Natale and his colleagues used DNA microarrays to compare tumors that were hurt by the drug with those that weren't.

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He quickly realised that the technique might come in handy when mixing tiny quantities of different liquids in DNA microarrays, for example.

ECONOMIST: Acoustic microfluidics

Alan Trounson at Melbourne, Australia-based Monash University, a leader in the field, says that even if a cloned baby's genome was checked gene by gene with DNA microarrays such as those made by Affymetrix (nasdaq: AFFX - news - people ), there could be no assurance that the baby would be healthy.

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