>implying we'll ever colonize other planets
If we can get to the moon, we can get to other planets, so if we can get to Mars which we very much can.
The process of terraforming Mars would take many decades I believe 100 years or within that timeframe to make a suitable atmosphere. And then introducing plant life to mars to produce oxygen.
Mars has many elements needed for life.
There is evidence of water and rivers on Mars.
So colonization of other planets isn't that far fetched.