Rodney Kelp wrote:

What are the chances that mars was a blue planet hundreds of thousands of
years ago with a thriving advanced civilization. But they became so radio
and laser noisey that some aliens from another part of the galaxy came by
and blasted them to oblivion with planet killer weapons.


No, it was Marvin trying to develop his explosive space
modulator. He was too successful; his experiments in
his lab took out his entire civilization.

:-)