The Merry Martian

One day, the Merry Martian was quietly eating a red rock on his desert planet surface when he noticed a NASA robotic rover approach from far away.
"Quickly, clones!" he cried. "We must flee!"
Instantly, all the symbiotic little ones that were clinging to him let go and scrambled underground to hide in dark caverns.
As for the Merry Martian, well, he slowly melted into the sandy ground until there was nothing left of him to see.
Many years later, NASA is still looking for signs of life on Mars.