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LUISA: There is a very thin layer of highly saline water under the sandy top soil. He was siphoning that off.
CRUSHER: Perhaps somehow that saline water sustained them.
DATA: It connected them.
LUISA: I don't understand.
CRUSHER: The microbrains may be like our own brain cells. Individually, a cell has life but not intelligence. Yet when interconnected, their combined intelligence is formidable.
DATA: The saline fluid is their circuitry, and to prevent its loss, they killed Malencon.