Earth gets evacuated after a prediction of the end of the planet.
Did You Know?
Before leaving the doomed Earth, Professor Farnsworth says: "So long, Earth, and thanks for nothing". This is a reference to the "So long, and thanks for all the fish" message left by dolphins when they also evacuated the doomed Earth in the sequel of "Hitchhiker's Guide To Galaxy" book (which hasn't been adapted to a movie as of yet). See more
Fry was approved twice for a pass to Mars, yet gave up his seat to Leela. However, if you look closely, he never got a second ticket (nothing came out of the machine the second time), so he couldn't just give Leela another ticket. See more
Get to the point. What does it say about me, Bender?
Nothing, but it says that a great cataclysm will destroy the world!
The world? That's where I live! See, I told you I was in there.