"Behold!" said Doctor Geisteskrank.
"It's a pile of dirt," said Bartlett. He blinked. "Er... with a hole in it." More holes appeared as he watched, visible through the glass like ant-farm tunnels.
"Quantum moles," said Doctor Geisteskrank. "If subatomic particles can move without passing through the intervening space, then it follows that something must be making the tunnels for them. Quod erat demonstratum."
"So... they tunnel through anything?"
"I notice you've stored them next to the power source for the piranha-bear containment grid."
"Nothing," Bartlett sighed, as the lab plunged into darkness and the alarms began to sound.
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