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stealth-science · 4 hours
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Mineraloid is a naturally occurring substance that resembles a mineral but lacks a crystalline structure. Unlike minerals, which have a specific chemical composition and a crystalline internal structure, Read more here:
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stealth-science · 7 hours
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Wenhao Xu, Faraz A. Burni, and Srinivasa R. Raghavan. Reversibly Sticking Metals and Graphite to Hydrogels and Tissues. ACS Central Science, https://doi.org/10.1021/acscentsci.3c01593
Submitter comment: This paper is wonderful, and a pretty accessible read. The premise sounds like a half-assed science fair project: what happens when you stick electrodes on food in your kitchen and run a DC current through it? Turns out you get an unexpectedly strong and often reversible adhesion between the soft food and the hard electrode that even works underwater. Even the authors are like “how the hell was this not discovered two centuries ago”
Also, in the materials section:
All the meat, fruits, and vegetables were purchased from Whole Foods.
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stealth-science · 9 hours
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stealth-science · 12 hours
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A murder mystery film set in a medieval village. After an outbreak of plague, the villagers make the decision to shut their borders so as to protect the disease from spreading (see the real life case of the village of Eyam). As the disease decimates the population, however, some bodies start showing up that very obviously were not killed by plague.
Since nobody has been in or out since the outbreak began, the killer has to be somebody in the local community.
The village constable (who is essentially just Some Guy, because being a medieval constable was a bit like getting jury duty, if jury duty gave you the power to arrest people) struggles to investigate the crime without exposing himself to the disease, and to maintain order as the plague-stricken villagers begin to turn on each other.
The killer strikes repeatedly, seemingly taking advantage of the empty streets and forced isolation to strike without witnesses. As with any other murder mystery, the audience is given exactly the same information to solve the crime as the detective.
Except, that is, whenever another character is killed, at which point we cut to the present day where said character's remains are being carefully examined by a team of modern archaeologists and historians who are also trying to figure out why so many of the people in this plague-pit died from blunt force trauma.
The archaeologists and historians, btw, are real experts who haven't been allowed to read the script. The filmmakers just give them a model of the victim's remains, along with some artefacts, and they have to treat it like a real case and give their real opinion on how they think this person died.
We then cut back to the past, where the constable is trying to do the same thing. Unlike the archaeologists, he doesn't have the advantage of modern tech and medical knowledge to examine the body, but he does have a more complete crime scene (since certain clues obviously wouldn't survive to be dug up in the modern day) and personal knowledge from having probably known the victim.
The audience then gets a more complete picture than either group, and an insight into both the strengths and limits of modern archaeology, explaining what we can and can't learn from studying a person's remains.
At the end of the film, after the killer is revealed and the main plot is resolved, we then get to see the archaeologists get shown the actual scenes where their 'victims' were killed, so they can see how well their conclusions match up with what 'really' happened.
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stealth-science · 1 day
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Because there fucking bastards.
i will never ever understand why ppl hate canada geese so much... theyre some of the prettiest common birds
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stealth-science · 1 day
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Tree roots following the pattern of concrete footpaths
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stealth-science · 1 day
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Tornadoes in a Bucket
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In nature, some powerful tornadoes form additional tornadoes within their shear layer. These subvortices revolve around the main tornado, causing massive destruction in their wake.  (Image and research credit: G. Di Labbio et al. 1, 2) Read the full article
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stealth-science · 2 days
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I grew up in a household where leftovers were left out overnight or in the fridge for weeks. While I lived there I NEVER got food poisoning because I was basically inoculated against it. I’m talking my family didn’t get food poisoning in Mexico when our entire group (30 people) did.
Once I went to college I started to lose this. By the time I went home for Thanksgiving Break my senior year my dad gave me food poisoning but he and my little brother were fine. Now I have to check with my mom which foods are freshest. I generally try not to eat any leftovers from before I started my visit. 
My dad denies that his methods have ever hurt anyone. I brought up the Thanksgiving incident and he looked at me with a blank face. Then said it didn’t kill you. 🤦🏻‍♀️
So anyway. I know all the food safety rules but I don’t follow them to a T at home.
25.75% food disgust.
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stealth-science · 2 days
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I need real directions. Are we agreeing/disagreeing with the statement or are we saying I would eat or not eat this food???
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stealth-science · 2 days
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i think probably magic is real.
the thing is that i was a teacher for a long time and sometimes i come back to this moment in the classroom where a 7 year old asked me are mermaids real? and i stared at her and had no idea how to answer.
for a really long time i just assumed that glow-in-the-dark paint/etc was a result of something made in a lab. i just recently found out that a specific mine in new jersey that just has rocks that do that naturally and it sent me for a loop about stuff.
because first of all - let's be honest, all of us: if there was going to be a naturally-occurring location for uv-activated glow-in-the-dark rocks? it would have to be in New Jersey. that's just the place that makes the most sense for that to happen. probably 10 thousand years ago cavemen were like. "oh this place is gonna be new jersey one day. this has new jersey energy."
the rocks only glow in the presence of uv light and are otherwise just normal rocks. in lord of the rings, there's a special sword that glows in the presence of orcs. it is magic, except that's a real thing that exists (and exists, as we have discussed, in new jersey, of all places). i guess maybe this implies orcs give off uv light.
yeah, okay. magic is just science. i know all the stuff about how ghosts are probably just caused by vibrating pipes. i knew about how there's a reason-for-all-of-this. but what do you mean that there's rocks that give you poison damage if you touch them. what do you mean that we live on the same planet as electric eels. what do you mean that a battery just, like - stores power?
and i don't know. in 20 years maybe they will find a mermaid but they will say something like well she's technically not a mermaid she's this other species, she has whiskers and not hair. and i will have to travel back in time and tell a 7 year old not technically, but there's something that is like a mermaid.
and she will look at me and think that what i am saying is science means magic isn't real and what i am actually saying is science is our word for why magic works. and then i will teach her about uv rocks, and new jersey. i will tell her to be a scientist, which is the same thing as being a wizard. there is probably a reason why sci-fi and fantasy are often grouped together. it is very lucky to be here, i think. if you squint, the improbability of it all - it does kind of feel like spellwork.
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stealth-science · 4 days
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Turn a three mile hike into a five mile hike with this one simple trick: constantly pace back and forth to look at neat rocks.
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stealth-science · 4 days
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One summer, the staff housing I was in had a door between apartments for like families or something. However, the door didn’t latch. So maintenance put a flap latch and padlock on my neighbor’s side. Great. Wonderful. EXCEPT the door doesn’t latch and the lock wasn’t tight enough to keep the door from rattling loudly every time you opened *any* door/window in either apartment. I finally got fed up with the whole thing and wedged bits of plastic hanger under the door to act as a door stop.
I was also told there was a ghost in my apartment. It turns out there was a vent in the kitchen that also would make thunking noises any time the air pressure changed, ie when the doors were open or closed.
People in my life frequently say to me "This would only happen to you, AJ," and in the platonic ideal of that phenomenon I got the following phone call yesterday:
District Ranger: Hey AJ are you moved out of the trailer yet?
Me: Mostly, I have a few things left.
District: Good, good, you need to go get the rest right now because they just tried to demolish it.
Me: ...
District: They saw your dishes in the sink. They're mad. They tore all the siding off already.
So anyway that's how I got paid to move yesterday. Good news is I'm out of a trailer that our superintendent once called "inadequate. Maybe even cruel."
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stealth-science · 4 days
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The best places to see fossils in the United States
Into fossils? Explore the USA’s diverse fossil treasures, with over 320 dinosaur species across the country.
https://gizmodo.com.au/2023/12/the-best-places-to-see-fossils-in-the-united-states/
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stealth-science · 11 days
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raycodesign.com
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stealth-science · 12 days
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stealth-science · 12 days
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Lost Dutchman State Park. Apache Junction, Arizona
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stealth-science · 12 days
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5 Myths About Becoming an Astronaut
Editor’s Note: This post was updated on March 15, 2024, to reflect new URLs and updated qualifications for applicants.
Have you ever wondered if you have what it takes to become a NASA astronaut? The term “astronaut” derives from the Greek word meaning “star sailor.”
We’re looking for a new class of astronauts to join the NASA team, and if you’re thinking about applying, there are a few things you should know.
Here are a few myths about becoming an astronaut:
MYTH: All astronauts have piloting experience.
FACT: You don’t need to be a pilot to be an astronaut. Flying experience is not a requirement, but it could be beneficial to have.
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MYTH: All astronauts have perfect vision.
FACT: It’s OK if you don’t have 20/20 vision. As of September 2007, corrective surgical procedures of the eye (PRK and LASIK), are now allowed, providing at least one year has passed since the date of the procedure with no permanent adverse aftereffects.
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MYTH: All astronauts have advanced degrees, like a PhD.
FACT: While a master’s degree from an accredited university is typically necessary to become an astronaut, an exception exists if you have completed a medical degree or test pilot school.
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MYTH: Astronauts are required to have military experience to be selected.
FACT: Military experience is not required to become an astronaut.
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MYTH: You must be a certain age to be an astronaut. 
FACT: There are no age restrictions. Astronaut candidates selected in the past have ranged between the ages of 26 and 46, with the average age being 34.
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OK, but what are the requirements?
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Basic Qualification Requirements
Applicants must meet the following minimum requirements before submitting an application:
Be a U.S. citizen.
Have completed a master’s degree (or foreign equivalent) in an accredited college or university with major study in an appropriate technical field of engineering, biological science, physical science, computer science, or mathematics.
The master’s degree requirement can also be met by having:
Completed at least two years (36 semester hours or 54 quarter hours) in an accredited PhD or related doctoral degree program (or foreign equivalent) with major study in an appropriate technical field of engineering, biological science, physical science, computer science, or mathematics.
Completed a Doctor of Medicine, Doctor of Osteopathic Medicine, or related medical degree (or foreign equivalent) in an accredited college or university.
Completed or be currently enrolled in a Test Pilot School (TPS) program (nationally or internationally recognized) and will have completed this program by June 2025. (Must submit proof of completion or enrollment.)
If TPS is your only advanced technical degree, you must have also completed a bachelor’s degree or higher (or foreign equivalent) at an accredited college or university with major study in an appropriate technical field of engineering, biological science, physical science, computer science, or mathematics.
Have at least three years of related professional experience obtained after degree completion (or 1,000 Pilot-in-Command hours with at least 850 of those hours in high-performance jet aircraft for pilots). For medical doctors, time in residency can count toward experience and must be completed by June 2025.
Be able to pass the NASA long-duration flight astronaut physical.
Applications for our next astronaut class are open through April 2! Learn more about our Astronaut Selection Program and check out current NASA astronaut Anne McClain’s advice in “An Astronaut’s Guide to Applying to Be an Astronaut.”
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