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> It's possible life evolved many times on earth It's also possible it evolved elsewhere and rode here on a meteor - or was brought here by some other lifeform
by padobson 9y ago
> It's possible life evolved many times on earth
It's also possible it evolved elsewhere and rode here on a meteor - or was brought here by some other lifeform several orders of magnitude more advanced than us, using earth as their own cosmic terrarium.
- Retric 9y agoWhy not both. We could also be descendants of an invasive alien species that killed off all of Earth's native lifeforms. It's good practice to assume the simplest possible solution. However, the full range of the full range of what might have happened is ridiculously large.