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Species
Appearances and disappearances of species
Question | Answer |
---|---|
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. |