Dear world in the future,

I am leaving earth to go to mars. Earth has been invaded by overpopulating animals. There is no more room on this earth and they refuse to share. We are leaving on a rocket called The Hab. It can fit seventeen billion people and has many different resources on board. If you find this message, just know that we will return someday when the robots have exterminated  the unnecessary  amount of living things. We will hopefully see you soon, please keep this as a historical artefact

From,

The people of earth