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The molecular device - just two billionths of a metre across - was able to control eight of the microscopic machines simultaneously in a test.
Writing in Proceedings of the National Academy of Sciences, scientists say it could also be used to boost the processing power of future computers.
Many experts have high hopes for nano-machines in treating disease.
How can people say we don't live in the future when stories like this are starting to become a common place thing?
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