A neutron walks into a bar and asks the bartender, “How much for a drink?” The bartender says, “For you, no charge.”

@ScienceAsylum

Ай бұрын

😆 Funny every time.

@diegofernandez4789

Ай бұрын

Hurry up before you become a proton!

@aressilverfox

Ай бұрын

Oh no, you just started a chaim reaction... The bartender says, "We don't serve faster than light particles in here." A tachyon walks into a bar

@DrinkingStar

Ай бұрын

Love this joke.

@BenjaminCronce

Ай бұрын

meh, I'm neutral

“Not only do stars have to die to create elements, they have to die twice.” - Kurzgesagt

@ScienceAsylum

Ай бұрын

That's some good writing they did there.

@ingerasulffs

Ай бұрын

I heard that in my mind with the Kurzgesagt voice.

@Oldclunker-ge5zp

Ай бұрын

@ScienceAsylum: How come that all the well conducting metals (silver copper aluminium gold ) have an odd number of protons/electrons, and therefore are less abundant than others? As an EE, I therefore feel discriminated...

@Philip-hv2kc

Ай бұрын

​@@Oldclunker-ge5zp I think aluminium is fairly abundant. In top ten I believe.

@usurpvision

29 күн бұрын

@@Oldclunker-ge5zp If I were to guess, it's because the property of spin that electrons have. Atoms prefer to have their electrons in spin-pairs. When electron spins are paired up, the atom becomes much more stable meaning there's less incentive for the electrons to dissociate from the core nucleus, making the atom less conductive, but this this stability also means that that atoms are more likely to "settle down" towards energies with more stable spin states. The consequence of this would be that you have a lower abundance of elements who are happy with giving up their electrons, as those elements would naturally be less stable during formation. If there are any graduates in the comments dealing with either quantum or nuclear physics, please correct any and all of my inaccuracies. Thanks!

I’m a silversmith, sometimes I take a minute to appreciate that the silver I’m using came from the merger of neutron stars. It’s pretty awesome.

@shimrrashai-rc8fq

Ай бұрын

I remember when that the first real evidence was found for the creation of such elements in mergers that there was a sort of joke made that the explosions that result - now known as _kilonovae_ - should be called "blingnovae" :) (The other term is because it's about 1000 times brighter than a nova, but not quite as bright as a supernova.)

@rfichokeofdestiny

Ай бұрын

It's even more amazing to me that it all ended up in discrete chunks in the Earth's crust.

@bradpalmer6549

Ай бұрын

RV guy u​@@shimrrashai-rc8fq

@IroAppe

Ай бұрын

@@rfichokeofdestinyYes, that takes some thorough mixing for a long time, before it clumps together into a planet like Earth. Like a dough, you put in all the ingredients in big chunks, but the mixing dillutes all the ingredients, so that they are roughly the same amount present at each location in the dough. I also wonder how nebulae can stay nebulae for so long to mix everything through, before gravity finally makes stars and planets out of it.

@mmicoski

Ай бұрын

The silversmith using neutron stars merger as the source of his material remembers me of Mjölnir

The important thing for my own understanding is that the heavier the elements, the more spectacular and mind-blowing the origin.

@ScienceAsylum

Ай бұрын

Indeed! It got weirder as we went down on the chart.

@aressilverfox

Ай бұрын

Even weirder if you think about neutron stars, just 1 neutron before collapse into a black hole... The one with lower angular momentum wins. ^^

@loupax

Ай бұрын

I like imagining scenarios where we find elements we consider artificial floating around in space.

@steefant

Ай бұрын

i wouldnt call the big bang mundane though :)

@yuseifudo5830

Ай бұрын

@@ScienceAsylumMay I ask whether the physicists wonder what seems to be the reason why Tc is left out from all of the neutron capture processes ever happened in the past? Thank you for your video, it answered many of my concerns perfectly.

So 62% of me is 13.7 billion years old, can I start collecting social security now?

@cdprince768

Ай бұрын

They raised the eligibility age to 13.8 billion years, so you're getting close.

@rustyshackelford1413

Ай бұрын

They raised the eligibility to 63%, so you're shit out of luck.

@michaelmccoy1794

Ай бұрын

​@@rustyshackelford1413 shut up, Dale ...😂

@jimjimmy3131

Ай бұрын

Some say its twice that now. Hm . It will be a loooong wait either way huh ? ​@cdprince768

@DMZZ_DZDM

Ай бұрын

If you count fundamental particles, over 99% of you is 13.8 billion years old

I wish my wife would let me talk science at her for 20 minutes.

@_John_P

Ай бұрын

She would if you were Tom Cruise, Brad Pitt or Johnny Depp.

@Speed001

Ай бұрын

​​@@_John_Pok Johnny Pped

@donwald3436

Ай бұрын

I wish my wife existed.

@michaelmcdoesntexist1459

Ай бұрын

Tell her is about

@50PullUps

Ай бұрын

I wish I had a wife.

Worth adding that stuff like Technetium is actually made in supernovae, but its half life is so short it never makes it to Earth. So while we never see it in nature, and thus all of it we've ever had is made in a lab, it is a thing nature makes.

@AkukAkuku

Ай бұрын

Thanks! I was waiting for them to mention that element. 😅

@markevans2294

Ай бұрын

These include the likes of Astatine and Francium which have no stable or long half life isotopes.

1:43 to be precise, temperature were high enough to produce heavier elements, but it dropped to colder temeperature in orders of seconds therefore only hydrogen, helium, litium and their isotopes could be created (maybe some boron, but I don't quite remember). Another reason is because there is actually a barrier in the fusion at beryllium-8 (and helium-5 btw) which is unstable (t~=10^(-8) s). Only in the stellar cores this element can be produced, and used for fusion, because cores are hot and stable for a long period of time (millions of terrestrial years instead of a couple hundred of seconds)

@davidcroft95

Ай бұрын

sorry to be pedantic (again) but at 13:05 is a common misconception: the "r" originally meant "residuals" because there were some element that can't be explained with s-process (which again don't stand for slow, but I quite can't remember) that happened in the neutron spallations during supernovae

@ScienceAsylum

Ай бұрын

I appreciate the pedanticism. Please continue 👍

@davidcroft95

Ай бұрын

@@ScienceAsylum ahah thanks but that's all. The video is perfect as alwasys, I just wanted to add some little known facts that only "expert in the field" know (and they are barely mentioned during lessons...)

Love seeing the both of you working together keep it up. Hello from Newcastle Australia

@thisguy00

Ай бұрын

Hello from the central coast!

@tonymax6632

Ай бұрын

BNE 🇦🇺

@stufromoz8164

Ай бұрын

Cheers from Melbourne

@Tonyface666

Ай бұрын

Hello from another New South Welsh Novocastrian!

@kariduanimations

Ай бұрын

Hemlo from NSW 🇦🇺

great news! You are the first to tell me how heavy elements were really formed! Thanx.

@ScienceAsylum

Ай бұрын

Glad to help!

@ceoofgg553

Ай бұрын

+1 !! Exactly!

Not all hydrogen was created during the big bang as proton emission does create new hydrogen when the proton captures an electron.

@studibakre

Ай бұрын

Exactly And we still also see pair production, and it's feasible for a proton to escape and an older particle annihilate with the negatron

@ScubaDaveGSXR

27 күн бұрын

Isn’t a proton all by itself technically already hydrogen, albeit in it’s ion form?

@DOGMA1138

27 күн бұрын

​@@ScubaDaveGSXR Yes and no, most proton emissions end up with the proton being absorbed into another nucleus so it doesn't technically creates hydrogen, at least not for the long term. Overall about three quarters of all hydrogen and about a quarter of all helium was created during the condensation period (the first couple of minutes after the big bang) the rest was created by various other reactions primarily once stelar fusion kicked in.

@spacemanmat

10 күн бұрын

Neutron emission can also result in hydrogen being created. Also alpha radiation is just a helium being created.

@wesleyscott5637

3 күн бұрын

Where do you think the emitted proton was originally formed?

Small correction at 8:05: New hydrogen atoms can be formed from the decay of free neutrons.

@iamjimgroth

Ай бұрын

How common is it?

@liam3284

Ай бұрын

Those neutrons thrown out by nuetron stars, if they don't hit something, decay into hydrogen.

@PeterBaumgart1a

Ай бұрын

​​@@liam3284in something like 10 minutes or so, on average

@classica1fungus

Ай бұрын

Well yeah duhhh that's common sense (Jk)

@docteurlowbat

Ай бұрын

There is also proton and double proton emission !

Given that beryllium is made by cosmic rays, it seems amazing that somehow the beryllium gets concentrated enough on Earth for ores of it to be mined.

@BronzeDragon133

Ай бұрын

If memory serves, cosmic rays can strike oxygen and nitrogen atoms in Earth's atmosphere, causing spallation into lithium, beryllium, and boron, which then falls to Earth and can concentrate (via water sources) into ores. Over billions of years of these things, you get places like Boron, California (home of the world's largest borax mine!), where the boron concentrated and can be mined.

@OrdenJust

Ай бұрын

@@BronzeDragon133 Interesting. So, is the concentrating of beryllium basically its tendency to form crystals?

@michaeldeal4846

Ай бұрын

@@BronzeDragon133 I was hoping that ScienceAsylum guy was going to talk about such things (how the different atoms get incorporated into earth), such as you mentioned for boron. Maybe he will in a future video.

@BronzeDragon133

Ай бұрын

@@OrdenJust Pegmatites--look those up. When beryllium levels are higher yes, they tend to get concentrated even more by the tendency to form crystalline structures in the magma. Pegmatite has a high water content, which allows the beryllium to concentrate.

@BronzeDragon133

Ай бұрын

@@michaeldeal4846 I hope so. Stellar nucleosynthesis and f- and s-process neutron loading are the ways these happen, but even outside of "stellar" processes, like Earth's atmosphere, this still can happen. Sure, the oxygen and nitrogen was formed by star-stuff, and the cosmic ray by more star-stuff...but this, and then the processes that concentrate it into usable ores, are planetary.

Every time the kilonova event of 2017 is mentioned, I stop to appreciate the sheer freaking coolness of it. Someone must have been having a moment of pure awe... "Remember that gravitational wave detection on August 17th? Well guess what, the gamma ray observatories caught it too, that one was actually visible, it was BRIGHT" Also still can't get past the image of two neutron stars colliding and bursting into massive amounts of GOLD

@ohasis8331

Ай бұрын

There's probably quite a lot of it on earth, or rather in earth. Most of those heavier elements would have sunk towards or into the core in the early stages of the planet. If we ever manage to get down that far, there's going to be a lot of broke commodity traders.

@markstyles1246

Ай бұрын

It may be that it's nearing 3am but now I want a cartoon of Mario punching a kilonova like a cosmic brick.

@whirledpeaz5758

Ай бұрын

@@ohasis8331 I think mining of asteroid 16 Psyche will be an easier engineering feat.

Dude, you need to include your favorite Stardust in more content. She's a natural and brilliant

Me: Oh, a Science Asylum video just dropped. Imma watch it as soon as I can. Then me: OMG it's a conversation with M, that means it is not good, it'll be absolutely fantastic. Truly those videos are all in your top 10.

@ScienceAsylum

Ай бұрын

They almost always perform better than my regular videos.

@saphcal

Ай бұрын

@@ScienceAsylum she works as a good audience intermediary i think for people who might sometimes struggle with what you say. shes really good at breaking stuff you say down into more easy to understand stuff for the layman i think. also youre just adorable together which helps!

@33Bardo

Ай бұрын

I always like these conversation videos, a good change of pace.

I love the comparison with biology! That is my favourite way of learning!

The 'Wamp' sound when those atoms collide is so satisfying.

@alexbranton426

Ай бұрын

I’d buy it as a text tone

@taploko

Ай бұрын

I want a 1 hour version of the womp

@orionred2489

Ай бұрын

they use that same sound at the checkouts at Aldi.

You guys have some very wholesome chemistry, but the thing that's stuck in my mind is that the Hydrogen in our bodies is as old as the universe. That's just so badass.

@johnjameson6751

Ай бұрын

It is cool, but also a little bit misleading, as the protons in the hydrogen atoms have not all been in hydrogen atoms for the entire history of the universe. Some will have spent time in larger nuclei by fusion, then returned to hydrogen via fission.

I like this format.

@ScienceAsylum

Ай бұрын

It's very popular. Makes me glad I tried it on a whim several years ago.

@nowster

Ай бұрын

Blame Socrates. 😜

"We're all made of stardust... with extra steps" Just doesn't sound as cool 😉

@ScienceAsylum

Ай бұрын

Yeah, nuance ruining everything again 😉

@7lllll

Ай бұрын

except for the hydrogen

@tyrantworm7392

Ай бұрын

@@ScienceAsylum ""We're all stardust," but that's not actually true" In the end we are, however we nuance it. Are these always this clickbaity?

Excellent video, Nick, and thank you for clarifying the idea around binding energy. Also, I really like when you have Emily co-host your topics. Emily adds a lot of value in clarification, acting as a sounding board, and, in general, co-hosting the program. Well done as always!

I wouldn't mind seeing Em teaching nick something

Science Asylum uploads - I click. Been a huge fan for years, thanks Nick

For me a retired 75-year-old electrical engineer, I found this to be an extremely interesting video especially the outcome of neutron stars merging causing the higher elements I am so astounded thank you so much for this presentation. Very best regards.

@ScienceAsylum

Ай бұрын

Glad you enjoyed it! That means a lot.

I do have two pedantic issues with what you said in the video. 1. It wasn't just protons produced in the Big Bang, but also neutrons. I thought I read that most of the helium produced there was from those neutrons, rather than from the hydrogen to deuterium fusion channel. 2. My understanding is that most of the nitrogen in the universe comes from normal stellar nucleosynthesis in stars more massive than the sun through the CNO fusion cycle. I don't recall you covering it on this channel, so I suppose I can appreciate not mentioning it here. For anyone reading the comments and not familiar, most fusion energy in large stars comes from that CNO cycle. It starts with a carbon-12 nucleus in a star which captures 4 hydrogen atoms in succession, with enough time for radioactive decay to convert two of the protons into neutrons. When the last hydrogen is captured to form oxygen-16, it almost always immediately fissions into helium-4 and carbon-12, and the cycle starts again. While this does seem more complicated and involved than pure hydrogen fusion, it does end up being faster overall. As long is the star is big enough, as it takes a higher temperature to happen than pure hydrogen fusion.

@davidcroft95

Ай бұрын

1) yes, and it's actually a very important parameter for Big Bang nucleosynthetis and abundancies in the universe! 2) yes and no: nitrogen is produced during the carbon/oxygen burning in the core (and eventually in burning shell). During CNO cycle theoretically should be formed none as C, O and N (and in hotter star even flourine) are used as catalysts. However, since the reaction that involves (one of the isotopes of) nitrogen has the slowest rate of the chain, it accumulates waiting for the reaction therefore most of carbon and oxygen is "transformed" in nitrogen. Hope this helped :)

@journeymantraveller3338

Ай бұрын

You might add: Within a nucleus, the beta decay process can change a proton to a neutron.

Excellent presentation - i was in the group that believed every element up to Fe were made by stellar nuclear fusion (with H and He being forged at the big bang). Elements heavier than Fe up to U were made in supernova events. Always good to learn new things and revise my thinking. Cheers

@ScienceAsylum

Ай бұрын

Glad I could add a little nuance into your life 🤓

@edus9636

Ай бұрын

Until the recent (!) and elegant explanation of neutrons decaying into protons and thus creating new elements, everybody has been a victim of the fairy tale that all heavy elements had been created in supernova events. Even with billions of years in between, I can't imagine that collisions of neutron stars (not to mention black holes!) are little more than improbable, not in an expanding universe.

This makes for a great video to show in a high school chemistry class toward the end of the school year. It answers the question that almost never crosses one's mind about how did these atoms come about. I find it fascinating. Thanks.

That was new, up till now I too thought everything came from stars. Thx for enlighten me!

@ScienceAsylum

Ай бұрын

Happy to enlighten!

"I feel so old all of a sudden." You and me both... Remember back at the big bang, when our hydrogen atoms were first created though? Gods, I was strong back then.

@ScienceAsylum

Ай бұрын

😆

Thanks for having Emily! Her questions and comments were very useful.

I absolutely love this double act! Cheers for the upload!

I.ve been a subscriber for a number of years now and find your presentation informative and enjoyable. Bear in mind that I've been teaching physics and mathematics for the last 35 years and think that you're doing a great job imparting knowledge. Keep up the good work.👍👏

So not just stardust, but a whole melange of starstuff, having gone through various treatments

@declanquigg6343

Ай бұрын

There is a word that I don't use enough. Melange. Going to try and slip it into conversation tomorrow and gloat about how smart I am. 😂

@brianmessemer2973

Ай бұрын

The spice must flow...

Your video is the first video that I have seen that has incorporated this new concept of neutron star element creation. Good work.

what an entertaining and informative format, thank you, great show!

Werner Heisenberg was pulled over by a state trooper. The trooper asked him if he knew how fast he was going. Werner replied "no idea". The trooper look him dead in the eye and said 85. Werner in total disbelief responded, "Great! Now I'm lost."

@hunterchristian8372

Ай бұрын

This is the best physics joke I've ever read.

@maverickmo8976

Ай бұрын

I dont get it.....sadly

@maverickmo8976

Ай бұрын

​​@@hunterchristian8372Would you explain it for me? I dont get it.

@silvergreylion

Ай бұрын

Reminds me, back in the 80's, a highway cop once pulled over someone going like 130 mph in a Ferrari. As the officer approaches, the guy rolls down the window, and the officer asks "Hi, who do you think you are; Niki Lauda?", the guy says "uh, yes", and hands him his drivers license. Turned out it actually was Niki Lauda, the famous racecar driver. They have a long talk about racing, and ends up with the cop telling him to take it a bit slower, and letting him off with a warning.

@JimmieBrown-sg8fq

Ай бұрын

Heisenbergs Uncertainty you can't know both momentum and location exactly, joke speed 85 no way to know exact location. Basic QM stuff little more to it than that but that's the punchline for the joke

Hey Nick. I absolutely LOVE your physics content. I especially like when you're explaining to M, who then turns around and gives a very thoughtful and smart non-Physics standpoint. Keep it up.

Crazies Nick and Em have such chemistry on screen!

great explanation and good dialog style video. Keep them coming :)

Fascinating and very enjoyable. A Gold Star to you both (one each, that is!) .

Really nice video. As usual, a nit to pick. Binding energy isn't like activation energy. Binding energy is the energy liberated after the reaction is done. Lithium, beryllium, and boron have lower binding energy than helium, so when you get enough energy to make them you also have enough energy to break them apart into helium et al.

Guys, I love this couple already. I've been looking for an interaction video between a biologist and a physicist because i think such 2 extremely different sciences come together and discussing a common topic, you'll get a lot of new perspectives and ideas! I love this so much.

Hey Nick, Ive been watching your vids for years, so I feel I've long overdue to say your vids with Em are an absolute treat, so shoutout to both of you! ❤

@ScienceAsylum

28 күн бұрын

Glad you like them! We enjoy making them, so it's nice that they're appreciated.

I love these episodes with your wife! She brings a lot of knowledge to your explanations!

Man, I LOVE your videos. Thank you!

@ScienceAsylum

Ай бұрын

Thanks for watching! 🤓

I've listened to this episode several times. I thank you for sharing your knowledge. Much love ❤

This is a great video. I knew the basic idea that the heavier elements were made in stars and supernova but this has expanded my knowledge which is always a good thing! Thank you.

Your wife is great cohost. Excellent content .

@SamtheIrishexan

27 күн бұрын

Agreed the way she asks the questions a layman like myself with basic knowledge of all this stuff would ask if i was at a lecture in my college days.

Thank you for educating us. I hope my daughters have my same appetite for science and truth.

I am so glad I found this channel! This is my favorite topic to learn about!

Many thanks for such an informative video!!! Keep up the good work!!!

I went and did the math: I am 40% around since literally the big bang. This revelation has thrown my personal place in the universe off a bit. Thank you so much. I love how you made the whole video👍🏽

Amazing video! Very comprehensive information. I was just wondering about the subject. Thank you!

Just discovered this channel. I love the format -- with an expert in this field interacting with a very smart and insightful person from another field of science! Very illuminating.

Your wife is so pleasant. Great topic and endlessly fascinating.

Always difficult finding qualified assistant death ray operators because I can't offer insurance.

@ScienceAsylum

Ай бұрын

"We're gonna need another Timmy!!"

Em is a hoot. Very entertaining video, folks. Thanks.

Love seeing 2 brilliant people talking through subjects I always wondered about with such crazy grace.❤

as always very teaching video in a fun way to watch but also very accurate

7:50 Most building blocks of life on Earth are made by nuclear fusion (except for hydrogen nuclei) but not all of them are made by stellar nucleosynthesis since nitrogen, potassium, chlorine, selenium, copper, zinc, manganese and cobalt nuclei are made by supernova nucleosynthesis, molybdenum nuclei are made by neutron capture in stars and neutron-star mergers, and iodine nuclei are made by neutron-star mergers.

You guys are really sweet together. Genuine passion, thanks for the info.

Great video. You do a wonderful job at explaining things in a matter where most people can understand. 👍

11:00 So, beryllium, lithium and boron are nuclear shrapnel, kind of?

@ScienceAsylum

Ай бұрын

Yeah, that's a perfect analogy 👍

Love this channel! ❤🎉😊

@ScienceAsylum

Ай бұрын

Glad you enjoy it! 🤓

@punditgi

Ай бұрын

I also bought the book! 😊

@declanquigg6343

Ай бұрын

Wait there's a book!!?

@punditgi

Ай бұрын

@@declanquigg6343 Yes! Advanced physics written by Lucid himself. Check his web site. This is 😃

@ScienceAsylum

Ай бұрын

@@declanquigg6343 Advanced Theoretical Physics (Paperback): www.lulu.com/shop/nick-lucid/advanced-theoretical-physics-a-historical-perspective/paperback/product-24250687.html Advanced Theoretical Physics (eBook): gumroad.com/l/ubSc

wow very very educational - you two made complex things understandable. thank you so much.

It is good to have two people explaining, because some questions and explanations would not come up otherwise. Thank you for this video.

@ScienceAsylum

19 күн бұрын

Yeah, that seems to be what many people are saying. When I make videos by myself, I don't always realize what details are important.

This was really interesting and educational. The next time I'm in a conversation with somebody, and they said, "Did you know all the elements around us except hydrogen and helium were made in stars?" I'm going to say, "Well, actually. . ." BTW, I love listening you and your wife talk.

I’ve watched and enjoyed your videos for years, but I enjoyed this change of pace with a more conversational style. Keep up the excellent work on your channel!

I learnt a lot from this really engaging and smart video. It's a great format.

Great vid as always !

What an excellent episode. Thank you!

@senatorjosephmccarthy2720

Ай бұрын

In the begining Yehovah Elohim created the heavens and the Earth.

You did a great job with your little duo there ... made it very interesting and easier to follow. Well done.

This video was so enlightening!! I am so grateful that you've explained the nuance of this process, I totally thought all elements were made inside stars as I constantly hear quotes from Carl Sagan or Neil DeGrasse Tyson saying "we're star dust". This just adds a whole extra layer of appreciation. I love it, also love Awkward M here!!! love u guys! ❤

Love you guys! Great video wonderful explanations

Some radioactive processes generate lone neutrons, which decay into protons, which might pick up an electron to become neutral hydrogen, right? In that case, wouldn't it be reasonable to assume that among the gazillions of hydrogens in your body, at least one of them might be a former neutron rather than having been hydrogen since the big bang?

@liam3284

Ай бұрын

but even those neutrons were once hydrogen.

This channel is what Sheldon and Amy could have been😂

I must admit that I learned something new. Really cool that Nick Lucid is giving us a heads-up with regards to recent research. Also Em Lucid is lovely and much better than any clones of Nick. You both rock! Best wishes, Erik.

Wow, wow! The interaction between you two is fantastic.

@ScienceAsylum

Ай бұрын

Thank you! 🤓 We feel pretty great about it too.

An electron gets pulled over by a cop. The cop asks the electron, "Do you know how fast you were going?" The electron says, "No..." The cop says, "10,000,000 miles per hour." The electron says, "Dammit man! Now I have no idea where I am!"

@DrDeuteron

Ай бұрын

this is an unfortunate misrepresentation of the HEP: the expectation value is totally irrelevant, all that matter is the variance,

Congrats on having 666 subscribers!

@ScienceAsylum

Ай бұрын

Thanks!

This is the most interesting podcast'esk format I have encountered yet.

I love when I actually learn something from a video and this was all new to me. Awesome!

God, I love this channel.

Star dust, big bang dust, neutron merger dust

Absolutely brilliant video - thanks a lot !!

I knew about elements being formed by merging/exploding neutron stars, but not about the neutron capture stuff. Very cool!

Good work!

@ScienceAsylum

Ай бұрын

Thanks!

@artificercreator

Ай бұрын

@@ScienceAsylum 💯

Awesome to have a partner interested in the same work. Congrats

@ScienceAsylum

Ай бұрын

I feel pretty great about it 😃

@fep_ptcp883

Ай бұрын

​@@ScienceAsylum I love your videos with her. The conversation flows very nicely and the questions we would like to ask are often her questions too. It makes things easier to understand. Top notch content, man

Great video! Really gets a very concise explanation which I really enjoyed.

@ScienceAsylum

21 күн бұрын

Glad you enjoyed it!

How enlightening you are team, with a little cherry on top. KZread has become a great gift to the humus of our little planet. Thank you!

Carl lied to us????

@ScienceAsylum

Ай бұрын

Eh. Like most popular science celebrities, he oversimplified the truth 🤷‍♂️

@TheFranchfry

Ай бұрын

@ScienceAsylum but the accusation implied was that we were led to believe something on false pretenses and have only now understood the misguided beliefs held. He lied.

@pennsworth996

Ай бұрын

I think the quote was "we are made of star stuff" which (as an aspiring pedant) is distinct from "we are all made exclusively from star stuff". A cookie can be made from flour and sugar yet still contain chocolate chips. The English language is replete with ambiguity. I'd argue his statement is still accurate...insofar as "star stuff" is a thing.

@Fizzbuzz994

Ай бұрын

Not lied just left out steps. I don't think this video really condtradicts the statement that we are made of stardust despite the title. Stardust - or at least star remnant dust ;) - is required input to those other processes, so all that stuff that isn't produced in stellar fusion is still made of stardust. Gotta admit that "We are made of star-stuff" is more quotable than "We are made of star-stuff and some other stuff that is also made of star-stuff" though. PS: I was using a non-technical understanding of the term stardust. Just tried to look up the technical definition but after 20 minutes reading I lack the context to understand it. From now on I'll just say star stuff instead. 😆

8:00 Is it strictly true that _all_ of the hydrogen in your body has been around since the Big Bang? Do individual protons never get ejected during any natural processes? I guess I've never heard of it happening. Alpha radiation are helium nuclei. Fission can toss lone neutrons. Electrons are comparatively easy to knock loose. But I've never heard of a lone proton aside from the OG stuff.

@georgelionon9050

Ай бұрын

Indeed. Beta radiation from some fusion or fission is neutrons and those decay into proton+eletron, so a few are remade into hydrogen that way.

@PMA65537

Ай бұрын

A free neutron spontaneously decays to a proton, an electron, and an antineutrino, with a mean lifetime of about 15 minutes. -- wikipedia on neutron

It's nice being able to relate different fields to eachother, also someone to point out leaps in terminology.

“Weird is usually interesting.” 😂 That seems like a nerd thing to say! 😂😂 However, I am also a nerd, so I agree. 😂😂😂

@ScienceAsylum

Ай бұрын

😂

A question for Emily: does a radioactive cat have 18 half-lives? Asking for a friend... with a cat... in a box...

Wo, I learnt so much from this video that I had no idea about how much cosmology has progressed in explaining relative abundancies. TY

Nicely done. I'm subscribing!

Whilst a good video I am a little frustrated at the absolutes used here. "These particles do NOT come from stars" is very much at odds with both what I was taught and my books on the subject. Alpha particle catalysed chains are very much a part of small star fusion and will produce many of the elements contrary to the video's suggestion. A wide range of atoms excluded will be produced in stars in fact. It seems more proper to point out a low proportion of that element comes from stars rather than to suggest it simply doesn't. Nuclear Physics is more a game of percentages than definite firm products. Another example would be the suggestion that all hydrogen atoms come from the big bang. Neutrons decay to protons all of the time, they aren't purely from the big bang. I understand the desire to stress that star fusion has very little to do with hydrogen production, but it just feels a little weird to say it in such an extremely inaccurate way. I checked Nuclear and Particle Physics, W.S.C Wells before making the comment but I'm sure most reputable scientific literature would agree. Specifically the chapter on Nuclear and Particle Astrophysics near the end if anyone needs a more in depth read at the undergrad level.

@serversurfer6169

Ай бұрын

Get newer books. 😜

@Dragrath1

Ай бұрын

Thank you for saying this the exclusion of the alpha chain ladder and the brief footnote mention of the dominant s process both were incredibly frustrating as these process while they are less likely outcomes occur in most kinds of stars of sufficient mass to reach triple alpha fusion which have much higher abundances compared to more massive stars and last far longer which means the combined results of both processes dominate the production of many of these elements by large percentages. We only briefly covered these topics in my stellar astrophysics class but even there we acknowledge the role these processes had on the formation of elements. In fact if we consider stars other than the theorized population III stars these two processes together play a huge deciding role in the evolution and fate of massive stars with the catalytic generation and destruction of Nitrogen as part of the CNO cycle forming the dominant mode of main sequence fusion.

@ScienceAsylum

Ай бұрын

There's always more nuance. I have to draw the line somewhere to fit the information I'm presenting into a digestable chunk. I like how you worded it here: "Nuclear Physics is more a game of percentages than definite firm products." Those are words to live by in nuclear physics 👍

@Dragrath1

Ай бұрын

@@ScienceAsylum I understand I probably would have barely mentioned the alpha ladder beyond saying it exists and contributes significantly for several elements its the s process which I feel needed more attention as it appears to be a major point of confusion as the occurrence in lower mass stars means there are far more sources which actually start to dominate the story for some evidence.

hi

@ScienceAsylum

Ай бұрын

👋