At the White House science fair yesterday, US President Barack Obama hopped on a bicycle and pedaled to power a water filtration system devised by Kiona Elliott and Payton Kaar from Northeast High School in Florida that is designed to be used during an emergency — the pair was influenced by the aftermath of the 2010 earthquake in Haiti, the Associated Press reports.

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The president of France's National Research Agency has resigned, according to Nature News.

A senator wants a "right-to-try" provision in the US Food and Drug Administration funding bill, but an ethicist says at Stat News that it would undermine the role of clinical trials.

In PNAS this week: red algae Porphyra umbicalis genome, deep neural network model for sequencing peptides, and more.

The Guardian's Barbara Ellen has tried out some DNA testing services to see whether they provide valuable information.