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Species

Appearances and disappearances of species

QuestionAnswer
When have the Earth been craeted? About 4.5 billions of years ago
When have the first continents have been created? About 4 billions years ago
When has the life on Earth appeared? About 3.5-4 billions years ago
When has dioxygene appeared on Earth? About 2 billions years ago
When have the dinosaurs appeared? About 245 millions years ago
When have the dinosaurs disappeared? About 65 millions years ago
Why have the dinosaurs disappeared The real reason is unknow but there is many hypotheses like a volcanic explosion...
When have humans appeared? About 1.7 millions of years ago
When have humans disappeared? On the 25 december 2012.
Created by: Casboule4
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