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[man] A professional domino
artist is someone

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who can set up thousands and thousands
of dominoes

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to create structures, patterns, images.

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[narrator]<i> In 2017, Steve Price led a team</i>

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<i>that built a domino display</i>
<i>of more than 76,000 pieces.</i>

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<i>Smashing a Guinness World Record.</i>

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[Price] You can build
flat on the ground two-dimensional,

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or you can also do 3-D structures
like pyramids and walls

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and make certain
sort of curves and spirals.

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[narrator]<i> And his YouTube videos</i>
<i>get millions of views.</i>

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[Price] The pleasure of watching
the dominoes toppling

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just comes from knowing
how much went into the project.

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As the viewer, you get to just watch it
all fall into place.

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[narrator]<i> Humans love looking</i>
<i>at all kinds of things.</i>

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<i>Why are millions of people watching</i>
<i>videos of cookies getting iced?</i>

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<i>Or enjoy looking at a collage made up</i>
<i>of 21 cutout images of pimples?</i>

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<i>Others like Gothic churches,</i>
<i>horses, synchronized swimming,</i>

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<i>and of course, other people.</i>

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<i>Where do these preferences come from?</i>

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<i>And why is beauty something</i>
<i>we seek at all?</i>

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[man]<i> Art is an individual</i>
<i>creative experience.</i>

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<i>The greater the knowledge one possesses,</i>
<i>the greater will be the experience.</i>

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<i>Many photographers owe</i>
<i>their success to specialization.</i>

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<i>It might be still life, </i>

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<i>babies, animals, or fashion.</i>

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The Earth, I'm afraid,
is in a class by itself.

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[laughs]

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[man]<i> The placement</i>
<i>is exact and symmetrical.</i>

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<i>Exactness in details helps in giving</i>
<i>the final impression of perfection.</i>

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[narrator]<i> For thousands of years,</i>
<i>philosophers have tried to explain beauty.</i>

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<i>Aristotle said, "Beauty depends</i>
<i>on magnitude and order."</i>

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<i>Confucius said, "I have not seen one</i>
<i>who loves virtue as he loves beauty."</i>

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<i>Kant said, "The beautiful is that</i>
<i>which pleases universally,</i>

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<i>without a concept."</i>

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<i>In the Renaissance,</i>
<i>the seeds of an answer were planted</i>

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<i>when an Italian mathematician named</i>
<i>a number the Divine Proportion</i>

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<i>in a book illustrated</i>
<i>by Leonardo da Vinci.</i>

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<i>Mathematicians have been fixated</i>
<i>on this number since ancient times,</i>

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<i>because it kept coming up in geometry.</i>

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<i>In the 1800s, a German psychologist</i>
<i>decided this number</i>

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<i>was the universal law of beauty,</i>
<i>and today it's known in popular culture</i>

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<i>as the golden ratio,</i>
<i>with people claiming to find it</i>

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<i>in all kinds of human masterpieces</i>
<i>all over the world.</i>

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<i>But, there's a problem with that.</i>

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When people have tried
to study it directly,

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it's not so clear that everybody responds
specifically to the golden rectangle.

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[narrator]<i> Study after study</i>
<i>has found little evidence</i>

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<i>that people</i> <i>are especially drawn</i>
<i>to rectangles with this exact proportion.</i>

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<i>We do like rectangles though.</i>

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<i>It's the best flowing configuration</i>
<i>for images from plane to brain.</i>

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<i>As in, the fastest shape</i>
<i>our brains can process.</i>

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<i>Pleasant to look at</i>
<i>because it's easy on the eyes.</i>

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<i>And many scientists today</i>
<i>believe the reason for this</i>

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<i>boils down to survival.</i>

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<i>More than 150 million years ago,</i>
<i>dinosaurs dominated the Earth.</i>

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<i>But to understand</i>
<i>how humans see the world,</i>

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<i>you have to look down</i>
<i>at the dinosaur's feet.</i>

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<i>That's where our ancestors,</i>
<i>small shrew-like mammals,</i>

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<i>spent their time and they had</i>
<i>a pretty dim view of the world.</i>

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<i>They perceived just two colors:</i>
<i>blue and red.</i>

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<i>They were also nocturnal to evade</i>
<i>their better-seeing predators</i>

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<i>and constantly scanned</i>
<i>their environment horizontally.</i>

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<i>And that may be the simple reason we make</i>
<i>so many things in that shape today.</i>

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<i>Visual beauty is based in vision,</i>
<i>of course,</i>

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<i>and our vision evolved</i>
<i>because it helped us survive.</i>

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<i>When the dinosaurs went extinct,</i>
<i>our ancestors came out into the light.</i>

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<i>And over time, their eyes developed,</i>

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<i>opening up all the colors of the rainbow</i>
<i>we know today.</i>

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<i>And many things</i>
<i>we're still visually drawn to</i>

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<i>are things that helped</i>
<i>our ancestors survive.</i>

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<i>Flowers indicated that something</i>
<i>might turn into fruit.</i>

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<i>Water sources signal</i>
<i>the possible bounty of nourishment.</i>

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<i>And places of refuge</i>
<i>helped us evade predators.</i>

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<i>We still like landscapes that resemble</i>
<i>where early humans evolved.</i>

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<i>Two artists conducted a survey</i>
<i>in the 1990s,</i>

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<i>to find the most desirable painting</i>
<i>in 14 different countries.</i>

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<i>They asked questions, like...</i>

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<i>"Would you rather see paintings</i>
<i>of outdoor or indoor scenes?"</i>

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<i>"Which one, if any, of the following types</i>
<i>of outdoor scenes appeals to you most?"</i>

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<i>and "Would you say</i>
<i>that you prefer paintings</i>

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<i>in which the people are nude</i>
<i>or fully clothed?"</i>

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<i>The resulting painting looked like this</i>
<i>in the United States.</i>

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<i>In France, like this.</i>
<i>This was Turkey's. This China's.</i>

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This is sometimes referred to
as the African savanna hypothesis,

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because savanna's have those properties.

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[narrator]<i> Blue skies,</i>
<i>a sheltering rock of some kind,</i>

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<i>something edible growing</i>
<i>in a big sweep of water.</i>

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<i>Turns out,</i>
<i>we're terribly unoriginal creatures.</i>

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<i>Part of beauty is just a desire to live.</i>

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[chirping]

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<i>But not everyone's sold</i>
<i>on some kind of explanation for beauty.</i>

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I think scientists have been misled,

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by the fantastic experience
of explaining something,

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to think that those kinds of explanations
have broad power.

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[narrator]<i> In 2017,</i>

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<i>Richard Prum published a book</i>

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<i>that caused a stir</i>

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<i>in the world of evolutionary biology.</i>

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<i>In it, he argues that not all beauty</i>
<i>is about survival or fitness.</i>

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<i>Some of it is arbitrary and even useless.</i>

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<i>Take the tail of the peacock...</i>

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[Prum] The tail is covered
with hundreds of beautiful eye spots,

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each one of which includes
four or five different colors

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created by optical nanostructures
in the feathers

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that are made up of melanin granules

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organized in a crystalline fashion.

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[narrator]<i> Female peacocks,</i>
<i>they're actually called peahens,</i>

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<i>are drawn to these tails.</i>

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During courtship display,
a male peacock erects his tail

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and creates a huge sort of hemisphere

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that suspends
over the female as he displays.

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[narrator]<i> But the tails are heavy</i>
<i>and make it harder</i>

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<i>for the male peacocks to run and fly.</i>

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<i>Their beauty, essentially,</i>
<i>is bad for their survival.</i>

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[caws]

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<i>This even stumped Charles Darwin</i>
<i>as he wrote in a letter to a colleague.</i>

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[Prum] "Whenever I gaze at a feather
from the tail of a peacock,

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it makes me sick!"

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He was troubled by the fact
that adaptation by natural selection

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could not describe the evolution
of ornaments that would not help

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in the struggle for survival.

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He proposed the theory of sexual selection
and what he was hypothesizing,

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was that mate choice is really about
the subjective experiences of animals.

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[narrator]<i> And it's not just the peacock</i>
<i>that has seemingly unhelpful ornaments.</i>

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<i>There's the flame bowerbird</i>
<i>and his waving cape.</i>

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<i>The sage grouse</i>
<i>and his inflatable yellow chest.</i>

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<i>The great frigatebird</i>
<i>and his ballooning red throat pouch.</i>

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<i>The shoebill and his bill</i>
<i>that looks like a shoe.</i>

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[Prum] So, there aren't any birds
in the world today

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that don't exhibit the radiation,

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the elaboration,
the diversification of preference.

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It's about pleasure.

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Pleasure is the motivation that drives
the choices that animals make.

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[narrator]<i> In the human brain,</i>
<i>that's what beauty is: pleasure.</i>

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[Chatterjee] So our view, is that
the combined activation of visual cortex

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and these reward systems together

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is the biologic signature
of our response to beauty.

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[narrator]<i> Three main</i>
<i>neurotransmitter systems are involved.</i>

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<i>First, the dopamine system.</i>

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The dopamine system seems to be
about our desires and our wanting things.

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[narrator]<i> A surge of dopamine</i>
<i>can literally move us.</i>

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It is what motivates us to approach
things that we find attractive.

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[narrator]<i> Beauty can also activate</i>
<i>our</i> <i>endocannabinoid and opioid systems.</i>

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<i>The same systems that are activated</i>
<i>by consuming cannabis or opioids.</i>

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They seem to be
the core experience of pleasure.

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[narrator]<i> But peahens evolved</i>

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<i>to find pleasure</i>
<i>in the same kind of peacock tail.</i>

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<i>Explaining all the pleasure</i>
<i>humans get from beauty is harder,</i>

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<i>because we don't all agree.</i>

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<i>It was once a sign of beauty in Japan</i>
<i>to dye your teeth black.</i>

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<i>It was once a sign of beauty in Europe</i>
<i>to pluck out all your eyelashes.</i>

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<i>In America today, some consider it</i>
<i>a sign of beauty to stain, spray,</i>

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<i>mist, burn, or mousse your skin bronze.</i>

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We humans are deeply cultural creatures.

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We're influenced
by our social environment,

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and we take variation in that environment
and we incorporate it into ourselves.

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Aesthetic preferences are established
psychologically through development,

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through exposure,
and through individual innovation.

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[Stoller] Of course,
we're all kind of culturally conditioned

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depending on our context.

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But, I think I'm always trying
to ask myself,

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"Why do I think that?
Where does that come from?"

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[Price] The culture of domino art
is definitely based around the internet.

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There is a very big niche community
for people who enjoy this sort of thing.

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One hundred fifty years ago,
impressionist paintings,

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they had a hard time
breaking into the scene.

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Now, if you survey most Americans,

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people tend to say
they like impressionist artwork the most.

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Our brains haven't changed in 150 years,

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and yet these kinds of population-based
preferences have changed dramatically.

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Right? So, that has to be
from what we're exposed.

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[narrator]<i> Take color.</i>

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<i>In the USA today,</i>
<i>pink is often associated with young girls.</i>

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<i>But it 1927, when Time magazine surveyed</i>
<i>ten major American department stores,</i>

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<i>half said pink was the color for boys.</i>

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<i>That shift happened</i>
<i>over the following decades.</i>

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<i>Thanks in part,</i>
<i>to toy marketing campaigns in the 1980s.</i>

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I love you, My Little Pony.

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[narrator]<i> And dark yellow.</i>

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<i>One study found that babies' eyes</i>
<i>linger the longest on this color.</i>

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<i>But adults around the world</i>

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<i>consistently rank</i>

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<i>this as their least popular color.</i>

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<i>A leading theory is that as we grow up,</i>

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<i>we learn to associate this shade</i>
<i>with unpleasant things.</i>

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There are complicated ways
in which our experiences, our education,

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and also the structure of a society

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can have an influence
on what one regards is attractive.

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You can look at a painting of a monarch

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and just be amazed
at the opulence or the beauty.

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On the other hand, if the whole notion
of monarchy is disturbing to you,

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then you're not going
to find it beautiful.

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How to get a sense of what certain people
find satisfying is really hard,

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which is why scientists

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generally tend to focus on the things
that most people get pleasure out of.

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[narrator]<i> There isn't robust research yet</i>

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<i>to explain why some people</i>
<i>see beauty in this...</i>

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<i>or this...</i>

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<i>or this...</i>

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<i>But researchers studying the brain</i>

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<i>during moments</i>
<i>of peak aesthetic experience</i>

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<i>believe they may have found a clue</i>
<i>in an area of the brain called the DMN.</i>

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The DMN is the Default Mode Network.

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So you can almost think of it
as the idling state of the brain.

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[narrator]<i> In brain scans</i>

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<i>when people are asked to do</i>
<i>a task or think about something specific,</i>

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<i>this area of the brain quiets down.</i>

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<i>The DMN actually lights up</i>
<i>when we aren't doing a specific task</i>

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<i>and our minds turn inward.</i>

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They probably reflect
a kind of internal state,

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when you're kind of spacing out,
when you're mind's wandering,

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when you're self-reflective.

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[narrator]<i> In a few recent experiments,</i>

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<i>people were presented</i> <i>with images of art</i>
<i>from a variety of cultural traditions.</i>

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<i>And something surprising happened.</i>

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<i>The DMN region in their brains lit up.</i>

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<i>But, only when they were looking</i>

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<i>at the paintings</i>
<i>they said moved them the most.</i>

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It is triggering
a whole set of associations

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and thoughts in our own brain,

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which is a kind of free play
of our own imagination.

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[narrator]<i> The researchers</i>
<i>believe this is evidence</i>

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<i>that our experience of beauty</i>

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<i>involves connecting our senses</i>
<i>and emotions with something personal.</i>

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<i>Our sense of self.</i>

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There's something
about being moved by paintings

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that forces us to be self-reflective.

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That may be the biologic signature

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of what it means
to feel moved by a painting.

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[narrator]<i> Which could help explain</i>
<i>why we're draw to and moved by</i>

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<i>the same kind of images,</i>
<i>even as our memories slip away.</i>

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There's been research that suggests
that people with dementia

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continue to have the same taste in art

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as they had all their lives.

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<i>In an experiment from 2008,</i>

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<i>20 people with Alzheimer's disease</i>
<i>were shown a range of paintings.</i>

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<i>Some were representational,</i>
<i>like "People in the Sun" by Edward Hopper.</i>

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<i>Some, less so,</i>
<i>like Picasso's "Weeping Woman."</i>

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<i>And others were totally abstract,</i>
<i>like "Composition" by Mondrian.</i>

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<i>The patients were asked to rank</i>
<i>the paintings in order of preference.</i>

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<i>Two weeks later,</i>
<i>they were given the same task.</i>

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<i>When asked to rank the original paintings,</i>

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<i>they put them in largely</i>
<i>the same order as before.</i>

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<i>Our sense of beauty is deep.</i>

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[woman] I thought
that Randy's was beautiful.

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-[applause]
-And she has a great sense of color.

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[narrator]<i> And for people with dementia,</i>
<i>making art can be powerful therapy.</i>

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[woman] I find the color is
the thing that sticks out the most for me.

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Then, the feeling of movement.

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I love movement in painting.

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What else do we see in here?

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[woman 2] I see the sun.

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I have Lewy body dementia.

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And for me, it was a big shock.
I'm sure it is for everybody.

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We all suffer from memory loss.

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Different degrees depending on the person
and how long they've suffered with this.

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I think that, to the extent we retain
our preferences for certain kinds of art,

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or certain pieces of art,

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it means that those pieces
speak to us in a deep way.

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To me, it's so wonderful
to watch people painting.

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-[applause]
-[woman] Whoo!

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[Mittelman]
Look at their faces. They come alive.

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People with dementia,
as well as the rest of us.

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Imagine a scenario where we were
all wearing exactly the same clothes.

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Every meal had no taste.

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That our houses were all uniform.

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Is that a world anybody
would want to live in?

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The absence of beauty,
the absence of surrounding ourselves

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with aesthetic experiences,

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I think, just makes
for a very impoverished life.

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Perfect.

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[theme music playing]

