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World 2 · Read the Rings · 10 min · PRO

Oldest living things

Bristlecones and clones

PRO · Tree & Forest Lab

World 2: Read the Rings is part of PRO

The first world of Tree & Forest Lab is free. PRO opens the other 20 lessons in 5 worlds — simulations, quizzes and all.

  • How a ring forms
  • Dendrochronology
  • What rings remember
  • What roots do
  • Mycorrhiza
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

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

Unlock Tree & Forest LabTry the free world
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← What rings rememberWhat roots do →

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