Neil deGrasse Tyson Explains Earth's Spinning Core

What’s going on with Earth’s core? Neil deGrasse Tyson and comedian Chuck Nice give an astrophysicist’s take on reports that the Earth’s core is slowing. Find out how planets are formed and what the composition of the Earth’s interior is.
Discover protoplanets and the early formation of our Earth. What does the center of the Earth look like? How do we know what it looks like? Learn about seismometers and how Earth creates its magnetic field. What is a dynamo? Plus, what happens when Earth’s magnetic field flips? Is it dangerous?
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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
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00:00 - How the Earth formed
05:50 - Earth’s Core
08:00 - How do we know what’s at the center of the Earth?
10:30 - Magnetic Field
12:29 - Earth’s Cycle & our Magnetic Dynamo

[@StarTalk]

Any lingering questions you want answered in the follow-up conversation?

[@glike2]

Doesn't the core have some kind of structural protrusion, and does that play a part in this?

[@iron0xide974]

Yes. When do I get to meet Neil deGrasse Tyson? I am inspired to study physics and have read a few books on applied physics and particle physics. And all of this fascinated me. I would like to be able to obtain some data and feed data into a model to review the results. I’m hooked on pattern recognition and I believe both theories are the same. Big and small.

[@helenedesmarais8697]

How can they identify the change in the magnetic direction in a rock sample ( not meaning of the core itself) Any rock you take would have a direction but pointed towards where was it when it formed ? Rotate the rock and you have another direction. 🤔 Update; Thank you for the numerous responses I received to clarify and dissipate a bit more ignorance from me. 🤓

[@Graupunkt]

Do there exist any other examples where this whole process occurs or is it unique to planets?

[@ericthompson3982]

Yes: What are lessons we can learn from the composition of the earth's systems that will help protect us from radiation as we travel away from the earth?

[@ericthompson3982]

Seriously, the chemistry between these two is just so freaking delightful. I love watching them together.

[@ogelsmogel]

Same here 🙂

[@ben-hv1id]

Me too

[@ben-hv1id]

I can’t imagine them ever becoming so polar. they will never be apart haha hehe hah heh hmm🙁

[@ongeziwegodlwana7674]

Mee too. I learn so much from these videos but I genuinely enjoy watching them.

[@rabbitgothops]

Their periodicity content is solid....shout out to Always!

[@Quancheese]

Some elite academic institution gotta run Chuck his honorary PhD! The amount of relevant data he holds in his head and can be quizzed on at any time! He’s earned it.

[@nitaibaboolal1929]

Same though

[@Bull1the1Great]

That should happen

[@NeoSHNIK]

He should get phd in periodicity =)

[@Shibuyach0]

Yo, you're icon's dope.

[@georgesteidell4765]

Why would you need an honorary Phd when you already have the real one? Lol.

[@suremaine]

I love when Chuck starts to piece things together. You see his eyes light up and then Neil is like, "you're picking up what I'm putting down!" Which in turn gets Neil hyped to keep explaining. It's so cool.

[@rianmacdonald9454]

Hat off to them - they make a good duo. I love the dynamic of the show and the format - teacher/student but more of friends talking sharing knowledge. Lot of respect for the two of them for doing this show.

[@marceldupont4032]

You do know Chuck is an Actor . Eh .lol

[@stewartbonner]

I jump ahead when he starts yelling into the mic.

[@Navaura]

He makes science so interesting and easy to understand

[@MICHAEL-vy3ch]

It is comforting to know that this cycle has happened successfully many times without a mass extinction.

[@perrystuart8035]

Because it doesnt happen lol. There is literally zero evidence of a "core". Thr furthest anything has been into earth is 8 miles. The rest is pure speculation.

[@MICHAEL-vy3ch]

@@perrystuart8035 There is ample scientific evidence of a core. You don't actually have to go to it to know it's there.

[@perrystuart8035]

@@MICHAEL-vy3ch Its fine, there are many religious people out there with their beliefs.

[@EeLyos]

@@perrystuart8035 cope

[@EeLyos]

@@perrystuart8035 religion and science aren’t best friends most of the time, except for Islam. Do research on the signs of the end of times, islamic eschatology is so morbidly accurate it’s shocking.

[@jordanschoepke1864]

I absolutely love it every time Chuck comes to an epiphany about something Neil says and shows just how truly excited he is to learn this stuff

[@toby9999]

You mean ridiculous ideas like burrowing to the centre of the earth?

[@Amalgamotion]

Periodicity! worth the whole vid! Chuck and Neil are a great combo. love this channel

[@lorenzoblum868]

Take that Dante 😅

[@myaccount__7269]

He’s just acting. He knows most of what Neil knows throughout the years but plays coy for the camera. He is great though

[@theresabass685]

You two guys broke this down so anyone can understand the slowing of Earths Core. Love this pod cast video.❤

[@guidonabben7496]

I love how chuck has learned so much physics, just from conversing with Neil!

[@berthageorge2627]

🤭

[@rogergeyer9851]

I remember when I was a kid and my dad remarked that we are just like bugs on the skin of some hot soup, re the earth NOT being solid, though we think of it that way. But the ground being "solid" is so built into our daily experience that it seems automatic -- until you're suddenly in your first earthquake and your house's walls are shaking VERY loudly and it's suddenly very scary. Then it's much easier to remember the earth isn't at all "solid", overall. It's always fascinating to hear Neal explain things. I just LOVE the story re Faraday saying, "I don't know how it will be practical YET, but some day you will TAX it!". What a way to win some government funding for an idea you want to research.

[@carlfrye1566]

The earths crust - surface - is solid, that's why we can build very very heavy structures on it. Are you one of those...."our world is a grain of sand on a beach somewhere in the universe" folks?

[@Damaged262]

Love these gentlemen. Feeding the mind is just as important as feeding the body.

[@lordmaster2562]

Feeding it everyday with docs and fitness 3 times a week and walk everyday 10.000 steps

[@StaticBlaster]

Yes I agree. I feed my mind every day with knowledge which I acquire from reading books.

[@mightyconker3903]

How about you guys do real observations. Science isn't hard to do. These guys like in the video are all clowns. Just go to the sea and watch the sun as it goes, look at the shape of the reflection. Keep in mind visual perspective laws, and then study the reflection that a point source light makes on a sphere. You can do better if you know someone with a boat. Get them to go out until you see them "going over the horizon" and tell them to stop, then take a telescope or a high zoom camera, and zoom right back in on that boat as it reappears due to increased angular resolution as the visual perspective matrix is widened. Even an amateur can make hard hitting obsevations that trash the lying mainstream psuedology

[@michaeltyler4034]

If more science teachers and classes had such entertaining and interactive instructors and lectures as these that Neil and Chuck provide, we’d have far more kids choosing science and STEM career paths.

[@erinmac4750]

Truth! I think that's why I like science. Most of my teachers in those classes were knowledgeable and excited about learning, and even the one who had issues communicating was nothing if not entertaining...memorial scorches in the ceiling for interesting experiments. 🍀✌️😎

[@amz_news]

Sadly the American child prefers to be a KZbinr than a scientist. Reason i think China will lead the world. Their system have deeply accepted science . Even children at a very early age.

[@rianmacdonald9454]

If it were my country, I would definitely be asking Neil to help with a science curriculum. Amoung a few others.

[@Jihad__]

tradesmen here! (electrician) and this is great stuff, not just for stem 🙂

[@tommyandrews4992]

I could listen to Neil for hours without being bored! As a matter of fact, I watch him 2 hours a day after work for the last 10 years

[@gwenmarcus3389]

I love everything about this series of videos. Thank you, Niel, for not talking down to us. Thank you, Chuck, for your comic relief and for asking leading questions. You are a well matched pair of hosts.

[@jeanadams1667]

When my son was 5 years old, he brought home the fish he had caught and put it in a tub of water. He named the fish Hernald. I asked him, "Do you mean Arnold?" "No", he said "Hernold". "Wait. Do you mean Harold?" "NO! Hernold! " The fish named Harold reminded me of this 50+ year old story. I love Star Talk.

[@StarTalk]

Love this story!

[@armadilloross]

“Periodicity” that whole convo had me dead and I am going to now find any and every reason to use it. 🤣😂👏🏻

[@deveshkumar6624]

This is the most underrated youtube channel. It so good, everybody should watch it. Not only is this educational, it is also very entertaining.

[@ElMrBlack]

> underrated it has over 2 million subs...

[@berthageorge2627]

🤭🖐️

[@QmVuamFtaW4]

well it is very entertaining and educational but i wouldnt say underrated.

[@jlnrys6010]

Thank you so much for this. Explainer videos do really need some graphics especially for someone like me who can't sometimes comprehend or imagine what they are talking about lol

[@josemarcelino3721]

This is one of those episodes you just don't want them to end.. definitely need a whole episode on this

[@savagepro9060]

Wow! Just clicked on Sabine Hossenfelder's take on the spinning core, and boom, this notification from Neil! KZbin's Inner Core is certainly spinning!

[@Dustywitch]

God, I wish I could take a semester class from the good doctor. He always amazes me with science.

[@brucewelty7684]

Then you would be astounded by Nye!

[@thedarcbird]

"He Blinded Me With Science"?

[@harrietharlow9929]

That woud be very cool.

[@andrewpestotnik5495]

@@brucewelty7684 Before he caved to liberal bs over gender. It's really sad

[@whogivesacrapaboutastupidc2313]

What? Are you missing some data? Tyson is a shill - he's not honest. If he says something scientifically accurate, it's only because he hasn't been paid to say otherwise...yet.

[@mininahid3300]

Thanks for making this one. I was really interested on this topic.

[@Veronique487]

genius is when you can explain complex things in simple terms. Then add Chuck's humor tidbits and it's maahhhvelous!👍keep it up guys!

[@mightyconker3903]

Genius is when you can see without being told. Gifted is when you can see after being told. Normal is not being able to see. Everything these guys say is a lie.

[@MegaSkills9]

@@mightyconker3903- Sounds like you are in denial. Neil happens to have an IQ of Genius. So do I as well. Don't bad mouth Science just because you doubt information from an expert. Other people are trying to learn.

[@MegaSkills9]

@@Veronique487 - Exactly !

[@Juno_Eh]

I love seeing how excited Chuck gets now that he is understanding more!

[@mightyconker3903]

Excited from fantasising is a usual thing... True understanding takes you through the shadow of death.

[@dd-1993]

Hey Neil, just wanna say this is insanely insightful yet mind-blowing!! Thank you for explaining in full context!

[@Ariel_Waters]

I love the "Harold" back and forth. And your back and forth in general. You two make these concepts seem so simple (although, Carl Sagan's book helped me with Farraday first lol)

[@rogergeyer9851]

Ariel Waters: To me, Neil has done a wonderful job take up the mantle that Carl Sagan left, re being the voice of communicating so much science (including astronomy) to the masses.

[@Ariel_Waters]

@@rogergeyer9851 I see that!

[@willie417]

Neil and Chuck match up nice on this show, their timing is great

[@Competitive_Antagonist]

That's why he's called Chuck Nice.

[@willie417]

@@Competitive_Antagonist 🤔🤨😏😂🤣😂

[@SoerenBruunJensen]

You forgot at all to mention the Danish scientist Inge Lehmann, who discovered that the Earth' s core consists of three parts: Crust, fluid mantle and a solid core. Using pencil and paper in 1936. She was headhuntet after WWII by US to help interpret seismic waves to monitor USSR underground nuclear tests, at an age of 63!! Thats how good she was....

[@hernanialves6938]

I didn't know her, thanks for that.

[@SoerenBruunJensen]

@@hernanialves6938 Her history is also filled with a ton of headwind she had in Denmark just because of the fact she was a woman. From among others Niels Bohr. While she was respected amongst her pears all over the World.

[@StarBoundFables]

This was awesome, cheers! Watched this right after checking out Neil's MasterClass video on stoking an audience's curiosity. In the class video, he talks about the shape of the Earth & how that occurred due to its rotation

[@nabilzein435]

Mr. Neil, i love the way you explain serious scientific subjects.

[@gangoffour6690]

Tyson has lost all credibly to me for various reasons.

[@Kismile.Farms.Uganda]

Neil remind me of my high school physic teacher. I am a veterinary Dr. Some of my professors made hate academic field. Listening to Neil make me want to upgrade and become a research scientist because it's actually okay to be a professor, down to earth and cool at the same time. Following closely from Africa

[@BLewTheKake]

Sheep! The earth is flat

[@sungdrip-woo321]

It's great watching Chuck learn over all this time

[@DeviantDiscoveries]

Absolutely LOVING the visual inserts ❤

[@Impeeza]

Hope Neil deGrasse knows how all us value and love his work to make all of us interested on science. THANKS A LOT.

[@jonathanpatry]

I'm curious as to why all the major news outlet are saying that the core stopped, and not simply slowing. I heard about it last week and when I saw this episode I ran a quick google search and it's all over. Hoping to see your full show soon!

[@aaronusher3097]

Fear mongering.. like they do with everything especially Covid 19

[@billweir1745]

Same reason they push stories about poisoned or tampered with candy at Halloween every year (even though it's never actually happened). People stop watching unless it keeps you at the edge of your seat.

[@Chris-hx3om]

It's called sensationalism. It's more 'clicky' to say it's stop, and scare people more. News/internet is the worst.

[@paperboy...8667]

It's total bs

[@raystanczak4277]

A major reason is that science is complex and difficult, and scientific research is interpreted for laymen by other (mostly) laymen. Since they can’t get very technical, they instead rely on excitement, drama, and catastrophe. Otherwise people won’t read it. It’s a problem science had, has now, and will always have. Unless everyone becomes smart. 😎

[@kendebusk2540]

There are a few science shows which *TRY* to insert comedy and fail in a spectacular manner. You are the exception--I love the humorous interplay on this channel and look forward to it!

[@mightyconker3903]

This isn't science. None of it is based on observation. This is psuedo science based purely on theory.

[@kendebusk2540]

@@mightyconker3903 A rookie mistake is to insert the word "theory" when you actually mean "hypothesis". A theory is settled fact subject to further observations. Hypothesis is merely a guess based on some observations. Law is a theory which can be expressed in numbers.

[@tedwilliams3682]

This is easily my favorite channel. I love it when Mr deGrasse does explainers as its a great way to form new neuron pathways. Not to mention I love the humour involved

[@AceSpadeThePikachu]

I love how Chuck immediately started referencing the movie "The Core." It may have been a dumb schlocky popcorn flick but it's a guilty pleasure of mine.

[@richarddow8967]

I will never hear the word periodicity the same- thanks Chuck!!

[@nabiljemel2838]

Thank you guys for the amazing series

[@user-lr4dj8fs6e]

I love this man. I wanted to hear about and better understand the earth"s core. Everything I found (KZbin searches) was "fluff"; either trying to entertain, scare or impress me. While I don't agree with everything he says on some things; he never fails to inform me. I always seem to walk away wanting to know more. This is why I love this man.

[@peterdarr383]

I'm trying to see if the Solar Wind pushes on the Van Allen belts, which are generated by the churning liquid iron core, and the LEVERAGE these high-speed particles would have, as they are deflected to the magnetic poles. Mass X inertia X Distance, etc. Meanwhile the Earth is spinning at 1,100 MPH at the Equator and the top of the magnetic field is 25,000 miles up plus the 7,700 mile radius of Earth. I'm thinking the force exerted on the liquid core could get transmitted to the solid core.

[@harrietharlow9929]

I love watching anything with Dr. Tyson in it.

[@MPlain]

oh when i search youtube i find fluff alright. very very distracting fluff.

[@rogergeyer9851]

@@peterdarr383: One thing I've learned by several decades of personal experience and watching science evolve (often very contrary to perceived wisdom of scientists at the time) -- intuition is VERY OFTEN proved VERY wrong by science. (Example: How different the atmospheres of our planets and large moons are, re scientific data, vs. what astronomers studying our solar system believed they would be before our various NASA probes gathered the data to actually find out). I have no idea re the answer to your very interesting question / idea about that force, but my guess is that it's a complex answer which may well involve a variety of forces, substances (like the atmosphere), etc.

[@user-lr4dj8fs6e]

@@peterdarr383 Your question is so outta my league...I do hope you find the answers you seek 🙂

[@adventuresofbobandlana4939]

You two are the craziest smart people I have ever seen. Love the way you have fun learning and teaching!

[@waynemasters8673]

So smart they use wide angle lenses on their faces .

[@charlestredway8253]

Thank you for that explanation and keep Chuck on your show!!!

[@tickets23]

Harrold tried to walk on land at the wrong time!! Hahaha love this video! Thank you! Look forward to the whole show

[@Peace4All09]

Periodicity, great word! I Thank You Both, while others are partying, watching tv & zone out with distractions, i am having Tea with Knowledge, love it. Bring on the Geophysicist, i look forward to that 🤩 Peace

[@wafflebayrescue]

this was amazing! love these videos. your explanations are so clear and concise! i loved it thank you.

[@aikens1987]

Glad this video was made I just read an article on this recently and asked on a prior video if they was going to cover this

[@MaryAnnNytowl]

Yes, please, I WILL want a full geologist explanation, thank you!

[@bluegold21]

I'm an amatuer geologist so fact check advised. But the core isn't actually slowing. It's elctric charge is reversing polarity. The outer core is in flux so that at any given point in the outer core is either slowing or speeding up; like eddies in fluid, but the average speed is the same. And it's not fast. It's only a few meters per year compared to the mantel and solid inner core. However, this flux effect is to change the polarity of the magnetosphere. In the next 1000+or-yrs the red end of a compass needle will start pointing south. The problem with this is that during the change the magnetosphere will be severely weakened allowing fo more cosmic radiation to reach the Earths surface.

[@AndreyMikhaylovlolmaus]

See my top level comment starting with "Dr Tyson is wrong here". The core is NOT spinning in relation to the crust.

[@Anne5440_]

Dr Tyson, you have helped this beginning geology hobbyist hugely today with this video. You answered many questions for me. I have long admired you. Your explanations are always done in a very fun way.

[@bob_s_drawkcab]

I love this! wish you luck! even though, there is no such thing haha

[@hareecionelson5875]

Scratch the rocks!

[@shaunhall960]

I'm here for the science and comedy. They work so well together.

[@houdini1972]

I really look forward to your videos. Thank you!

[@rjds3204]

You guys deserve at least 20 million subscribers!! 🙌🏽🙌🏽

[@nickpaine]

I've seen the poles flip, personally. It was at a circus in Warsaw. Really cool ! Seriously, these two are entertaining. I never thought science could be so funny !

[@Nana-vi4rd]

I want to thank both of you for this podcast or whatever one calls it. Finally I can understand as well as enjoy listening someone speaking about science and space. Mr. Tyson, just a little info, we share the same birth date, October 5. Though, I am eight years older than yourself. I also spent the first 3 1/2 years living in the Bronx...Holland Ave in fact. But I can do something you can't......take the month (10) multiply it by the day (5) and you will get the year......Not many can say that one can they......lol. Again, thank you, all these years I found science and talks about space BORING. But I can no longer claim that because you have made both topics interesting and understandable. And Chuck Nice make it actually funny. So thanks to both of you. I will be sure to try to get my grandchildren to listen to your program as well. Thank from Eastern Tennessee.

[@glenncurry3041]

This garden universe vibrates complete Some, we get a sound so sweet Vibrations reach on up to become light And then through gamma, out of sight Between the eyes and ears there lie The sounds of color and the light of a sigh And to hear the sun, what a thing to believe But it's all around if we could but perceive To know ultra-violet, infra-red, and x-rays Beauty to find in so many ways Two notes of the chord, that's our full scope But to reach the chord is our life's hope And to name the chord is important to some So they give it a word, and the word is ...

[@Teck_1015]

OM

[@russellhammond1283]

Ahhhh, Moody Blues, In Search of the Lost Chord, I bought it when it came out in 1968. I miss those old days.

[@glenncurry3041]

@@Teck_1015 you got it!

[@glenncurry3041]

@@russellhammond1283 Still have it and the rest of theirs. Saw them twice with orchestra!

[@erinmac4750]

I knew I recognized it! 💙🌌✌️😎

[@joshuamakonnen]

Awesome episode, Neil and Chuck! We’ll be waiting for the full episode 😁😁

[@sakhiim]

I love now how you visualise things , That helps a lot 👍🏿

[@brucegeertsen8715]

Keep educating and inspiring the way you are doing it, for old and young new scientists,

[@AbhishekNagarkar]

The Earth's core slows down everytime a startalk episode drops.. the earth is also listening and enjoying the podcast..

[@johnpaultunglut]

loved the illustrations. picture speaks louder than words 😉

[@Simp_Zone]

Would have been better if it was just Tyson talking and not being interrupted with dumb remarks all the time.

[@johnpaultunglut]

but that's the great part. what Tyson lacks in pop culture, Chuck provides. Chuck understands & tries to explain it using reference for those not so bright & intellectual people to understand. they were a great combination. the synergy is out of this world

[@Simp_Zone]

It's never okay when someone is trying too hard to be funny though. That's just me anyways.

[@johnpaultunglut]

all right.... understandable 😊👍🏻

[@Simp_Zone]

@@johnpaultunglut 😄

[@mRendyIrawan]

It would be very interesting to hear Neil discussing this with a geophysicist, I look forward to that episode!

[@barbaracorso2022]

🤯 😊 Wished I had you two as my science teachers 50 years ago

[@thePhished]

Loving the editing of these videos. The visuals add a lot. Keep it up!

[@abdulkareemalhamdani3060]

Amazing explanation, thank you sir. so at 15:25, does that mean we do not know why it happens?

[@EchoesDistant]

Great video, as usual! Thanks for the upload

[@BlinkinFirefly]

I love the chemistry of these two. I always enjoy their enthusiasm and passion ^^ Excellent stuff!!!

[@IceLordCryo]

Been seeing this all over the place, but wanted to wait to read anything about it until more research was done lol. Far too many articles going "IS THE EARTH'S CORE STOPPING?!" to grab attention. Looking forward to some facts for once XD

[@rebelranger7208]

Ioved this! Question is what will the impact of a magnetic field flip on a civilisation that has a multitude of built in reliance’s on magnetic functions? Satellites, computers, cars, mobile phones, landlines.

[@janette6]

...and animals who navigate using magnetic fields 🤔

[@mightyconker3903]

It'll be useful to convince the normies when they do cyber polygon

[@Rach_ella_bella]

I love their energy together!

[@brendanleenders61]

thank you for explaining scientifically how the earth is formed. Im 45yo and the first time its explained in such a way, rather than teachers just saying how it is, that made it ever so easily understood. Now I've been tracking the MNP (magnetic North Pole ) for about 10 years, and what some people dont know is that it was accelerating from its position and they are now both (MN & MS) both on the same side of the earth. What we know from childhood science is when you place two magnetic polarities on the same side, we get a flip of polarity. If I remember correctly, the MSouth is weaker than the MN. Will this be the causation for the flip in polarity? and what will happen on the surface when the change happens? I know its best guess, but the best I can perceive it is to be like a manual gearbox, the clutch goes in and becomes a shift in direction like grinding a gear maybe? I believe its sequence has begun, and we are like 10-25 years off.

[@James_Dowdy]

Check out suspicious observer. His channel is based on this.

[@brucehansen7949]

Check out Eric dubay he has real facts, yall got pseudo science religious bs

[@JMTScience]

well done again Neil.. excellent explanation

[@katrina81086]

Do a whole show on it please

[@bartux88]

I love this content! I cant stop watching these videos!

[@agontop1]

I love NDT’s ability to slow things down on a scale that the layman can understand it. His mind is not only able to correlate theory’s and ideas that would fry my cpu, he is then able to compute it to a language a common person can understand. That is a talent in it of itslef

[@diesel46809]

You two are the best, I've learned so much just listening to the both of you. It's always easy to learn about things when it's fun, and I tell you both your absolutely amazing. Keep up the great work. I hope some day I can be as smart as you guy's are. P.S. sorry to Harold as well. L.O.L

[@bgore3457]

You guys Rock! Pun intended. Very entertaining. Keep up the good work!

[@zeinaba5821]

Hi I'm recently interested in astrophysics , i mean I'm not even sure what it is ,but it's just so cool , and i wanted to thank u foe explaining it so great that me as a begginer can both understand the content and enjoy it , i really appreciate it Ps : my English level is intermediate and understanding science with my level just showes how great the teacher is , thank u 🌺🌺

[@mightyconker3903]

Try comparing the reflecting that a light makes on a sphere, to the reflection the sun makes on the flat sea as it "goes down". Science is based on observations, and there is no proof of the earth's curve, and we observe that water lays flat and level. No proof that earth is spinning, and we have Michealson Morleys experiment to observe there is in fact no spin. There is no proof of gravity and Einstein himself said that the prior mentioned Michealson Morley experiment "caused great embarrassment to the scientific community",as he could not then make gravity part of his model without creating dark matter and dark energy to do some extra accounting for him.

[@mightyconker3903]

Astrophysics is all pseudo science reverse engineered from observations that tell us that the earth is flat and motionless. Nasa only gives you cgi and wires

[@TheRealXyzven]

What's interesting is that Chuck is as smart as Neil but just in different aspects of knowledge. Amazing to be a fly on the wall for these conversations.

[@BostonMark]

Journey to the center of the planet very interesting subject. Thanks Neil for explaining 🙏

[@mightyconker3903]

The centre of our plane is the North Pole. Molten iron isn't magnetic

[@winoodlesnoodles1984]

Awesome video!!! Great job pointing out magnetic reversal! Most people have never heard about this, let alone know what it means. The next couple hundred years will be an interesting time for geologists.

[@r.lindoncoutts1897]

You won't have to wait that long ... prepare now.

[@Thedeepesttruth]

Okay I have a more qualifying questions in planet formation and gravity! What is the point of light gravity that sets up the creation of a planet? Like is it like the visual shown? How can another gravity field just pop up inside the field of the local star? Like what is the moment and point of inception of the start of the creation of a planet? Does the star form first then planets? Or all at once? And why would a planet form there? Could all planets be stars trying to form and failing? And how does gravity fall into place? Because it doesn’t fit the model of gravity we use the most. Where you put something heavy on a cloth plane. That imply a that there would be no gravity with out the dense mass, but then how did the dense mass come to be with no gravity to pull it together?

[@jyotishman]

You inspired many!

[@namret12]

Great chemistry! Good show!

[@gameaddictz327]

Or physics, depending on how you look at it 😂😜

[@jaredhowell7104]

I love how exited lord nice gets. Keep up the great videos

[@markybob_bassplaya1462]

I learned about this while in the Navy (+30 years ago), using MAD, you could see the magnetic barber pole coming from the riffs in the ocean floor (iron deposits) where the poles had flipped back and forth over the eons. I always wondered what effects we would see at the time of flip (cancer rates highrocketing, etc.) from the lack of comic ray protection. My question would be is the flip instantaneous?

[@terryreynoldson6698]

It's delightful when Chuck gets so excited 😊

[@armadilloross]

Enjoyed this thoroughly. Can we give these guys a show? I want more💯

[@jenz281]

I just love his genuine laughs and chuckles.

[@RuerlKhan]

I wonder: What impact on the formation of the iron ore seams and other heavy metal seams does the impact with the protoplanet that formed the moon have in the formation of the aforementioned heavy materials that are relatively easy to get to from the surface? I do not know if this was done while the earth was still in it's relatively liquid phase or not.

[@alannaofrann6767]

Does this mean that the Earth's core is embellished with megatons of gold, platinum, etc in addition to iron? Interesting to ponder that possibility!

[@DionSquire]

is an interesting thing to question, :) not a bad thing to ask questions.

[@mitseraffej5812]

Time to start digging.

[@user-ks8ff7jx5b]

Talking from Israel. The animated demonstrations REALLY help understanding. Please make more videos like that!

[@xVincentxValentine]

Good show and cast :D sometimes it takes a while before it finds an audience

[@malagastehlaate230]

I find this all facinating living somewhere where I know rocks rise to the surface... I moved somewhat north of where I used to live and up here in the spring farmers hire kids to go "rock picking" because of the ice age brining rocks down with the ice plates moving ... rocks over time slowly rise up through the dirt and need to be removed from the topsoil before the farmer plows so as not to destroy his plow. It's rather fascinating if you ask me. I had never heard of "rock picking"... as where I lived before the size of these rocks were much smaller, less abundant, and didn't really need picked up... But up here more in the northern part of my state... they do need to be picked up.

[@ReginaldDj1]

Hey Neil Degrasse I Do Have A ? So Once The Polls Reverse Does The North Becomes The South And Vice Versa + Do The Birds That Fly South For The Winter Do They Now Fly North ? Because Animals Do have There Own Guidance System

[@mr2atara]

But the birds have always flown north for the winter If they flew south, they'd be in Antarctica, which seems slightly counterintuitive if they're trying to dodge the cold. I wonder if it means that I'd be living in the Northeastern Pacific? Naming the two islands here in New Zealand "North Island" & "South Island" (the Māori names were a nightmare for the colonials lol) also may have been a bit short-sighted...

[@1mezion]

Every science teacher should be like Neel, could you imagine how many geniuses would be produced. This man is truly a treasure and should be treated as such his ability to break things down and keep you engaged should not be underestimated.

[@BobertTheThirdson]

Oh, this is so much better than the guy that says the core stopped spinning completely and then spun in the opposite direction. Transitioning from slightly slower to slightly faster makes much more sense than the core with all of its momentum just stopping and then reversing with no significant change in force applied to it.

[@tyronejones5515]

I been waiting on you to talk about this

[@originalhazelgreene]

Yes! Need a full explanation from a geologist 👍👍 thanks guys

[@freshkid420]

I love the interaction A great play on teacher and student So earth's solid innercore is comparable to heavy water with the high pressure surrounded by liquid versions in lighter pressures So interesting!

[@TonyM1961]

About a week ago, I came across one of those "the sky is falling" loons trying to say that the core had actually stopped spinning. I had everything I could do to not jump to the attack and simply explain that we have the evidence all around us that this cannot be. Since the core's rotation is what makes our magnetosphere which protects us from cosmic rays and since we aren't being severely irradiated, the core still be spinning

[@mightyconker3903]

The earth is flat mate. Ffs. I'm not kidding. Molten Iron isn't magnetic so good luck with that magnetosphere. Look at the reflection the sun makes on the sea. Then look at how light reflects off spheres. Do the basic observation. Look across the sea at islands further than the curve would allow you to see and see them with your own eyes and know that this is all a show and that its crippling real scientific enquiry.

[@k1j2f30]

@@mightyconker3903 Sheech! YCF!

[@MTUnique]

Is the solid core smooth out does it have bumpy pockets in it? If it's not smooth, won't it stir up the liquid core and the mantle when it rotates or when it stops and the planet is still rotating?