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Employment

When and how to say no

The struggle is real, but the best way to respond is with sincerity

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Start-ups

Moderna, maker of mRNA therapies, files for record IPO

Planned $500 million stock offering will open books of secretive biotech firm to the public


Engineered E. coli scavenges excess ammonia in the gut

Synlogic’s therapeutic bacterium passes Phase I trial


Building a DIY plate reader

Undergraduates design a low-cost instrument for taking spectrophotometric measurements


Brazil eyes new law for agriculture chemicals

Advocates say the proposal would modernize regulation and use of new chemicals; critics worry about human health and environmental impacts