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Laser makes uphill battle easier

Scientists have etched plates to pull liquid up

If Sisyphus’ punishment involved dragging buckets of water uphill rather than rolling a boulder, science could have helped him out.

Researchers have used a femtosecond laser to etch tiny channels into metal plates, prompting liquid to flow uphill. The work could lead to devices that draw fluid across microchips or coolant through computers, report Chunlei Guo and his colleagues in the June 1 Applied Physics Letters.

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