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World 2 · Light and Colour · 9 min · PRO

Where did the red go?

Light fades with depth

PRO · Ocean Deep

World 2: Light and Colour 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.

  • The great night-time commute
  • Glowing in the dark
  • Living under pressure
  • Marine snow
  • Vents in the dark
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

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