GENEDU 1302 · Gaia: The Earth as a Living System

Led by James Lovelock Simulacrum

Is the Earth alive? Lovelock's Gaia hypothesis tested from Daisyworld to the Anthropocene.

1. Module 1

   The Observation That Started Everything

   Led by James Lovelock Simulacrum

   The question

   A planet with life would have an atmosphere far from chemical equilibrium. Earth has oxygen and methane coexisting — gases that react and should vanish without continuous replenishment. Who or what maintains them?

   Outcome

   The student can state the Gaia hypothesis without the common misunderstandings.

   Sub-units

   1. ○ 1.1 The Mars Thought Experiment Open this unit → ✓ ↻
   2. ○ 1.2 The Hypothesis Stated Open this unit → ✓ ↻
   Begin the course → Print certificate of completion
2. Module 2

   Daisyworld: A Model of Self-Regulation

   Led by James Lovelock Simulacrum

   The question

   Black daisies absorb heat; white daisies reflect it. As the sun warms, white daisies spread and cool the planet. As it dims, black daisies spread and warm it. No consciousness. No design. Just differential growth rates producing planetary regulation. Does this model prove that Gaia is possible?

   Outcome

   The student can explain Daisyworld's mechanism and evaluate what it proves.

   Sub-units

   1. ○ 2.1 The Model Open this unit → ✓ ↻
   2. ○ 2.2 Essay: Does Daisyworld Prove Gaia? Open this unit → ✓ ↻
   Open this module → Print certificate of completion
3. Module 3

   Is Gaia a Scientific Hypothesis?

   Led by James Lovelock Simulacrum

   The question

   Gaia makes testable predictions: temperature stability over four billion years despite a 30% increase in solar luminosity, ocean salinity compatible with cellular life, atmospheric oxygen near 21%. Are these signatures of a self-regulating system — or just a set of individual feedback loops that happen to be life-friendly?

   Outcome

   The student can explain Gaia's scientific controversy and evaluate the evidence.

   Sub-units

   1. ○ 3.1 Scientific or Metaphorical? Open this unit → ✓ ↻
   Open this module → Print certificate of completion
4. Module 4

   The Anthropocene: Has Gaia Met Its Match?

   Led by James Lovelock Simulacrum

   The question

   Lovelock argued the Earth's regulatory systems were robust. He later revised this. The Anthropocene has disrupted systems he thought were self-correcting. Gaia will survive. Humans may not. What is the difference?

   Outcome

   The student can describe climate tipping points in a Gaian framework.

   Sub-units

   1. ○ 4.1 Tipping Points Open this unit → ✓ ↻
   Open this module → Print certificate of completion
5. Module 5

   Gaia, Science, and Metaphor

   Led by James Lovelock Simulacrum

   The question

   Calling it "Gaia" made the idea accessible and easy to dismiss. Would "Earth system self-regulation" have been received differently? And what does it mean to say the Earth is alive — scientifically, philosophically, ethically?

   Outcome

   The student can evaluate the role of metaphor in science and take a defended position on Gaia.

   Sub-units

   1. ○ 5.1 Metaphor and Science Open this unit → ✓ ↻
   2. ○ 5.2 Final Essay: Is the Earth Alive? Open this unit → ✓ ↻
   Open this module → Print certificate of completion