The Earth was formed
The Earth's surface temperature was around 4.54 billion years ago
The Earth's moon formed
The event occurred from about 4.1 billion years ago to 3.8 billion years ago is
One theory for how water came to Earth is
The melting of glaciers during the Snowball Earth period caused
The Cambrian explosion occurred
The Permian-Triassic extinction event caused
The individuals of Homo sapiens existed around 130,000 years ago
The event caused the extinction of 96% of marine species and 73% of terrestrial vertebrate species around 252 million years ago
The current approximate world population is
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