We will eventually go to mars and try to form organic life on it. eventually we will see progress in the life forms that are forming on the planet and evolution will begin to take place. while this is happen something will happen to Earth and it will no longer be able host any life killing every living thing on the planet. Earth will eventually become a desolate planet in space and eventually The people on Mars will discover that there was once life on Earth so they try to farm organic life and the process repeats itself.
Basically we are just a vessel in time and space and we keep creating our own life and our's becomes destroyed along with all the records of the creations.