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 >> Symbiotic communities, every different color is at least two species.
 >> That's amazing how in color they're symbiotic with the rock.
 It's almost as if they take the color from the rock.
 >> So is this not the country where I grew up in places like this?
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 >> Desiccate.
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 >> So is there rock carved here?
 Rock painting on the surface?
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 >> Imagine trying to grow those for firewood.
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 >> Was there ever water gushing down?
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 >> Is the drift wall working further?
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 >> They're going to go to the top of this thing.
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 >> Why don't you know?
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 >> That's crust as a whole.
 It's like the skin of an orange or something.
 Before you peel it, you press it, the whole thing is actually floating.
 >> Right.
 >> So the crust can actually move on the outside of the core or something.
 >> And then there's also the idea of geomagnetic reversal where nothing physical moves,
 but the field reverses polarity.
 And during the time when it's not defined, and nobody knows how long that lasts,
 like six weeks or 6,000 years, but it's a very unusual situation for the Earth.
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 >> What is this going to look like?
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 >> Those are all the birds going the wrong way.
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 >> Are there limestone caves around here?
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 >> Sorry, Gerard.
 I'm in that quintessential next hit stage.
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 >> Is this a straight drop from top to water or in the whole descent of the river?
 >> No, it's from the canyon edge to the river, 6,000 feet.
 >> To go straight down?
 >> Well, not straight down, but country like this where it bluffs and you have huge table things and rivers cut in between.
 >> No good for a bungee then?
 >> No, no, no.
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 >> Skydiving.
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 >> I thought it was massive.
 I didn't conceive it.
 I think it's six.
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 >> The actual length.
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 >> All year round.
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 >> Amazing things that can be driven.
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 >> It's above the water.
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 >> That must be a wonderful sight, eh?
 >> This whole valley is rock.
 And as we go in you'll see that the soil on the rock is only about an inch deep.
 And there's 30 or 40 species of this square meter on this fragile soil layer.
 >> Oh, they get some sort of --
 >> So there's no sea pitch at all.
 And all the water runs straight to the bottom.
 The whole bottom is rock.
 And it goes straight down into the ground.
 >> This is a dream for walking further.
 >> You can walk for as long as you want.
 >> No joke.
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 >> This is me talking to you.
 >> I'm not sure where they're heading to.
 >> No, they're going to go to the top of this thing.
 >> What possibilities are in --
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 >> Why don't you know?
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 >> And then there's also the idea of geomagnetic reversal where nothing physical moves but the field reverses.


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