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askscience

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A_A OP , (edited ) in New physical cosmological model : is it coherent ?
@A_A@lemmy.ca avatar

@FelipeFelop

Agreed, this is the most on topic post we’ve had for a while.

We both think my post was on topic, unfortunately, ShowerThoughts moderators deleted it !

Generally, conservation of energy applies in a closed system, so [it] wouldn’t apply at the creation of the system.

Plus we can’t (yet) be sure what caused the Big Bang if it happened.

Nice 😊 !

I’ve always liked the idea that matter, space and time are the way we observe the interactions of fields. So gravity waves make an interesting idea as to how part of it might work

Now we need a physicist and a mathematician, which obviously, I am not.

Today , in Has there been any psych research about why some people prefer certain kinds of pets over others?

All of my hamster deaths were cat related.

I believe there was an article a few years ago regarding cat/dog people and political party.

ThisIsAManWhoKnowsHowToGling OP ,
@ThisIsAManWhoKnowsHowToGling@lemmy.dbzer0.com avatar

I suppose cat-realated deaths are better for the poor hammy than being getting stuck in the legs of Chickenleigh’s Tiny Tales^TM^ XL Dinosaur with Activity Center. Or being whipped around the room in a cage that looks like a fire truck or police car.

I swear to God anytime I see a “kid-friendly” hamster cage my blood starts to boil. I mean, the storage tub I keep my hammy in doesnt look super exciting, but it’s got lots of space for my little dude to tunnel and a huge wheel so he doesn’t get back problems. It’s really not that hard.

Ubermeisters , in Has there been any psych research about why some people prefer certain kinds of pets over others?

I remember hearing that dog people like to be looked in the eyes more often than cat people do. Idk about the reliability of this vague memory though.

FatherOfHoodoo , in What shape would the universe's equivalent of a single pixel of 3D space be?

See the other answers for why this isn’t really right, but given 4 dimensional spacetime, if that ‘pixel’ did exist, it would look like a hypercube/tessaract. A constantly stretching and twisting but approximate one, anyway.

neptune , in Can a desert turn into grassland through artificial means? How have deserts naturally turned into other forms of environments, historically?
WEAPONX , in Is it worth closing the lid on a toilet before flushing?

But how do i use the brush then, if the lid is closed? Don’t you use the brush while simultaneously flushing the toilet?

Reborn2966 ,

you don’t, most of the time is not needed. if it is, a sencond lighter flush with the brush thing will take care of everything that is still there. with a controlled flush you just let some water run.

andthenthreemore ,
@andthenthreemore@startrek.website avatar

Er, no. Because if you do that the brush just gets covered in shit.

davidgro , in After seeing the photo of a hammerhead skull today: Can someone tell me what evolutionary pressure caused it? What is the advantage of the hammerhead skull shape?

Link to post with photo?

thebestaquaman OP ,

I’m on mobile now, so a bit more effort to link, but it’s on c/mildlyinteresting

davidgro ,

Someone else got it. Thank you

bradx3 ,
ghostface , in if something happened to the black hole at the center of our galaxy, could we know about that problem before it affected us?

I can not answer this question, but I suspect, that actual answer is yes and no. Due to the swpc they relay solar storm info to earth before it hits due to sensors.

Webwoupd need yo send probes out further yo.grab that data first

count_of_monte_carlo ,

Any data is sent at or below the speed of light. Solar storms are charged particles (mostly protons) being ejected from the sun and eventually hitting the earth’s magnetic field, causing disruptions in the field (and potentially cool auroras).

Since these storms are just particles traveling from the sun to the earth, they travel slower than light speed, so our distant sensors can warn us in advance at/near the speed of light. This won’t work if the sun were to instantly disappear or change color though, that information would travel at light speed and the probe signals would arrive at the same time.

skillissuer , in Hi, can someone explain to my small brain what reaction this is or what happened?

you’re seeing elecrochemical corrosion. if you scratch aluminum in such a way that:

  • oxide layer is removed, and
  • finely divided copper is deposited, and
  • oxide layer can’t reform

you’ll see rapid corrosion of aluminum. normally, alumnium doesn’t corrode because of very tight oxide layer. here, oxide layer is removed first by scratching and this also deposits copper in electrical contact with aluminum. then, citrate can bind aluminum removing some of oxide layer, making aluminum more exposed and so more reactive. if you used gallium as heat transfer compound (sp?) then gallium will also disturb oxide layer and make corrosion of aluminum faster. copper elements are in this case actually protected from corrosion (by dissolving aluminum)

ken_cleanairsystems , in Join Our Moderator Team at c/askscience
@ken_cleanairsystems@lemmy.sdf.org avatar

Hi there. I’m interested. I’ve also got a science background (life sciences), it’s my job to communicate well, and I’ve been working remotely on a distributed team for years now, so I know how important communication and coordination are. I’d love to help foster an inclusive and informative community, and I can check Lemmy pretty frequently (multiple times a day). I’m okay using Discord. (I’m already on Slack and Telegram basically 24 hours a day, so it’d be great if that were the tool of choice, but Discord is fine, too.)

Candelestine , in Does faster than light travel violate causality? Why/Why not? How?

Explaining college level physics is outside of my pay grade, personally. Fortunately, it’s not for PBS Space Time:

youtu.be/msVuCEs8Ydo

realitista , in Have humans adopted to high / low humidity?

I don’t have the study to back this up, but personally for me it has a lot to do with how heavy I am. When I’ve been thinner I’ve been much more tolerant of humidity and heat.

jeena OP ,
@jeena@jemmy.jeena.net avatar

There might be something to it, it would much my and my fiance too, she is normal weight and I’m quite overweight.

bernieecclestoned , in Have we ever observed unique ecosystems and specific adaptations of wildlife in landfills?

Some plastic eating bacteria was found in a plastic recycling plant in Japan

www.science.org/doi/10.1126/science.aad6359

OpenStars , in At what systemic level do we start to see living beings making decisions rather than purely chemical reactions?
@OpenStars@kbin.social avatar

Quite frankly, all of them, as in literally all of the levels. e.g., viruses are not considered "alive" in the classic sense, but they sense things sometimes & change their behavior accordingly. A single protein can do it too, like in mad cow disease / scrappy (called "prions"). Even a tiny snippet of DNA can make logical circuits akin to computer ones, implementing AND, OR, XOR, NOR, operations etc., plus feed-forward loops (& feed-backwards, and all other sorts).

Possibly even subatomic particles, and maybe even quarks (or strings?) do the same - e.g. the Heisenberg Uncertainty Principle where you start to interact with something and then that changes it already so that you cannot measure other aspects of its previous "natural state". Okay that's not so much a "decision" as a "reaction" - but as you are questioning, what really distinguishes the two, REALLY?

Bacteria can sense a molecule (like sugar), literally start growing a tail (no joke!), and then swim towards it. All entirely chemically, and we have the technology to literally just kinda 3-D print all that at the molecular level (it takes an existing flagellum but once that is added to the mix, it can grow just like a crystal, by extension / copying of the old pattern).

Most of what we considered to have made humans "special" in the word turned out to be false - e.g. chimps & gorillas can "talk" (it's hard for their throats to make our kinds of sounds, but given the right apparatus they can get the job done), and think in abstract terms, and do math, and all kinds of things. Of course, humans ARE special - we are the only things on planet earth that if aliens came, could attempt to nuke them in orbit, and we literally light up the night sky! But there's a whole continuum of "dust" that share a lot of properties with us, in various ways. I'm not sure if animals have the same kind of subconscious vs. conscious interplay going on as we do, but if you have a pet and stare at it trying to work through a decision, you KNOW that it's doing the same as us, at a fundamental level. And then each time you go a level deeper, the similarities kinda never end...

Such questions may never even find answers, at least in our lifetimes, but it sure does seem worthwhile to ask anyway... it sharpens us, so keep digging!:-)

kadu , in At what systemic level do we start to see living beings making decisions rather than purely chemical reactions?
@kadu@lemmy.world avatar

Abandon the philosopical concept of an independent thinking mind capable of evaluating something by itself.

“Decisions” and “Thoughts” don’t exist without the environment, as they’re a succession of neuronal activation cascades in response to the current state of all stimulus, the previous connections formed in your brain, and reinforced patterns.

Leave a human being in an empty void and their thoughts will be built by severely boosting sensitivity and then responding to random sensory noise. Sever all sensory connections and the mind shuts down.

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