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This week in PNAS, researchers describe their ultrahigh-throughput screening platform that uses drop-based microfluidics to overcome the limitations of traditional methods employed to measure biochemical reactions. The team applied their method ― which uses "aqueous drops dispersed in oil as picoliter-volume reaction vessels" ― to directed evolution; they identified novel mutants of enzymes.

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Springer Nature announces €9,500 fee to make papers open-access in Nature and its family of journals.

Librarians have concluded that notebooks that belonged to Charles Darwin that were thought to have been lost were actually likely stolen, CNN reports.

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