What Caused the Buildup of Oxygen in the Atmosphere at Roughly

question 41

Essay

What caused the buildup of oxygen in the atmosphere at roughly 2.5 Ga?

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Definitions:

Mass Behavior

Similar behaviors engaged in by large groups of people without their necessarily being in the same place.

Contagion Theory

One of the earliest theories of collective action; suggests that individuals who join a crowd can become “infected” by a mob mentality and lose the ability to reason.

Collective Behavior

Behavior that follows from the formation of a group or crowd of people who take action together toward a shared goal.

Large Numbers

Numerical values that are significantly larger than those ordinarily encountered in daily life or in specific contexts, often requiring special methods for understanding or computation.