Careful scanning of recent Mars rover imagery shows a sentient being. The best explanation for this is that the sentient being or beings have been following around the Spirit Rover for some time, always ducking behind a rock when the cameras swung their way. But this photograph shows a sentient being caught in the act:
What is especially interesting about this case is that we can clearly identify this being as Bigfoot. Compare with this photograph of Bigfoot:
Coincidence? I think not.
(Thanks to Virgil Samms for this tip)