Once it gets through, it secretes an enzyme into the barnacle and then waits for the acid to turn the poor guy into mush.

BBC: An extreme way to see Wales' coast

He described a hypothetical scenario in which self-replicating nanomachines able to break down biological material could run amok, replicating exponentially and turning terrestrial life into mush.

BBC: Nanomachine "factories" could one day sit on a desktop

Commodities may fall into this mush for the time being.

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