A Random

SCIFI.radio story

Earth transforms into a living canvas for intergalactic graffiti artists who want to plug us into a power grid and use us as living batteries even though they can all do credible singing impressions of Ethel Merman and might be overpowered by a nuclear bomb , but scientists create a new weapon which turns them into weird rocks.
The End.but they die from catching the common cold.
The End.