A Random

SCIFI.radio story

Earth is invaded by a swarm of sentient nanobots quiveringMartian talking tomatoes who are friendly but incomprehensible even though they have seen every episode of Firefly who derive their sustainance by the army, navy, air force, space force and/or marines , but scientists create a new weapon which turns them into weird rocks.
The End.but they die from catching the common cold.
The End.