By placing interleaved comb-like electrodes on the surface of lithium niobate, a material that is piezoelectric (and so expands or contracts as a current is passed through it), Dr Wixforth was able to fine-tune the waves to do his bidding.

ECONOMIST: Acoustic microfluidics

And the other thing is people know who you are everywhere -- obviously. (Laughter.) So you have to -- you always have to like shave and comb your hair and -- (laughter) -- you can't just roll out of bed and be out there. (Laughter.) So that kind of stuff can be a little tough.

WHITEHOUSE: President Obama Unveils his Budget to Win the Future

Short-haired pets like my Lulu benefit from regular grooming sessions with a curry comb, which can help loosen dirt and hair before a bath.

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