0:00 The ground beneath your boots is warm.0:03 It’s not the cool, damp stone we felt in the caves last time.0:07 Remember how we followed water dripping deep into the Earth?0:12 Today, we feel the Earth’s heart beating right back.0:16 This isn’t just any mountain.0:19 This mountain is alive.0:21 We stand on its giant shoulder.0:23 Below us, the whole world seems to stretch out.0:27 But the REAL adventure is happening under our feet.0:31 Deep, deep down, the Earth’s crust is not one solid piece.0:36 It’s a giant puzzle of tectonic plates.0:39 And right here?0:40 Two of those plates are pushing against each other.0:44 Imagine two giants, wrestling in slow motion for a million years.0:49 That pushing and grinding creates incredible heat.0:53 Enough heat to melt solid rock into a thick, glowing soup called magma.0:59 It churns in a chamber far below, a sleeping giant of fire and pressure.1:05 The mountain above it swells, just a little.1:08 A deep rumble echoes up through the soles of your shoes.1:13 The giant is waking UP.1:15 Can you feel that?1:16 That’s the pulse of the planet!1:18 The magma wants out.1:20 It pushes up, searching for cracks, for any weakness in the rock above.1:26 This entire mountain was built by that pushing.1:29 Layer after layer of cooled lava, piled up over thousands of years.1:35 Some volcanoes are gentle giants, with lava that flows like thick, slow rivers.1:41 Others are angry mountains that explode with a mighty ROAR, throwing ash and rock high into the sky.1:49 You never know which kind you’re standing on until it decides to show you.1:55 The rumbling grows louder.1:57 It’s not just in your feet anymore; you can feel it in your chest.2:03 A plume of white steam hisses from the peak high above.2:07 Is it going to blow?2:09 Your heart thumps with the rhythm of the rock.2:12 You hold your breath.2:14 Waiting.2:15 Then, you see it.2:16 Not an explosion.2:17 Not a cloud of ash.2:19 A crack opens near the summit, and a line of brilliant, fiery orange spills out.2:25 It’s lava!2:26 It moves slowly, like thick honey, glowing with impossible heat.2:31 It’s a river of liquid rock, building the world right before our eyes.2:37 This isn’t destruction.2:39 This is creation.2:40 We watch the river of fire creep down the slope.2:44 It cools as it goes, the bright orange fading to a deep red, then to black.2:50 Hissing sounds fill the air as it touches patches of snow.2:54 It’s not an angry monster.2:57 It’s an artist.2:58 It’s adding a new layer to the mountain, making it taller, wider, STRONGER.3:04 We are watching the Earth breathe.3:06 This new black rock will one day break down.3:10 It will become soil so rich that forests will grow here.3:14 The islands you see in the middle of the ocean?3:18 Many were born this way, built up from the seafloor by volcanoes.3:23 They are not just mountains of fire.3:26 They are the planet’s builders, its sculptors.3:30 They are proof that even in the most fiery moments, something new and wonderful is beginning.3:37 You didn’t just climb a volcano.3:40 You saw where the world begins.