3.8 billion years ago
(Cyanobacteria)
First sparks of life
The air was just a fog of toxic vapours:
Carbon monoxide, carbon dioxide, nitrogen, methene, and cyanide.The planet's surface was dotted with tiny islands in a shallow soup of chemicals.
2.5 billion years ago
clearing the air
Single-called "cyanobacteria" microbes in the ocean developed the power of "photosynthesis". Later used by plants, this planet transforming process converts sunlight and carbon dioxide into energy,
creating oxygen as a product.oxygen an important breathable gas for the evolution of a greater variety of life-forms began to increase in Earth's atmosphere.
1 billion years ago
life levels up
The first multicellular life-forms appeared in the oceans. A cell is the basic unit of life; multicelled organisms are made of colonies of cells that specialize in defferent functions.
(Your body is made up of trillions of cells)
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