The lost continent of Argoland has been found (and other science news of the week)

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Sabine Hossenfelder

Sabine Hossenfelder

Күн бұрын

Expand your scientific horizon with Brilliant! First 200 to use our link brilliant.org/sabine will get 20% off the annual premium subscription.
This week we have new evidence that the dinosaurs were killed by the aftermath of an asteroid impact, then we have a look at the biggest universe simulation ever, talk about a lost continent that’s been found, roman ruins in spy footage, a new record for a single photon camera, an asteroid that might contain chemical elements which are not in the periodic table, super lightning bolts, solar glass, and of course, the telephone will ring.
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00:00 Intro
00:35 Asteroid dust killed dinosaurs
02:23 Record universe simulation
04:13 The lost continent of Argoland has been found
05:42 Roman forts found in spy footage
07:10 A single photon camera
08:46 An asteroid that might contain unknown chemical elements
10:48 Lightning superbolts correlated with low-hanging clouds
12:15 Solar glass moves towards consumer market
13:52 Learn science with Brilliant
#science #sciencenews #quizwithit

Пікірлер: 882
@SabineHossenfelder
@SabineHossenfelder 3 ай бұрын
This video comes with a quiz which you can take here: quizwithit.com/start_thequiz/1699239593841x485292329687801800
@eonasjohn
@eonasjohn 3 ай бұрын
Thank you for the news.
@S1nwar
@S1nwar 3 ай бұрын
around 10:05 you screwed up and have m³ instead of cm³ in the density units
@bramfran4326
@bramfran4326 3 ай бұрын
10/11, missed the 3rd one.
@klocugh12
@klocugh12 3 ай бұрын
Yay, full 11 this time!
@Gemini_0815
@Gemini_0815 3 ай бұрын
Sabine Theres a glitch at 10:04 it says “g/m2” instead of “g/cm2”
@michaelpolakowski7301
@michaelpolakowski7301 3 ай бұрын
Many years ago, I read an adventure novel called The Ice Limit. It dealt with trying to retrieve a large meteorite made of some unknown substance. The substance was believed to be part of the "island of stability" that Sabine mentioned. The density and size of the meteorite, and the fact that retrieval meant that it had to be secretly unearthed and stolen via supertanker, posed all sorts of interesting challenges. Recommend if you like techno-thrillers that don't end particularly well.
@sethtenrec
@sethtenrec 3 ай бұрын
Let’s just say no icebergs were hurt
@Bayerwaldler
@Bayerwaldler 3 ай бұрын
Read that one too. If I remember correctly, the material turned out to be too heavy…
@AgenteSmart
@AgenteSmart 3 ай бұрын
Read that book too, it's a very entertainign read. It has a sequel but you'll save yourself a major disappointment by not eading it... like, seriously, do not read it.
@luminiferous1960
@luminiferous1960 3 ай бұрын
At 7:24 when Sabine says that single-photon cameras are as sensitive as a camera can possibly be because they can detect a single photon, some may think that all single-photon cameras are equally sensitive, but this is not the case. Different types of single-photon detectors used in single-photon cameras have different photon detection efficiencies (PDEs) and different dark count rates (DCRs), causing them to have different sensitivities. The PDE is the percentage of photons incident on the detector that are actually detected. For example, a detector with a PDE of 50% only detects half of the photons incident on it. The DCR is the rate at which false detection events (aka dark noise counts) occur when no photons are incident on the detector. PDEs can vary from a few percent up to about 98%, and DCRs can vary from less than 1E-03 counts per second to hundreds of thousands of counts per second, depending on the detector materials, detector type, and operating temperature. Superconducting nanowire single-photon detectors (SNSPDs) have demonstrated particularly high PDEs of about 98% with very low DCRs of about 1E-03 counts per second, and very low timing jitter of less than about 3 ps. Their drawbacks are that they typically need to operate at a temperature below 2.5 K and they are very expensive. On the other hand, semiconductor-based single-photon avalanche photodiodes (SPADs) are convenient, room-temperature, low-cost, and high-performing detectors. A fairly established technology exists for detection of visible light photons, but detectors at telecom wavelengths require significant improvement. Currently, they offer a reasonable PDE (~50%), although dark counts and afterpulsing are still challenges to be addressed. These issues are particularly important for high-speed quantum networks.
@jeffeloso
@jeffeloso 3 ай бұрын
On the screen you got the density units wrong - came up a grammes per cubic metre and not centimetre! Most of us know what you meant and we love your news and satire.
@denverbraughler3948
@denverbraughler3948 3 ай бұрын
The graphic was wrong on the solar energy captured by the window glass.
@georgepelton5645
@georgepelton5645 3 ай бұрын
@@denverbraughler3948 I noticed that too. It said "kW" but Sabine said "kWh per day," which would be about 1/10 as much power.
@idontdogmail1669
@idontdogmail1669 3 ай бұрын
What does this speak to the pathetic attempted jab at Elon Musk? EVERYTHING!!!!!
@MrFLUIZZLE
@MrFLUIZZLE 3 ай бұрын
Great episode, very informative and interesting. Thanks Sabine!
@TrivialTax
@TrivialTax 3 ай бұрын
Splendid video, like always! One small error in captions - density of asteroid was displayed as 75g/m^3, not cm^3.
@reporeport
@reporeport 3 ай бұрын
GREAT job explaining the camera. I never would've understood that without your great explanation
@timmccormack3930
@timmccormack3930 3 ай бұрын
Last I saw, the asteroid survey that's our source for information about 33 Polyhymnia had produced information about another asteroid's density that was later determined to be 10x too high. I wouldn't get too excited about this one -- rather than concluding it is ultra high density, we should instead conclude that we're wrong about its mass and size.
@Alondro77
@Alondro77 3 ай бұрын
I looked up the most recent data, which reexamined and recalculated the mass, which dropped the density down to between 7 and 12g/cm3. Still quite high, meaning it's a solid metal body. A VERY valuable resource for space construction!
@MichaelWinter-ss6lx
@MichaelWinter-ss6lx Ай бұрын
What happens when two WhiteDwarfs collide? Or NeutronStars. That is super dense material. It might decay until it reaches the island of stabillity? I dont think that all evaporates entirely in the supernova. Thats not the universes way.
@timmccormack3930
@timmccormack3930 Ай бұрын
@@MichaelWinter-ss6lx Well, supernovas are a different thing than neutron star collisions -- anything to do with supernovas and white dwarfs will only produce elements that go a bit beyond iron, as far as anyone is aware. Neutron stars, that's more plausible. If there's an island of stability, I would expect merging neutron stars to produce _some_ nuclei in that range -- but I wouldn't expect them to produce large masses that are all _entirely_ in the island of stability. Most of the debris would decay down to lighter elements, and you'd have at most trace amounts of the super-heavy stuff, not appreciably affecting the density of the resulting objects. (Not a physicist, though.)
@RegisDee
@RegisDee 3 ай бұрын
10:07 and around then the units are described as g/cm3 in Sabine's commentary but the graphics show g/m3
@jonwesick2844
@jonwesick2844 3 ай бұрын
I guess that would solve the asteroid's composition mystery.
@denverbraughler3948
@denverbraughler3948 3 ай бұрын
The graphic was wrong on the solar energy captured by the window glass.
@KeithCooper-Albuquerque
@KeithCooper-Albuquerque 3 ай бұрын
Thanks for another informative roundup of science news! You are the best!
@chrisduffill5248
@chrisduffill5248 3 ай бұрын
I love your science updates . Many thanks
@certuv
@certuv 2 ай бұрын
An enjoyable way to present science development, thank you.
@pressuredrop1
@pressuredrop1 2 ай бұрын
Wow. What an information packed session. Signed up for Brilliant via your link. Looks fascinating. Been a Patreon supporter for a while now and really appreciate your efforts. Thank you and Merry Christmas and happy holidays. Keep up the great work.
@SabineHossenfelder
@SabineHossenfelder Ай бұрын
Thank you from the entire team!
@UserNameWasCensored
@UserNameWasCensored 3 ай бұрын
One of the most peculiar things about science and scientists is the propensity to re-invent the wheel. Back in the late 80's, when I was studying geology at university, the professors talked about the iridium anomaly and a comet/asteroid wiping out the dinosaurs. The proof was in the crater in the Yucatan peninsula. These discussions were pretty much presented as factual and a done deal. It's great that this same hypothesis can be once again stated and published 35 years later 😁
@bobsyouruncle66
@bobsyouruncle66 3 ай бұрын
It's not reinvesting the wheel, its finding new data as discoveries are made that support an idea. The more factual support an idea receives the more likely the idea is correct. Science never stops...for around 300 years Newton's gravitational ideas explained a lot and were very useful. However there was some incompleteness about his theory of gravity, specifically, regarding time dependance. It seemed Newton's gravity acted instantaneously on masses far apart, but without explanation. Some physicists addressed the problem, but it wasn't until Einstein came up with general relativity that time was added to the gravitational theory replacing Newton's ideas as a more complete theory. There are issues with Einstein's ideas (eg. unification with quantum mechanics), but as of now (to my knowledge) we don't have a more accurate replacement theory.
@UserNameWasCensored
@UserNameWasCensored 3 ай бұрын
@@bobsyouruncle66 I have no qualms with what you've written except for the fact that you didn't address my comment. What your response might have been is this: Newton wrote about his "Theory of Gravity" in 1692. Then in 2023, Dr. Goofball published an article in the Physics Review about his newly formed concept of "gravity", which is said to describe an object attracting another point mass via a line intersecting both points, with the force proportional to the product of the two masses.
@diyeana
@diyeana 3 ай бұрын
Sabine: "I'm not that smart ... I have my own course on Quantum Physics, my favorite topic!" 😂 I love you, especially because of your smart brain.
@levilukeskytrekker
@levilukeskytrekker 3 ай бұрын
On the note of the impact crater and dinosaurs, have you ever read up on the Tanis site dig? They found spherules that match the crater in what is now modern-day North Dakota (inhaled in fossilized fish gills, if I'm not mistaken), along with a lot of fossils that seem to have been abruptly killed all at once and rolled together.
@johnh539
@johnh539 3 ай бұрын
Yes Tanis is fascinating. The spherules fell like molten glass rain, (some sort of umbrella pattern) here though they are talking about much finer particles that unlike the spherules staid air born for years. traveling it seemed east north east. I wander given it's Caribbean impact if that could explain why the South American Dinosaurs seem to have faired a little better than any where else
@t.c.2776
@t.c.2776 3 ай бұрын
@@johnh539 this will be proven when they find a preserved dino in the Russian permafrost and can take a cross section of it's lung tissue... The only problem is that will take a lot of thawing... and massive global warming...
@FredPlanatia
@FredPlanatia 3 ай бұрын
Something i always enjoyed in your videos on physics topics was your critical assessment of the scientific basis for the ideas behind cutting edge research. i mean you didn't just repeat the interpretation of the proponents but pointed out what those ideas are based on and if (in your opinion) those ideas where sound and why. I'd really enjoy if a bit more of this style entered your weekly science reports (even if it was at the expense of a few jokes). For example in this episode an asteroid is reported to have 3x the density of the densest element we know to exist. That seems a claim which requires strong evidence. None was mentioned. How was the density of this asteroid determined and how convincing is this evidence?
@tolkienfan1972
@tolkienfan1972 3 ай бұрын
Not "known to exist", but "known to exist on Earth". That's really quite different. The chemical makeup of Earth is quite different to that of extraterrestrial objects.
@FredPlanatia
@FredPlanatia 3 ай бұрын
@@tolkienfan1972 known to exist by humans anywhere. We don't know of any elements heavier anywhere yet. From our theoretical understanding of nuclear physics we think their might be more dense elements but we don't know of any that exist (on earth or elsewhere). This asteroid might be the first indication of such an element but that is based on the density determination. I think it would be interesting to know how the density was determined and what the potential errors are in that density determination.
@lexpox329
@lexpox329 3 ай бұрын
There are large error bars on those density estimates due to imprecise orbit measurements. This will most likely turn out to be a nothing sandwich. Fraser cain covered this recently and briefly explained how they got the density estimates, I think it was his channel anyway.
@pozzowon
@pozzowon 3 ай бұрын
10:10 I'll counter that the best fit for the new asteroid is more likely to be a bad measurement somewhere...
@MichaelSchwark-yn3jb
@MichaelSchwark-yn3jb 3 ай бұрын
I live in Chile and I once saw one of those superbolts happening overland! They are impressive!
@tstephens128
@tstephens128 3 ай бұрын
Thanks for the video!!🥰
@Alondro77
@Alondro77 3 ай бұрын
The newest study on that asteroid dropped the mass quite a bit, but it still has a density of between 7 and 12g/cm3, which is STILL exceedingly dense, and means it's entirely metallic with an average density somewhere around silver's.
@Popashistory
@Popashistory 3 ай бұрын
With the dinos, geologists and paleologists have been using the Iridium Anomaly layer (attributed to the extinction asteroid event) for dating purposes for a while now. No dinosaur stuff above the Iridium layer. Thanks for the news.
@Beadfishing
@Beadfishing 3 ай бұрын
I was also confused by the title. Knowing the geology. But I guess it would make sense that we don't know exactly how they died just that we can date the event.
@bozo5632
@bozo5632 3 ай бұрын
IIRC didn't the numbers start declining before the impact?
@draculakickyourass
@draculakickyourass 3 ай бұрын
Interesting the fact they use Iridium for dating......i personally use flowers and dinner....
@blucat4
@blucat4 3 ай бұрын
@@bozo5632 Yes, they were slowly starting to die for thousands of years prior, the impact seems to be the final blow.
@Popashistory
@Popashistory 3 ай бұрын
Perhaps they were busy evolving into chickens and such
@marklondon9004
@marklondon9004 3 ай бұрын
"I'm not all that smart" says the assistant professor of Theoretical Physics...
@ConontheBinarian
@ConontheBinarian 3 ай бұрын
And I'm a genius says a guy with a GED who watched Graham Hancock. Lol.
@davidkaplan2745
@davidkaplan2745 3 ай бұрын
I think it's far more likely that the computation of Polyhymnia's density is wrong rather than the crazy hypothesis of super heavy elements.
@tarlneustaedter
@tarlneustaedter 3 ай бұрын
There is only one study that came up with that density, and that study was well recognized for getting bad densities. A second study by someone else using other methods found a density around 7 g/cm^3.
@firstlast-ty4di
@firstlast-ty4di 3 ай бұрын
I wonder what would prevent accretion of "space dirt" onto Polyhymnia. A body with the claimed density would easily gather up matter in its vicinity. Then, of course, its density would fall. Oh well, I guess we can't expect peer reviewers to catch everything.
@kentmerrill8925
@kentmerrill8925 3 ай бұрын
You are great!! I have a good time listening to the videos. I only understand about though but that is enough. More would make my head uncomfortable. Thanks for the show!!!
@oscaramtz
@oscaramtz 3 ай бұрын
The distribution of "hotspots" on the superbolt map reminds me of the gravity map of earth, could be related in any way? Greetings, love your videos and podcasts
@davidladd5597
@davidladd5597 3 ай бұрын
Good Question!!! Google articles on Curie temperature in magnets. Metals above the Curie temperature become paramagnetic (can’t hold a fixed orientation). I never thought to check to see if any metals could be molten and still ferromagnetic? Off to see the (Mr.) Wizard!
@taalmala
@taalmala 3 ай бұрын
Thanks Sabine. You`re always full of interesting information, and bad jokes.
@djannias
@djannias 3 ай бұрын
Have really been enjoying your videos Sabine, thank you.
@jeffeloso
@jeffeloso 3 ай бұрын
Also not sure about the units for the generation of electricity from the solar glass. You said 1.35 kilowatt-hours (or standard units of electrical energy) per day for 10 m squared area. To me that does not seem very much as we have conventional solar panels on our roof. However on screen the units were kilowatts (ie power) which is reasonable for peak generation for that area on a very sunny day, facing the best aspect of the sun. Which did you mean?
@tl4ever262
@tl4ever262 2 ай бұрын
Driest sense of humor on the internet. Love it never change.
@AICoffeeBreak
@AICoffeeBreak 3 ай бұрын
What a treat for an otherwise frustrating evening programming neura networks! 😊 Thanks, Sabine!
@doughamblett5204
@doughamblett5204 3 ай бұрын
We have seen a few super lightning bolts over the Straits of Juan de Fuca, here, between the Olympic Peninsula and Canada's Vancouver Island. They are, of course, huge. Some photos show dozens of simultaneous paths. They are always the single strike in any given storm. As if the storm is giving up all of it's pent-up charge in one fell swoop.
@pong9000
@pong9000 2 ай бұрын
I saw weird lightning striking a sandspit in this area, farther up the Strait. Weird because it lasted about 1-1/2 seconds, pouring into one place. Ten years old at the time, so glad to know I wasn't imagining it.
@grokeffer6226
@grokeffer6226 25 күн бұрын
Fascinating and logical, too. 🖖🖖🖖
@cebas7
@cebas7 3 ай бұрын
Sabine YOU ARE AWESOME 😄👍🏼 LOVE your videos ,thanks!
@VFella
@VFella 2 ай бұрын
Kudos for FLAMINGO! We work a lot with the Uni Leiden, and we do have a few alumni working with us at Surf. It is also awesome to see that our British friends are still in the game making science with the rest of Europe and the international community.
@nitroxide17
@nitroxide17 3 ай бұрын
Love this video. Well done Dr. Hossenfelder!
@TheSteakLP
@TheSteakLP 3 ай бұрын
Sabine is so smart and i only understand half of what she's talking about, i wish there was a website i could go on to become smarter!
@mikesheehan5946
@mikesheehan5946 3 ай бұрын
If you could turn down the volume of that ringing phone it'd be greatly appreciated! Or set it up in the kitchen like the good old days and get a loved one to let you know it's for you. Love your videos. I'm a big fan
@scottjuhnke6825
@scottjuhnke6825 3 ай бұрын
Dutch land jokes never get old! LOL
@hieronymusbutts7349
@hieronymusbutts7349 3 ай бұрын
That line about the Dutch being paranoid about losing land made me shriek hysterically. For those who don't know, a lot of the Netherlands is made up of land that's been reclaimed from the ocean floor - giving the Dutch the very rare honour of being able to say they did actually create their land. "Sea above land Where they laugh at the tides And they do cause they can In the flatlands of Holland..."
@hieronymusbutts7349
@hieronymusbutts7349 3 ай бұрын
I went looking for the attribution to that quote but couldn't find it, so I'll leave a note here: The quoted verse above is from a poem by Melanie Safka in the 1970s about the Netherlands. The version I have heard is from the album Photograph, which was published in 1976, then taken off the shelves for 30 years until rerelease in 2005 on a small label in northern Europe. It's a fantastic album and worth your time to look up.
@mirasmussabekov4897
@mirasmussabekov4897 3 ай бұрын
Q
@Roxor128
@Roxor128 3 ай бұрын
Wait until we properly get into space. We'll be building billion-tonne space habitats, which will be a whole new form of building new land.
@patrickherke8947
@patrickherke8947 3 ай бұрын
​@hieronymusbutts7349 do you know what artists made the album? Tried finding but the name makes it a bit difficult
@JasperKloek
@JasperKloek 2 ай бұрын
Haha! That line made me laugh hysterically as well. And if it matters: I'm Dutch.
@user-ed6ch1zv1e
@user-ed6ch1zv1e 2 ай бұрын
Well that was a very nice and friendly quiz. Nice initiative and as always with a slight slang-ish tone You rock.
@xitheris1758
@xitheris1758 3 ай бұрын
Scientists: "It's an acronym." Normies: "You keep using that word. I don't think it means what I think you think it means."
@lokilawson
@lokilawson 3 ай бұрын
Huh?
@xitheris1758
@xitheris1758 3 ай бұрын
@@lokilawson It's a Princess Bride reference. It's a joke for when someone keeps using a word in ways that increasingly differ from its actual definition.
@lokilawson
@lokilawson 3 ай бұрын
@@xitheris1758 ah, well then. As you wish.
@helderalmeida2790
@helderalmeida2790 3 ай бұрын
About the dust that killed the dinosaurs. I believe its a combination of the asteroid, dust, earthquakes, huge tsunamis, India deccan traps and forest fires all around the world and no sun light that resulted earth cooling. So yeah its a combination of a lot of factors
@pong9000
@pong9000 2 ай бұрын
The least cinematic explanation is that unusually dense meteor showers sustained over centuries did the job. Sure, Chicxulub could represent the largest impact from a cloud or comet trail relentlessly bombarding Earth with particles that need only disintegrate in the atmosphere.
@tkonan
@tkonan 3 ай бұрын
Hi Sabine. I don't know how to search the other 732 comments to see whether anybody else mentioned this, but at 13:30, you talk about the ClearVue quoted energy output and there's an ERROR there. You say 1.35KWh per day, while the screen graphic says 1.35KW - a factor of 24 difference. Which is it? I checked the description but saw no correction for this, so I presume I'm first to point this out. All the best.
@AlexAetM
@AlexAetM 3 ай бұрын
Благодарю Вас за Вашу работу, Сабина! Каждую неделю жду ваших видео.
@SLYdevil
@SLYdevil 3 ай бұрын
❤ Wunderbar
@gamesturbator
@gamesturbator 3 ай бұрын
At the time I was growing up in Lake Placid, Florida late 60's to the mid 70's, it was considered to have the 2nd highest number of lightning strikes in the world. Maybe it was the US, I was very young when I read that, so don't quote me. I just remember seeing more lighting storms than I've ever seen in my whole life anywhere else. When I was seven or eight, I had lightning strike the road maybe 30 feet from me while I was walking home from just swimming in the lake. Very few days ended without a storm coming. It made my scalp sting and my hair stand up. Before I was born lightning split a tree less than 20 feet from our living room. Don't get me started on how many times I escaped death in some weird way.
@internetcomposting8726
@internetcomposting8726 2 ай бұрын
Back in my late teens, I was driving around with my boyfriend at the time & we heading towards an intersection & lightning struck the stoplight ahead of us (30') & my car went dead & we coasted through. Just after we coasted through, another lightning bolt hit the other stoplight right behind us. The car coasted to a stop & I turned it off & back on again. No damage. It was so weird. After that I can sense lightning strikes within a 10 mile storm as very minor jolts in my hands - about half the strength of a typical static electricity zap. I've also had lightning come in through the house & got zapped through my mouse. That felt like a book dropped on my thumb. Lightning & I don't get along very well...
@thundabird93
@thundabird93 3 ай бұрын
what period table were you showing? @9:00 the last 5 elements Ive never seen those names for them. wheres oganesson??
@enmodo
@enmodo 3 ай бұрын
I loved the subtle dig about physicists getting shit for going outside of their field. Well played Sabine, well played indeed.
@tubapaco
@tubapaco 3 ай бұрын
@Sabina, You said "cubic centimeter" and displayed cubic meter... Thank you for producing content 2x/week.
@iksRoald
@iksRoald 3 ай бұрын
I do really like most of your programs, but today I wondered about your refernece to the solar glass producing so many kWatts per day? Watts are per second already, so so it should be kWh per day?
@kiteblaster
@kiteblaster 2 ай бұрын
Good stuff Sabine! I'm also appreciating your sense of humor; paleo diet advice from dinosaurs, and Dutch Dike paranoia. Liked and subscribed! The fort analysis shows how much our perception shapes how we see "facts." It will be exciting how much AI and GAI will change our perspective.... perhaps if we can somehow stop obsessively building weapons to kill each other and everything else, the new tech may teach us about ourselves and our universe.
@Perplaxus
@Perplaxus 3 ай бұрын
Thank you Ms Hossenfelder
@mwmentor
@mwmentor 3 ай бұрын
Well Sabine, in the first quiz that I did, I got 10 out 21 right, then 12. This week 10 out of 11 - you're slacking off - lol :-D Thanks for yet another interesting, and entertaining video. :-)
@SLYdevil
@SLYdevil 3 ай бұрын
I missed 2 & wanted to see what I got wrong (or if the Qs were poorly written) but apparently that is impossible, unless you pay$
@0-by-1_Publishing_LLC
@0-by-1_Publishing_LLC 3 ай бұрын
... I got 12 out of 10 in the math-quiz section.
@mwmentor
@mwmentor 3 ай бұрын
@@0-by-1_Publishing_LLC 😆
@FirestormX9
@FirestormX9 3 ай бұрын
I got an 11/11 on this quiz :D
@Allan_aka_RocKITEman
@Allan_aka_RocKITEman 3 ай бұрын
*Sabine: Great video...👍*
@mattmaloney5988
@mattmaloney5988 3 ай бұрын
Dark matter “… because there’s more of it, if it exists” 🤣 You’re the best.
@kazimierzmarkiel5400
@kazimierzmarkiel5400 3 ай бұрын
Ms Sabine I am thinking about the supersensitive cameras seeing the single photon. I am looking what exactly this apparatus is showing after the single photon hit the sensor- is it related to the properties of photon itself,to the atom properties of the camera sensors or both? And finally what the observer can see as the result of measurement? How many times the signal output need to be amplified? Please comment. Stary
@emergentform1188
@emergentform1188 3 ай бұрын
Love it, hooray Sabine!
@petersmythe6462
@petersmythe6462 3 ай бұрын
The most recent analysis suggests a density for 33 Polyhymnia that is between about 4.5 and 17 g/ml, which overlaps the range for conventional matter and even for iron-nickel asteroids. The most parsimonious assumption is that it is a typical core fragment of a differentiated body. The second most parsimonious idea is that it is made of gold or something else much denser than iron-nickel, but not unknown to science. It being composed of a billions of years half life or completely stable nuclide that isn't even present in trace amounts in Earth's crust even from impact events would be decidedly odd, and would require incredibly bizarre formation and deposition dynamics to account for. The position of the asteroid in the main belt and its reasonable size also likely preclude more exotic origins and compositions including neutron stars or supernovae.
@Darisiabgal7573
@Darisiabgal7573 3 ай бұрын
How much are we paying attention? 10:03 26g/m^3 would make it less dense than hydrogen😂
@DIY_Off-Grid
@DIY_Off-Grid 3 ай бұрын
Was about to point it out😅
@jacquespansegrouw5513
@jacquespansegrouw5513 3 ай бұрын
Sabine went off script and stated the unit correctly. Good save!
@tonywells6990
@tonywells6990 3 ай бұрын
That would be just as ridiculous as an asteroid with a density 10 times that of Iron!
@Darisiabgal7573
@Darisiabgal7573 3 ай бұрын
@@tonywells6990 Have you ever played KSP😂
@vesawuoristo4162
@vesawuoristo4162 3 ай бұрын
I would think the highly heated atmosphere had something to with the extinction.
@blucat4
@blucat4 3 ай бұрын
The reduction in oxygen in the atmosphere was killing them off slowly before the impact, apparently.
@howtocookazombie
@howtocookazombie 3 ай бұрын
12:18 Still a good idea. Since many people are using window shutters (louvers) to block more or less sunlight to reduce heat, why not convert that to electric energy through nano particles in a more transparent way and maybe even automatically? That way the window glass regulates the brightness automatically and keeps it always at the same level.
@pong9000
@pong9000 2 ай бұрын
Or just upgrade those existing shades you mentioned, with conventional photovoltaic versions that generate 10x the electricity?
@howtocookazombie
@howtocookazombie 2 ай бұрын
@@pong9000 Wouldn't conventional photovoltaic plates completely block any light, since they are opaque? The purpose of a window is to let light in / be able to look through it.
@What1zTyme
@What1zTyme 3 ай бұрын
Plenty smart.. and wicked funny! (That's a compliment around my patch of the Pale Blue Dot)
@stephan-alexanderheyn9817
@stephan-alexanderheyn9817 3 ай бұрын
Dear Prof. Hossenfelder, @9:00 the Periodic Table Chart ist presented. Unfortunately there are two flaws in it: Element no 117 (Uus for Ununseptium) is named Tenessine, Ts and no. 118 (Uuo for Ununoctium) is named Oganesson, Og.
@NeoShameMan
@NeoShameMan 3 ай бұрын
The graphist sneaking in a yamcha dead meme in the thumbnail deserves a raise 😂
@Persun_McPersonson
@Persun_McPersonson 2 ай бұрын
There are a few unit errors here: 1) At 10:01, you correctly state that osmium has a density of ≈ 23 g/cm³ but the graphic says it's 23 g/m³. The same unit error was repeated for Polyhymnia aswell. This could have been avoided by simply double checking. 2) Then, at 13:30, you say 1.35 kW⋅h, which is in a unit of energy, but the graphic says kW, a unit of power. This could also have been avoided by double checking, but could have been even more easily avoided by using the SI unit of energy instead of a non-SI unit: 4.86 MJ.
@danielirwin2907
@danielirwin2907 3 ай бұрын
I am probably being pedantic, but your units for density were incorrect. You had g/m3 and it should have been g/cm3. That being said, I absolutely love your channel.
@MandosaWright
@MandosaWright 3 ай бұрын
Awesome Sabine you have given me hope, because I'm not all that smart either :)
@Centurianarv
@Centurianarv 3 ай бұрын
How wonderful 14:00, to hear someone use 'among' when 'between' would have done. Sabine has more than one string to her educational bow
@nathanokun8801
@nathanokun8801 3 ай бұрын
That possible super-heavy element paper is fantastic. Though sci-fi, that is what was the basis in the great E.E. "Doc" Smith space opera books in THE SKYLARK OF SPACE book series (STAR WARS is its best descendent).
@brandonsaffell4100
@brandonsaffell4100 3 ай бұрын
New study finds, or new study suggests. I dont feel like we've adequately characterized the error bars here, one of my biggest pet peeves.
@Jari1973
@Jari1973 3 ай бұрын
Thanks for the video!! The channel has more than 1,000,000 subscribers.. so I'm pretty sure I'm wrong.. but I, as a science enthusiast and ADHD person, I watch these videos for 10 sec + 10 sec because Sabine is so beautiful 🥰
@c3n5i
@c3n5i 3 ай бұрын
i adore your(?) style, keep upt the new pls
@SAM-tn8nn
@SAM-tn8nn 3 ай бұрын
Please make one lectures on graphene and theoretical physics. Thanks Regards
@geronimo4511
@geronimo4511 3 ай бұрын
'The Dutch seem somewhat paranoid about losing land, don't they' 🤣 love the humour!
@georgH
@georgH 3 ай бұрын
Came to the comments for this!
@ELXatrix
@ELXatrix 3 ай бұрын
well not so sure about that solar glas, some might want to get some infrared inside the house for heating and not catch and reflect most of it at the window...yes glas pannels wich generate some power and are still working as a window are nice but if i need to use more power to heat the room cause the window blocks the heat from coming in it might not be that great...
@billtreusch
@billtreusch 3 ай бұрын
Great video and thumbs up on the Dutch paranoia/ lost land joke!
@donm5354
@donm5354 3 ай бұрын
Not sure about the Silica Dust explanation for Dinosaurs since it would have also affected avian reptiles, alligators, crocodiles and even small mammals as well. I cant imagine even if the remained underground for awhile in caves, they could have stayed there long enough until the air cleared. Though it may have played a role close the impact site. I think they were so large, their food supply would have dwindled even on the other side of the planet under a cold dark death shroud encircling the Earth for who knows how long.
@musaran2
@musaran2 3 ай бұрын
One hypothesis is the survivors species were the ones more tolerant of low air quality. It was certainly the case of burrowing mammals of the time, probable too for diving animals like crocodilians, and avians have excellent respiration. Some are equipped against cold too, which would have been a co-factor.
@pong9000
@pong9000 2 ай бұрын
Bear in mind that beach and desert sand is composed of silica, and when wind erodes it that is silica dust you see in the air. Terrestrial animals have long evolved resistance to such weather. Any dinosaur already adapted to beach or desert habitat would hardly bat a second eyelid.
@mlowry
@mlowry 3 ай бұрын
The Y axis of that graph showing the island of stability is obviously protons not photons.
@nitroxide17
@nitroxide17 3 ай бұрын
9:15 Heavy breathing as a stargate fan
@edt.5118
@edt.5118 Ай бұрын
"...they could have chimed in on the Palio diet." Excellent dry humor.
@ghostmantagshome-er6pb
@ghostmantagshome-er6pb 3 ай бұрын
The roman thing sounds like trade " missions " ,baby steps like we have to do in space.
@davidrennie8197
@davidrennie8197 3 ай бұрын
The animations/screen overlays for density of osmium and polyhymnia used grams per cubic metre instead of per cubic centimetre
@michaelflomer8348
@michaelflomer8348 2 ай бұрын
Cheers!
@DragoNate
@DragoNate 3 ай бұрын
dang who'd've thought that "Large-scale-structure-simulations-with" was a SINGLE word!!
@irenerosenberg3609
@irenerosenberg3609 3 ай бұрын
At about 10:00, graphics on element densities show cubic meters, but Dr H says cubic centimeters.
@raktoda707
@raktoda707 3 ай бұрын
Stellar!
@JohnChampagne
@JohnChampagne 3 ай бұрын
I think it's far more likely that the estimates of size or mass are in error than a super-dense material is involved.
@IDraganM
@IDraganM 3 ай бұрын
Please correct text around the 9:52, speaking about specific densities, you are talking about cubic centimeters while graphic is displaying same number in grams per cubic meters.
@bettywing52
@bettywing52 3 ай бұрын
Super -lightning over the likes of Wales or Cornwall seems appropriate after reading all those Daphne Du Maurier books 🧜‍♀
@KaiHenningsen
@KaiHenningsen 3 ай бұрын
But Sabine, the dinosaurs *did* stay around. We're at the time of year when they form massive groups to relocate to warmer areas.
@Warp9pnt9
@Warp9pnt9 3 ай бұрын
"The Dutch seem somewhat paranoid about loosing land, don't they?" -- Low blow! XD
@johndododoe1411
@johndododoe1411 3 ай бұрын
The density observed could be slow-decay isotopes of heavy metals like Uranium or simply a lack of accuracy .
@kj1483
@kj1483 3 ай бұрын
1:30 Vredefort Crater is largest, estimated diameter of some 300km; not far from Johannesburg in South Africa... formed about two billion years ago. Chicxulub crater formed slightly over 66 million years ago when a large asteroid, about ten kilometers (six miles) in diameter, struck Earth. Chicxulub crater is estimated to be 180 kilometers (110 miles) in diameter and 20 kilometers (12 miles) in depth.
@gcewing
@gcewing 3 ай бұрын
13:34 1.35 kWh per day is NOT 1.35 kW, it's only 56.25 W on average, or maybe about 200 W peak assuming around 6 hours or so of usable sunlight per day.
@waldolemmer
@waldolemmer 3 ай бұрын
Dozens of people caught the g/cm^3 error, but only you and I caught this one, lol
@TheSwamper
@TheSwamper 3 ай бұрын
"...dark matter, if it exists." Thank you! I'm getting a little tired of people claiming it conclusively true.
@bugsmousey9183
@bugsmousey9183 3 ай бұрын
Somehow it manages to sneak in a science report. Tell me professor does dark matter act like a shepherd, keeping the stars at the edge of the galaxy in the flock? Seems kinda vague and convenient how it applies here and there, but not over there, and back here, like some sort of cloud released from some sort of box
@boam2943
@boam2943 3 ай бұрын
Errors @10:05 and @10:10. The text on screen displays cubic meter (m³) and should be cubic centimeter (cm³) as you correctly say.
@kyron6643
@kyron6643 3 ай бұрын
Hi Sabine. Love YOUr channel, but why didn't you mention that Walter Alvarez was a geologist, and that he had the initiative to take his father on the research project.
@thelazy0ne
@thelazy0ne 3 ай бұрын
09:24 *protons m3 is cubic meter
@ominollo
@ominollo 3 ай бұрын
10:21 fascinating idea but is it really the most plausible explanation? Maybe an idea for a video about the island of stability? 😅
@tonywells6990
@tonywells6990 3 ай бұрын
They tried to estimate the masses of many asteroids using different techniques such as perturbations from other objects and tracking their movements. Some of the data was just very poor, leading to some estimates being rejected based on being unphysical, such as the unphysical high density of 33 Polyhymnia and some that were too low in density.
@sydhenderson6753
@sydhenderson6753 3 ай бұрын
@@tonywells6990 I figured it's far more likely a mistake in calculating its mass than that its elements with atomic numbers in the 160s.
@tonywells6990
@tonywells6990 3 ай бұрын
@@sydhenderson6753 I could have just said that yes 😂
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