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World 3 · Life Without Sunlight · 9 min · PRO

Vents in the dark

Hydrothermal vents

PRO · Ocean Deep

World 3: Life Without Sunlight is part of PRO

The first world of Ocean Deep is free. PRO opens the other 23 lessons in 6 worlds — simulations, quizzes and all.

  • Marine snow
  • Chemosynthesis
  • Falls and seeps
  • Salt and heat set the density
  • The wind-driven surface currents
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

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