[Rain Man]

I read once that it's possible to colonize Venus, and Venus could be a more hospitable place in the long run.

The problem with Venus is that it has a massive amount of carbon dioxide, which produces all sorts of problems. But there are certain types of bacteria that could survive there and that eat carbon dioxide. So you fire a rocket there that's full of those bacteria, wait a hundred years or some such time until they clean the place up, and then introduce oxygen and water. Voila - you have created an inhabitable new world.