ARTi

How leaves eat sunlight

Chapter 1

The leaf as a solar panel

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Chapter 2

The magic recipe of air and water

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Chapter 3

The ancient bacteria that changed the world

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Chapter 4

The global engine of life

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YOUR GOAL

Master of How leaves eat sunlight

Ch 3 · The ancient bacteria that changed the world
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teacher How a microbe swallowed a solar factory

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teacher The great oxygen catastrophe

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The ancient bacteria that changed the world

teacher The ancient bacteria that changed the world

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teacher The blue-green inventors of photosynthesis

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teacher Fossilized proof in ancient stone

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teacher Cyanobacteria / Drinking in the light / Making the blue sky!

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How a microbe swallowed a solar factory

teacher How a microbe swallowed a solar factory

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Fun Fact

Stromatolite survival: Living stromatolites still grow today in highly salty bays in Western Australia.

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The great oxygen catastrophe

teacher The great oxygen catastrophe

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Glossary
cyanobacteria (noun)
Photosynthetic bacteria that produce oxygen and are commonly referred to as blue-green algae. These organisms triggered the Great Oxidation Event about 2.4 billion years ago, permanently altering Earth's atmosphere.

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Quiz

According to endosymbiotic theory, what did the ancestor of modern chloroplasts originally start out as?

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Gossip

Would you want to visit Earth during the Great Oxidation Event?

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Quiz

Approximately how many billion years ago did cyanobacteria first begin producing oxygen on Earth?

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Quiz

Which biologist proposed the theory of endosymbiosis in 1967 to explain how chloroplasts evolved?

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Quiz

Which ancient ocean microbes are credited with first inventing the process of photosynthesis?

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Quiz

What are the ancient, layered rock formations built by photosynthetic microbes called?

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Quiz

Where can you still find living stromatolites growing in the modern world?

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Quiz

What is the name of the planetary event 2.4 billion years ago when oxygen first flooded Earth's atmosphere?

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Quiz

Why was the sudden appearance of oxygen on early Earth considered a 'catastrophe' for existing life?

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