0:00 The thick acrylic window of our deep-sea submarine groans under twelve thousand pounds of pressure, and the sunlight simply vanishes.0:11 Pull your chair in closer to the fire, now, pet.0:15 After our trek through the tangle of the Amazon vines with Nora last week, looking up at that green ceiling, today we turned our compass straight DOWN into the Atlantic abyss.0:30 No leaves here, a stór.0:32 Just black.0:33 The kind of black you only find when you leave every beam of daylight a mile above your head.0:42 Whisht now...0:43 listen to the hull creak.0:45 At three thousand feet down, it gets bitterly cold, freezing enough to stiffen your knuckles.0:53 You'd think nothing could breathe down here under all that heavy water, wouldn't you?1:00 But an explorer knows better.1:03 You see, when the sun is gone, the world doesn't end—it makes its own light.1:09 Out of the pitch gloom, a tiny blue spark drifted past the glass.1:15 Then another.1:16 A creature floated right before us, no bigger than your teacup, dangling a glowing fishing pole from its forehead.1:26 An anglerfish!1:27 Her little lamp didn't run on grease or coal, mind.1:32 Inside that glowing tip, millions of microscopic bacteria were dancing, making a cold, blue chemical glow called bioluminescence.1:43 She uses it like a lantern on a dark boreen, luring in curious wee prawns who think it's a treat—right into a mouth full of needle-sharp teeth!1:56 Oh, the cut of him!1:57 We ventured further down, past the territory where the giant squid glides through the quiet, with eyes as big as dinner plates to catch the faintest flicker of spark.2:12 It was grand, truly grand, but our battery dials were ticking down.2:17 We needed to find what lay at the very bottom before the oxygen gauge warned us back to the surface.2:26 Then, right at ten thousand feet, the submarine's sonar began to hum.2:32 Something huge stood on the sea floor, and so — and so the real reason the dials were spinning wasn't rocks at all.2:42 It was heat.2:43 Boiling heat.2:44 Looming out of the freezing dark were giant stone chimneys, three stories high, belching black, mineral clouds straight into the sea.2:56 Hydrothermal vents.2:58 The water pouring out was four hundred degrees!3:02 You'd expect everything around it to be boiled away or frozen stiff.3:08 But wait.3:08 Around those steaming towers lived miles and MILES of white tube worms with crimson heads, ghostly white crabs, and pale anemones, all packed together like a Sunday fair.3:23 There wasn't a single ray of sunshine to feed a plant, yet here was a thriving city of life.3:31 Those creatures didn't need the sun for energy.3:35 Instead, specialized bacteria eat the sulfur bubbling from the vents, turning pure rock and hot water into food.3:45 Scientists call it chemosynthesis.3:48 Life didn't just survive in the pitch black—it flourished.3:53 We turned the submarine's nose back toward the surface, watching the glowing spires fade into the deep.4:02 And that, pet, is the God's honest truth—or near enough.4:07 It taught me that life doesn't always need a bright sunny sky to grow strong; sometimes the greatest discoveries happen where it seems impossible for anything to bloom at all.4:22 Now, the turf is burning low, and it's time for bed.4:27 Off you go, a stór.4:28 Close your eyes, and dream of glowing lanterns in the great, quiet deep.
