which I'm assuming is acidic (carbonic acid?). What is happening when it starts fizzing? [more inside]
posted by zeek321 at 10:32 AM - 7 answers

December 8

Inspirational book for a future entomologist (with a spider focus) ?

A good and terribly brilliant friend is currently a college freshman with a life-long enthusiasm for the insect world, and an eye toward a career in entomology. Her passion: spiders. I'd like to find a book on spiders (or on the greater world of insects) for her as a Christmas gift, something special. [more inside]
posted by Auden at 2:10 PM - 13 answers

December 6

What did I see in the sky over the Monterey Bay last night?

Last night, I saw a bright light in the sky South of Santa Cruz, CA, which was predicted on the radio, but I missed what the object was. [more inside]
posted by subocoyne at 11:11 AM - 3 answers

December 3

Where are all the natural nature photographs?

Where are all the nature photographs at? I am looking for photos (or sites that reliably host them) of forests, deserts, tundras, what-have-you, which are NOT retouched or color saturated. This can be anything from an artist's portfolio to family vacations, it just has to be real. [more inside]
posted by karmachameleon at 10:42 PM - 7 answers

November 30

Serious treatment of alien civilisations?

Where can I find serious investigation into what alien civilisations could be like, assuming they exist? [more inside]
posted by StephenF at 6:54 AM - 7 answers

November 28

What statistical measure compares a subset and its larger group?

I'm looking to compare an employer's racial/ethnic representation to the population of the geographic region where it is located. I know nothing about statistics. Is there a statistical measure I should use to characterize the size / significance of the employer's deviation from the larger population? [more inside]
posted by kensington314 at 3:01 PM - 8 answers

More biological learning systems?

I've been building a list of ways that biological systems accumulate knowledge. Which ones am I missing? [more inside]
posted by clawsoon at 6:04 AM - 17 answers

November 27

The curious non-abilities of humankind

What kinds of non-abilities are some small percentage of humankind born with that don't affect their everyday life and, in fact, may not be discovered as a non-ability until later in life? [more inside]
posted by serelliya at 1:40 PM - 33 answers

November 23

What experiment can I do to show that the Earth is a spheriod?

Flat Earthers fascinate me. Mostly because it's such a pure conspiracy theory; it's good to see someone standing up to Big Sphere. What kind of experiment could I carry out for an open-minded Flat Earther that would demonstrate the Earth isn't a disk? There's the old "ship disappearing beyond the horizon" thing, but that's something you rarely (if ever) see with your naked eye. Presume that I'm willing to throw a little but of money into this. [more inside]
posted by Betelgeuse at 6:42 PM - 41 answers

What ducks are these?

Are these ducks escaped domestic ducks of some kind, or are they a weird species of wild duck that I'm unfamiliar with? [more inside]
posted by Johnny Assay at 10:07 AM - 5 answers

November 21

Evolution 101

What are some good books to explain the basics of evolution and how it works while countering creationism and ID? [more inside]
posted by thedarksideofprocyon at 5:55 PM - 16 answers

November 18

Species which went extinct because of super-specific sex?

I'm sure that I've read about species (animal or plant) which went extinct because they had some specific sexual habit or preference or requirement which turned out to not be very robust in the face of change. However, I'm having trouble thinking of any examples now. Is this a thing that actually happens? Can you think of examples?
posted by clawsoon at 3:51 PM - 14 answers

November 17

Dr. weight loss advice not following laws of physics e.g., prison camps

Thought experiment: two conflicting concepts regarding weight loss where the math doesn't add up and is completely contrary to real life conditions. [more inside]
posted by Arachnophile at 2:38 PM - 22 answers

November 15

165 eathquakes in 12 hours.....?

I visit this site a few times a week and have never seen this many recorded before. No where close. Is this unusual? If so what's up?
posted by haikuku at 1:11 PM - 5 answers

November 12

Ancient Iodine

I have this extremely vintage-iconic iodine bottle in my bathroom. As far as I can tell my mother gave it to me after her mother gave it to her. How old is it? [more inside]
posted by tehloki at 10:02 PM - 8 answers

November 9

Neurological/Health Benefits In Tying Unseen Knots?

I have a designed a pair of sarong-like pants where when you complete "putting them on" you finish the process by tying a shoelace/bow knot behind you just below your lower back. Because of this you cannot see the knot being tied. Is there neurological/Health benefits tying this unseen knot?
posted by goalyeehah at 11:02 AM - 9 answers

November 8

Fucking magnets, how do they work, etc.

OK so I used the concept of "when you were in 3rd grade and you laid a non-magnetic metal next to a known magnet next to each other and you looked in your desk the next day and they were both magnets" in a facebook comment recently and then realized: [more inside]
posted by tivalasvegas at 2:41 PM - 12 answers

Can mirror-finish, outdoor stonework be 100 years old?

Can mirror-finish, outdoor stonework be 100 years old? [more inside]
posted by XMLicious at 2:08 PM - 8 answers

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