“Why?”
“We’re not sure. But we have a theory, based on their instruments.”
“Instruments?”
“Yes. They stretched animal skins over hollowed-out tree stumps.”
“Like drums?”
“Yes.”
“But what could drums have to do with their demise?”
“We discovered thousands of worn-out and torn animal skins, preserved in the permafrost, all along the border between these peoples. It appears they bombarded each other with noise. At some point, we suspect, they simply couldn’t take it any more.”