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We're not going to terraform Mars, but we're doing a good job of venusforming Earth.
(fediscience.org)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
Our bodies are simply not made to leave earth for a long period. It's a lofty goal but completely unrealistic when considering our biology has evolved specifically to live here.
Has no one learned anything from War of the Worlds?
Also, remember how humanity really messed things up when we started colonising other parts of our globe? We brought disease, we murdered and we polluted.