The dark side of the universe | Tara Shears | TEDxArendal

In her spare time Tara communicates her science and work to a wide variety of audiences, through media, talks, on radio and film. In 2012 she became the first female professor of physics at Liverpool University. In this talk at TEDxArendal, she gives a glimpse into one of the largest mysteries in the universe - the unseen “dark matter”: what is it? Moreover; How do we find something we struggle to even measure?
Particle physicist Dr Tara Shears is a researcher at the Large Hadron Collider (LHC) at CERN, the European centre for particle physics. Tara joined the LHC Beauty experiment at CERN’s Large Hadron Collider in 2004, where she started a program of electroweak physics - seeking answers as to why there is so little antimatter in the universe. She has performed many precise tests in particle physics theory, and her research program continues to this day.
This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at ted.com/tedx

[@asifnaveed7269]

Her tone of voice and facial expressions indicates her thorough involvement in the subject matter and feeling trance like state of her soul. An informative talk 🎂

[@MusicalArmageddon]

her facial expressions indicate her looking at an autocue

[@robertgoss4842]

This is one of the finest talks, on a tough subject, that I have yet heard. Ms. Shears is an extraordinary scientist.

[@henalihenali]

my son shared an office with her at university...

[@jan_phd]

"When you get down to it..." Science right out the door.

[@anthonytkiser8086]

​@@jan_phdif you just knew

[@darthkahn45]

I always get excited when I see a new talk from Tara. Because I know i won't get lost.

[@btfranco2919]

Tara is such a great speaker, makes physics sound interesting and understandable. Unlike so many other Phycists.

[@Zarah777]

Thanks for the upload!

[@MrJdsenior]

I'm an engineer, and thus likely have more knowledge of, and insight into the physics she is talking about than the average layman. I want to say I learned a few new things here. This gal gives one of the best talks I've seen on this subject, especially for the layman. She explains things in a very simple manner, and yet covers them to a level deeper than many more complicated talks I've watched. A fine presenter, and presentation, IMHO.

[@cschu879]

God......

[@arfiantrionohartoadi1784]

@@cschu879 your comment is an excellent example of what is called 'god of the gaps'... 😆

[@jhwilly3098]

Her voice should be on GPS nav units.

[@daffertube]

I think it already is.

[@MegaBspark]

@Tony Wilson fatima whitbread

[@MegaBspark]

@Tony Wilson barbera windsor lol

[@ThePrimempua]

@@MegaBspark Carry On style, with her funny cackling laugh, every time you take a wrong turn. 🤣

[@MrPokerblot]

Especially when she says. " If we have a collision"

[@johnmohnacheff2008]

What a wonderful presentation, thank you, I am as confused and humbled now as I was before !!!

[@arlinegeorge6967]

Informative talk. Thank you, bless you. All your dreams come true.

[@jaapongeveer6203]

I am grateful for Tara and her fellow scientists working with the LHC and the discoveries they are making. In a hundred years we've gone from atoms to quarks etc that make up atoms. Its all mind boggling.

[@TheKongShowJapan]

Thank you! I really enjoyed this.

[@igrieger]

Excellent speech!

[@MegaWondu]

Amazing talk!

[@kmacproductions7365]

Very informative.

[@TheKongShowJapan]

Brilliant!

[@jospinvanraat8730]

Fascinating!!

[@michaelhughes1480]

thanks tara

[@Hahapizza420]

This video has 97,000 views. Lindsay lohan interview has 2.4 million views. We're doomed !

[@Buzz_Kill71]

To be honest though, she is one of many scientist talking about dark matter. Among the many videos posted on the subject, the sparse information here makes it less interesting than the possibility of seeing Lohan have a drug withdrawal induced seizure or faint spell....

[@sarojbasnet369]

😥

[@MrSimonw58]

This does nothing to solve the world's problems

[@jospinvanraat8730]

[@KipIngram]

What a wonderful voice...

[@jan_phd]

"When you get down to it..." Science right out the door.

[@christophern762]

The latest discovery about the nature of muons and a mysterious new 5th fundamental force of nature could explain the many points laid in this talk By the way this was a wonderful and a fascinating talk by a person who genuinely loves her work

[@Me-xg5cr]

Very similar outfit to the Liverpool talk Tara. Looking good though. Great talk, enjoyed it.

[@ralphnabozny8494]

everyting is balanced from way out bounceing happy particales of the probability itself

[@jaydmhearne]

It says something about society that this only gets 1,171 views and 25 likes...where did we go wrong?!

[@rubbish9231]

Jake Paul have more views

[@dimitridehouck9506]

This really really scares me. There are video's on KZbin where someone puts his hand in slime that gets over 30 million views!! Or spiderman and Elsa sitting in a couch tasting candy that has over 100 million views. There is definitely something wrong with society.

[@SourMech]

I don't think it matters. It's like finding rare music to a degree. It's a shame that not many know but gladly I'm in a school that enjoys this.

[@cymoonrbacpro9426]

J Hearne This is a Junk Science for simpletons, at its best! This is just pushing feminism.

[@billeib427]

Resist

[@RhettWinthrop-StGery]

Some frequencies do not fall within our perceptual ranges, but that is changing, will change, eventually. Higher levels are more primordial and fundamental too. They involve Higher Frequencies, Lower Densities.

[@lmak7696]

This provoked anxiety. It seems possible that with our limited intellect and the physical limits of what we can investigate, we will never really scientifically understand the universe. analogous to Gödel’s Incompleteness Theorems

[@scottmitchell358]

Bravo!

[@cschu879]

No...God...

[@PrivateSi]

Following the keep it as simple as possible philosophy:::: 1 fundamental core particle type that repel each other. Empty space very strongly attracts cores forming a close packed matrix. Each Planck sized point must hold at most 1 core by the end of each Planck Second but with enough space for 6 point cores.... Some energy starts a core moving. 6 surrounding cores are pulled in (GRAVITY) then spat out as they repel each other forming rays (like an ELECTRIC FIELD) or loops (like a MAGNETIC FIELD). Due to the spatial geometry this could form secondary particles with 3 ins or outs at each pole and 6 ins or outs at the equator. These particles are like magnifications of the core particle with 2 CHARGES (+ve / -ve). The lost core forms another secondary particle with each movement requiring a core in front to swap with the moving core - this also looks like GRAVITY. Tertiary particles can form from groups of secondary particles orbiting each other or joined to each other and/or/by transferring moving cores (core streams) between each other. When a particle moves all points in front must be moved backwards. This forms streams from in front to behind as only 1 core per point is possible forming another field around the particle. GRAVITY is movement of space (cores) towards particle centres dragging other particles.... I'd love to know from a qualified person if this model is possible. It seems to fit quantum physics well.

[@CommonSenseFishing209]

Wonder what you get if you smashed other particles instead of photons? Also what if you could loop a second Hadron collider in with the first to smash together the new elements made by the first collider, ie smashing together the higgs boson particles or neutrinos etc, would you get even smaller newer particles?

[@pierremontz2628]

What are the methods that the Hadron collider use In order to test these theories is what I’m concern about.

[@tonygadaleta7446]

Not intending to rubbish scientists in any way for they have always been my favourite people including my grand daughter of whom I'm immensely proud but when I learned as a species that we only understand 15% of everything we perceive many years ago I was cool with that though somewhat judgmental of our slow progress though confident our understanding will increase particularly if more women like Tara Shears take up the challenge

[@Jim007baker]

A very lucid lecture on a perplexing subject. However if so many brilliant people have studied for so long and they can not find evidence of their theory then maybe the theory is wrong.

[@richardmason902]

Dedication.

[@Quantumdemetrio]

This woman is extremely attractive. I think I just love science and that makes her so beautiful, but even if she wasn't so brilliant she would still be amazing...

[@roselotusmystic]

StuffStory ~ BOTH the stuff of Story AND the story of Stuff 🙏

[@nicolasbrown8541]

CREATING QUESTIONS,PROBLEMS ABOUT ANYTHING TO KNOW THE UNKNOWN IS CREATING ILLUSIONS N HALLUSINATIONS

[@flesh140]

My gosh, Tara Shears intelligent + attractive. The best two qualities combined.

[@Raydensheraj]

Flesh_Bag I don't see where she is attractive...lots of make up and goofy clothes plus her Hair looks bad. But she makes a great teacher.

[@MatteNoob]

Her forced positivist and enthusiasm over the subject makes it barely watchable, and I can't help but think she learned the technique from some $.49 book bargain at Walmart. I loved watching Steve Jobs, not because I was interested in Apple's products, but the man was an epic communicator.

[@jasonsage1417]

I Think she is very Pretty. :)

[@Raeat]

Seriously? People are arguing about how pretty she is? Is that what you took from this talk. How pathetic.

[@3lapdog637]

I wish I could sit with an astro physicist for about 29 minutes... and share my hypothesis

[@ronaldmorgan2626]

I imagine that if our universe were placed inside a swimming pool, but we couldn't see the water, the resistance of everything against the water would keep the galaxies from spinning apart. I knew it, we're in hot water!

[@vikistanton]

This is the universe in which Tilda Swinton becomes a quantum physicist

[@primovid]

The key thesis is at 14:15 - 15:00

[@ronhoffstein8142]

Unusually talented professor presenting a subject that is way too deep for me. What gets my attention more though is, how can we modulate or moderate gravity and or time? Are all of these phenomena part of the other? This new challenge of Dark Matter awaits a solution to the old ones - maybe.

[@penmerch2804]

Her sounds like Jenny Agutter

[@atypocrat1779]

Why does space time need to be fixed

[@Dr.TJ1]

My prediction is that dark matter won't ever be identified as a fundamental particle. My idea is that dark matter is an attribute of space-time itself. The reason I say this is because we don't understand space-time other than we know that it can be warped by matter, which means it's not nothing. We need to be to understand what space-time really consists of and then we'll discover what dark matter is.

[@srikkanthank]

"We know nothing. Now you are up to speed" - Pink Panther

[@Capetown2233]

When the universe expands so much that the matter in the universe becomes plack size , we have the Big Bang! The universe does not have end at 10^10^100 . Because of it accelerated increase . Plack size is quite soon .

[@martinscott3721]

why do those chairs look so comfey?

[@sergioferragut]

Wonderful TED talk! Thank you. One of the things that caught my attention was that Tara first mentions dark matter as having to be 75% of everything to explain the phenomena we see. This would indicate that it is quite common. But later when talking about the LHC experiments and the possibility of finding dark matter, she refers to it as extremely rare. Why the contradiction? I'm probably misunderstanding something. From a layman's point of view, it seems that if we need 75% of something to explain the error in our theory (and we haven't even started with Dark Energy yet), then we need to consider the possibility of the theory/model just being wrong.

[@gregnewsom447]

Is she related to Billy Shears? It is ironic she is the first physics professor at Liverpool U and her name is Shears! Maybe she"s Paul's sister. I watched this presentation just to see if she addressed that...

[@ernstboyd8745]

She said that the blue area of the bullet cluster is the dark matter and that it cant be seen but the stars should be there because they would not be affected by the collision like the gas is. The gas should be seen in the infared but why arnt the stats in the blue area ???????

[@Chacarruna]

I have a wee, serious question, if dark matter makes 80% of the universe, why do we need to look so far to find it? Granted the universe is big beyond any human concept or imagination, however, what are the odds the sector of the universe where we are is made only of visible matter?

[@astiboy73]

try to collide the beam at -75degC or lower...

[@jamesruscheinski8602]

Interesting comment that dark matter could be a dimension not seen? If could measure for time in future dimension, might have something to do with dark matter?

[@RhettWinthrop-StGery]

Dark matter may well represent higher levels we cannot perceive, see? I give her a thumbs up for thinking too.

[@cschu879]

God....

[@cullendunham7946]

Her voice would make a great siri

[@geoffreywilliams7705]

It almost seems to me that this lady is selling something. Astronomy at this level is really just an academic persuit.

[@GerryDT]

I have input

[@happyhugs]

I've solved it ! - Apparently, dark matter... is just a matter of opinion ;) :) - Great talk, thank you for uploading ! :)

[@patarnababan6440]

hahahaaa...very funny

[@aaronwilder2775]

are dark matter and anti matter the same thing, and it just goes by two names? This question has been recently on my mind.

[@Docchop1000]

Aaron Wilder Nope. They are Two very different things. Antimatter is similar to ordinary matter. Antiparticles(particles of antimatter) have the same mass as ordinary particles, but they have the opposite electric charge. So where ordinary matter has electrons(-) and protons(+), antimatter has positrons(+) and antiprotons(-). Though we don’t know everything about antimatter, it exists. Dark matter is the name ascribed to some as of yet, unknown unobservable substance of our universe that seems to exist, though we cannot see it. For example in the talk she explained that based on our knowledge of mass and gravity, the observable amount of mass and therefore degree of gravitational pull of galaxies is far far far too small to account for the galaxy staying together. Essentially, there is some huge amount of gravitational energy apart from what we can observe, that is allowing for galaxies to stay together. If galaxies had only the mass which we can see, all of the stars and bodies within them, would fly off. Dark matter is that stuff that we can’t see; it is the unaccounted for mass in that situation, or so many think. Dark matter might exist, and many would argue that it does, but it’s very hard to get hard solid evidence of it due to it’s unobservable, unknown nature. Tl;dr Antimatter: particles/matter with the opposite electrical charge Dark matter: Stuff we think might exist because it would explain some other stuff that doesn’t add up; we really aren’t at all sure, but it would be super convenient if it is in fact a thing.

[@aaronwilder2775]

thank you for explaining it for me :)

[@lazy-finger2027]

It means it is like protons are rotating around electrons means nucleus is made up of electron

[@happyhugs]

If you believe in string theory, and thereby other dimensions, could dark matter simply be gravitational forces from other galaxies slightly apart from ours - maybe even offset from ours in time ? i lknow it sounds way out there :) but as far as i see it, the facts about dark matter is simply not yet understood, which opens up for basically any theory....i hope it will be undestood in my lifetime, 'cos i would love to know :)

[@dadsonworldwide3238]

I just wonder if the solar winds dont blow enough that whatever particle it is actually dont come inside the galaxy . qauntom inhertia theory would explain away dark matter but it hasnt been proven trie or false. instead of string theory maybe its rubberband thoery and entangled particles are actually connected but we dont see the connection in our dememsion.

[@manshuvkafle6392]

I didn't understand !

[@tonyurias5041]

Me

[@michellelewis3063]

if its so hard to disprove, is it not a pseudo-science? What value is it? Does it help prevent the 6th mass extinction? Does it help us move towards an equitable world? Or is it yet more 'progress' to be enjoyed by the few at the cost to the many?

[@clavo3352]

At 15:44 "Experimentlium seeable" or is it "Experimenti unseeable"? Chalkboard Lady chalkboard! Plus your omitting the possibility that Dark Matter is a resulting force of the other forces.

[@rayagoldendropofsun397]

Experiments and new ideas is the way to go, hopefully they will abandon dark matter and the mythical Gravity .

[@cschu879]

God...

[@08wolfeyes]

She talks about measuring galaxies by their light which of course makes sense and they are able to tell how many stars in any given galaxy. Do they however take into account the size and weight of all of those stars as i would think that very important to their calculations? Stars, planets etc have of course different sizes and made of different materials, so of course, differing each in weight which makes a difference when making such calculations.

[@ronaldmorgan2626]

Probably just an average. :)

[@FadingFires]

Professor Jules

[@gyro5d]

Dark matter is in Counterspace. Dark energy is the Inertial plane.

[@kamaljeetdogra2159]

The colliding clusters of galaxies are 3.7 Bly away. You cannot see their stars. The bright spots are galaxies, not stars. There are a few visible stars but they are in the foreground in the Milky Way

[@gswiftgs23]

Within the parameters of being human ;-) here today gone tomorrow

[@Unpluggedx89]

She sounds like a cross between Brian Cox, Tilda Swinton and Google Voice

[@MrNelliboy]

She even looks like Tilda Swinton

[@SonicPhonic]

14:10 Question: if Dark Matter comprises 85% of the Universe, how could the particles be rare?

[@kattiek5758]

@Michael Gfroerer not that they are rare in general but because they are rare to be prodused at this location of the universe by this specific method. it's like in some countries mangos are rare, not because they are rare in general but because they need a different climat to grow in comparison with another countries with a warm climat that there are plenty of mango trees growing. It's kinda how i understand it🤷‍♀️

[@mohit5496]

@@kattiek5758 you are right

[@victorliendo2010]

That's a wrong number to my understanding. 70 pct Dark ENERGY, 25 pct Dark MATTER, 5 pct of BARIONIC matter...of course these are ballpark estimates. Anyway, what is rare is what we can see

[@msbee2896]

Are we only 15% of the electro spectrum, or is this spectrum only 15% of the universe?

[@colzaakacanon608]

hi tara my name is zaaka my question is what place would be good for GOD to hide from man after creation?

[@moyshekapoyre]

inside of you, where you'd never think to look.

[@stevefromsaskatoon830]

Inside his work boots

[@mustmake145]

Top 5: under the bed, in the closet, in the fridge(pro level), behind the couch, behind the shower curtain

[@cschu879]

God gas....there I just solved the mystery. Any questions... didn't think so...Amen

[@cschu879]

God...

[@davepangolin4996]

A great deal of TED talks are shite but this one is nearly a 5/10

[@arindamchak]

If you consider the universe as a simulation you can be able to grasp it.

[@ronaldmorgan2626]

Or, the dark matter is the agar in our particular petri dish.

[@germanboy5392]

Pretty

[@markcampbell7577]

The dark matter is the planets and astroids of galaxy. Why they don't say that is a mystery.

[@markcampbell7577]

All of the suns in a galaxy are protons only... The matter outside of the suns are composed of protons, neutrons and electrons. A sun does not have neutrons and electrons. These are from probes of the sun. When we are looking at other suns in terms of atomic spectrum we are seeing atomic signatures outside of the sun.

[@gravyboat2370]

Dark matter ...........is it actually there !!

[@1234TokyoJohn]

It’s all dark.

[@themichaelcantrellband1516]

Being Norwegian myself, I want to thank the Norwegians that made me, and offer my genius, like this fine young Norwegian woman to the world. We're not lazy low lying Swedes, or barnyard quarreling Germans and didn't the Danes flay their most famous statesman?????? Nuf said.

[@malcolmwhite3479]

Looking at the galaxy that is 3.5 million light years away - "it shouldn't be there; it should have flown apart by now" Well, at 3.5 million light years away, you're seeing it as it was 3.5 million years ago. HOw do you know it is still there? Maybe it did fly apart 2.5 million years ago, or 1.5 million years ago. Basing your theories on what you can now see in the past might not reflect what is the situation today.

[@roselotusmystic]

96% 'Dark' Story 🥱

[@1959Berre]

How can dark matter be rare if 85% of it makes the universe?

[@ManyHeavens42]

Are the people in charge of you selling your future or are you in charge of yourself,you can be !

[@captainchaos3053]

so let's see, we measured the speed of a spinning galaxy at an estimated distance and found it didn't match what we gusset it might be so it must be caused to be different than our unqualified figures because of some other thing we can't prove exists? OK you believe that but not leprechauns? let's face it she says she doesn't understand it herself

[@jars_of_jam]

if you knew anything about centripetal forces, gravitational force and mass maybe you'd understand. But good effort...

[@captainchaos3053]

Joaquin Rios Oh I understand the theory but just don't believe the numbers produced based on an unmeasured quantity in a suposed system to be all that dependable.

[@jars_of_jam]

Basically, for the mass that we can detect in that galaxy, its spinning way too fast. We know how to measure the speed of rotation, the mass needed for that speed is calculated to be much higher than what we detect.

[@dylanwilson4313]

Brian Cox's wife?

[@jazzmaan707]

I like when she says, "We've been looking for Dark Matter, and still haven't found any, but we know it's out there." Just another phd who has to justify her research in order to get funding, or she'll be forced to get a real job. Nothing like slamming protons into each other, shattering them, and seeing what's inside the proton. This method of "seeing" is old. They need a new method to see into the Proton. I even mentioned it to my quantum physics professor, saying "You can only slam the wrist watch into the brick wall so many times, and increasing the speed of the slamming into the brick wall is not going to yield anything knew. He mentioned that so far, that's the only way they could think of looking into what pieces make up the wrist watch.

[@lazy-finger2027]

I think dark matter is form due to the reaction between matter and anti-matter

[@nfazal4065]

All dark matter theories are based on gravity,what if the gravity breaks down near the dark matter and some other forces take over. Different interpretations of Einstein and Newton gravitational forces.

[@papinbala]

DocMataaaa

[@RhettWinthrop-StGery]

I am a biologist, ekderly, and no longer think the exact same elements we are taught about are the sole ones, found everywhere, no exceptions. So, I say that is a wrong idea. Higher levels we will visit eventually have more elemental variety...

[@sethrichards4297]

Has anyone here considered that the cause of this might be Isaiah 40:26? That it is God holding the Universe in its place. "Ever learning, and never able to come to the knowledge of the truth." 2 Timothy 3:7

[@jon782]

isnt it peculiar how much dark matter sounds like god. How much it sounds like a religious person explaining god to an atheist.

[@rubenyoung812]

VIPKID Vault no revision to God. He's the same yesterday, today and forever. From the old to new testament God is the same. He may change in other religions, but that's because they don't know the true God

[@markgillespieband]

Not as peculiar as a believer using technology that couldn't possibly exist in the biblical universe, to express his/her unbending opinion. Oh I forgot, the fossils were put there as a test.

[@teachermichaelmaalim6103]

Please respect other people's religions; dark matter and Big Bang are religious beliefs not science.

[@markgillespieband]

Teacher Michael Maalim, since when is a hypothesis based on observations a belief?

[@teachermichaelmaalim6103]

It is called dark matter because it has not been observed. I respect other people's religious beliefs. I respect the religious beliefs of any person who believes that dark matter has been observed. I am a dark skinned man. I know what it means to be unseen.

[@donk1822]

Please tell me she was giving a talk to 5 year olds. She has no more idea about dark matter than my old PE teacher, if she did she would have said, it likely is a blind alley. Physics has become another Zombie science.

[@givorget9658]

Ugh, she just needs to do some iboga and just ask

[@RhettWinthrop-StGery]

i am a biologist, elderly, and no longer think the exact same elements we are taught about are the sole ones to be found, everywhere cosmically. In higher levels which we do not perceive, there are further elements,,, A more expansive previous comment was deleted, fyi.