Well, we wanted to find signs of alien life, and now we're being conquered by our new alien overlords. Yet another reason why interaction with the outside world is a bad thing.
In Atari's 1982 space adventure DEFENDER, you are all that stands between the invading hordes and civilization as we know it. Don't worry! We believe in you!*
*Podcaster writes farewell letter to his fellow humanoids.*
Thanks to Kevin McLeod at Incompetech.com for creative commons use of his songs "Reformat", "Pinball Spring" and "Take a Chance."