The case against the Florida student who was expelled and faced criminal charges over a science experiment has been dismissed, the Associated Press reports. Sixteen year-old Kiera Wilmot's experiment mixed toilet bowl cleaner and aluminum foil in a plastic water bottle, which led to a small amount of smoke and a popping noise.

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In Nature this week: method to detect single-nucleotide and copy-number alterations in single cells from archival tissue, and more.

China has announced new rules governing the use of stem cell treatments, Nature News reports.

Wired's Sarah Zhang expresses frustration as a microbiome study of homes uncovers expected bacteria.

A database containing genome sequences from strains of foodborne pathogens may enable regulators and companies to quickly identify outbreak sources, Reuters reports.