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Clouds.
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Have you ever noticed how much people moan about them?
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They get a bad rap.
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If you think about it, the English language
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has written into it negative associations towards the clouds.
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Someone who's down or depressed,
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they're under a cloud.
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And when there's bad news in store,
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there's a cloud on the horizon.
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I saw an article the other day.
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It was about problems with computer processing
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over the internet.
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"A cloud over the cloud," was the headline.
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It seems like they're everyone's default
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doom-and-gloom metaphor.
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But I think they're beautiful, don't you?
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It's just that their beauty is missed
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because they're so omnipresent,
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so, I don't know, commonplace,
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that people don't notice them.
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They don't notice the beauty but they don't even notice the clouds
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unless they get in the way of the sun.
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And so people think of clouds as
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the things that get in the way.
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They think of them as the annoying, frustrating obstructions,
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and then they rush off and do some blue-sky thinking.
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(Laughter)
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But most people, when you stop to ask them,
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will admit to harboring a strange sort of fondness for clouds.
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It's like a nostalgic fondness,
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and they make them think of their youth.
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Who here can't remember thinking, well,
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looking and finding shapes in the clouds
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when they were kids?
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You know, when they were masters of daydreaming?
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Aristophanes, the ancient Greek playwright,
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he described the clouds as the patron godesses
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of idle fellows
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two and a half thousand years ago,
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and you can see what he means.
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It's just that these days, us adults seem reluctant
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to allow ourselves the indulgence
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of just allowing our imaginations
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to drift along in the breeze, and I think that's a pity,
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and I think we should perhaps do a bit more of it.
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I think we should be a bit more willing, perhaps,
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to look at the beautiful site of the sunlight bursting out
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from behind the clouds and go, "Wait a minute,
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that's two cats dancing the salsa!"
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(Laughter) (Applause)
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Or seeing the big white puffy one up there
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over the shopping center looks like
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the Abominable Snowman going to rob a bank.
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(Laughter)
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They're like nature's version of those inkblot images,
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you know, that shrinks used to show their patients
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in the '60s,
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and I think if you consider the shapes you see in the clouds,
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you'll save money on psychoanalysis bills.
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Let's say you're in love. All right?
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And you look up and what do you see?
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Right? Or maybe the opposite.
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You've just been dumped by your partner,
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and everywhere you look, it's kissing couples.
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(Laughter)
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Perhaps you're having a moment of existential angst.
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You know, you're thinking about your own mortality.
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And there, on the horizon, it's the grim reaper.
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(Laughter)
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Or maybe you see a topless sunbather.
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(Laughter)
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What would that mean?
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What would that mean? I have no idea.
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But one thing I do know is this:
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the bad press that clouds get is totally unfair.
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I think we should stand up for them.
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Which is why, a few years ago,
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I started the Cloud Appreciation Society.
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Tens of thousands of members now
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in almost a hundred countries around the world.
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And all these photographs that I'm showing,
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they were sent in by members.
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And the society exists to remind people of this:
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clouds are not something to moan about.
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Far from it. They are, in fact,
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the most diverse, evocative, poetic aspect of nature.
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I think, if you live with your head in the clouds
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every now and then, it helps you keep your feet on the ground.
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And I want to show you why, with the help of
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some of my favorite types of clouds.
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Let's start with this one. It's the cirrus cloud,
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named after the Latin for a lock of hair.
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It's composed entirely of ice crystals
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cascading from the upper reaches of the troposphere,
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and as these ice crystals fall,
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they pass through different layers with different winds
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and they speed up and slow down,
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giving the cloud these brush-stroked appearances,
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these brush-stroke forms known as fall streaks.
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And these winds up there can be very, very fierce.
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They can be 200 miles and hour, 300 miles an hour.
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These clouds are bombing along,
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but from all the way down here,
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they appear to be moving gracefully, slowly,
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like most clouds.
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And so to tune into the clouds is to slow down,
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to calm down.
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It's like a bit of everyday meditation.
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Those are common clouds.
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What about rarer ones, like the lenticularis,
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the UFO-shaped lenticularis cloud?
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These clouds form in the region of mountains.
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When the wind passes, rises to pass over the mountain,
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it can take on a wave-like path in the lee of the peak,
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with these clouds hovering at the crest
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of these invisible standing waves of air,
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these flying saucer like forms,
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and some of the early black-and-white UFO photos
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are in fact lenticularis clouds. It's true.
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A little rarer are the full streak holes. All right?
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This is when a layer is made up of very, very cold
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water droplets, and in one region they start to freeze,
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and this freezing sets off a chain reaction which spreads outwards
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with the ice crystals cascading and falling down below,
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giving the appearance of jellyfish tendrils down below.
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Rarer still, the Kelvin–Helmholtz cloud.
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Not a very snappy name. Needs a rebrand.
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This looks like a series of breaking waves,
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and it's caused by shearing winds that wind
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above the cloud layer and below the cloud layer,
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differ significantly, and in the middle, in between,
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you get this undulating of the air,
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and if the difference in those speeds is just right,
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the tops of the undulations curl over
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in these beautiful breaking wave-like vortices.
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All right. Those are rarer clouds than the cirrus,
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but they're not that rare.
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If you look up, and you pay attention to the sky,
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you'll see them sooner or later,
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maybe not quite as dramatic as these, but you'll see them.
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And you'll see them around where you live.
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Clouds are the most egalitarian
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of nature's displays, because we all have a good,
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fantastic view of the sky.
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And these clouds, these rarer clouds,
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remind us that the exotic can be found in the everyday.
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Nothing is more nourishing, more stimulating
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to an active, inquiring mind, than being surprised,
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being amazed. It's why we're all here at TED, right?
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But you don't need to rush off
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away from the familiar, across the world
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to be surprised.
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You just need to step outside,
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pay attention to what's so commonplace, so everyday,
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so mundane that everybody else misses it.
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One cloud that people rarely miss is this one:
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the cumulonimbus storm cloud. All right?
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It's what's produces thunder and lightning and hail.
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These clouds spread out at the top in this enormous
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anvil fashion stretching 10 miles up into the atmosphere.
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They are an expression of the majestic architecture
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of our atmosphere.
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But from down below, they are the embodiment
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of the powerful, elemental force and power
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that drives our atmosphere.
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To be there is to be connected in the driving rain
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and the hail, to feel connected to our atmosphere.
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It's to be reminded that we are creatures
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that inhabit this ocean of air.
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We don't live beneath the sky. We live within it.
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And that connection, that visceral connection to our atmosphere
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feels to me like an antidote.
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It's an antidote to the growing tendency we have
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to feel that we can really ever experience life
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by watching it on a computer screen, you know,
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when we're in a wifi zone.
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But the one cloud that best expresses
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why cloud-spotting is more valuable today than ever
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is this one, the cumulus cloud.
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Right? It forms on a sunny day.
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If you close your eyes and think of a cloud,
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it's probably one of these that come to mind.
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All those cloud shapes at the beginning,
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those were cumulus clouds.
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The sharp, crisp outlines of this formation
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make it the best one for finding shapes in.
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And it reminds us
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of the aimless nature of cloud-spotting,
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what an aimless activity it is.
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You're not going to change the world
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by lying on your back and gazing up at the sky, are you.
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It's pointless. It's a pointless activity,
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which is precisely why it's so important.
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The digital world conspires to make us feel
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eternally busy, perpetually busy.
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You know, when you're not dealing with
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the traditional pressures of earning a living
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and putting food on the table, raising a family,
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writing thank-you letters,
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you have to now contend with
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answering a mountain of unanswered emails,
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updating a Facebook page,
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feeding your Twitter feed.
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And cloud-spotting legitimizes doing nothing.
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(Laughter)
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And sometimes we need —
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(Applause)
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Sometimes we need excuses to do nothing.
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We need to be reminded by these
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patron goddesses of idle fellows
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that slowing down
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and being in the present, not thinking about
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what you've got to do and what you should have done,
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but just being here, letting your imagination
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lift from the everyday concerns down here
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and just being in the present, it's good for you,
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and it's good for the way you feel.
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It's good for your ideas. It's good for you creativity.
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It's good for you soul.
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So keep looking up,
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marvel at the ephemeral beauty,
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and always remember to live life with your head in the clouds.
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Thank you very much.
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(Applause)