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EXCELLENCE
Excellence Nature
EXCELLENCE NATURE

Oceans, Explained

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LEVEL 1 · 0/3LEVEL 2 · 0/3LEVEL 3 · 0/3LEVEL 4 · 0/3LEVEL 5 · 0/3START
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The ocean from the sunlit surface to the deepest trench, with a submersible you drag down a column of water: five zones of fading light, the Challenger Deep and the Titanic, why the sea is salty, tides and spring tides, a 1,000-year conveyor belt, half the oxygen you breathe, coral reefs and bleaching, glowing animals and life without the Sun, the biggest animal ever, record dives on one breath, and an ocean growing warmer, more acidic and full of tiny plastic.

3h 08m5 constellations
AT THE SUMMIT, YOU WILL BE ABLE TO

01Name the ocean's five zones and dive to each

02Explain why the sea is salty and what moves the tides

03Describe the conveyor belt, the Gulf Stream and El Niño

04Know what corals, plankton and vent life need

05Explain what warming, acidification, plastic and overfishing do

Every lesson of Oceans, Explained

15 lessons in 5 levels, about 3 hours. Level 1 is free.

Level 1One World OceanFree · 3 lessons
  1. One Ocean, Five NamesKnow how much of Earth is ocean, its five named parts, and which is biggest.12 min
  2. Layers of LightDive through the ocean's five zones and know where sunlight ends.12 min
  3. The Deepest PlacesKnow how deep the ocean is on average, at its deepest, and how little of it we've seen.13 min
Level 2Water in MotionMembership · 3 lessons
  1. Why the Sea Is SaltyKnow where the ocean's salt comes from and how salty it is.12 min
  2. TidesExplain what moves the tides, their daily rhythm, and spring and neap tides.13 min
  3. Currents, Waves and El NiñoFollow the ocean's conveyor belt, the Gulf Stream, wind waves and El Niño.13 min
Level 3Life in the SeaMembership · 3 lessons
  1. The Ocean BreathesKnow how much of our oxygen the ocean makes, and which tiny life makes it.12 min
  2. Coral ReefsKnow what corals are, why reefs matter, and why they bleach.12 min
  3. Light in the DarkKnow why deep-sea animals glow, and how life thrives at vents without the Sun.13 min
Level 4Giants and Record DiversMembership · 3 lessons
  1. The Biggest Animal EverKnow the blue whale and the whale shark, the ocean's biggest animal and biggest fish.12 min
  2. Record DiversSee how deep whales, seals, turtles and squid go, on one dive gauge.13 min
  3. Ocean JourneysFollow the longest migrations in the sea, in miles and in days.12 min
Level 5An Ocean Under PressureMembership · 3 lessons
  1. Warmer and More AcidicKnow how much carbon and heat the ocean absorbs, and what it does to the sea.13 min
  2. Garbage Patches and OverfishingKnow what garbage patches really are, and what overfishing means.12 min
  3. The Ocean TestUse the whole path: zones, depths, motion, life, giants and pressures.14 min
FREE

Level 1 is open.

Membership opens every other level of this path.

See membership
AFTER THE CORE

Keep going where this path leads.

Planet Earth, ExplainedThe rock under the sea · 3h 06m
Understand Climate ChangeWhy the ocean is warming · 2h 54m