The BACTrack Vio keychain breathalyzer and app on the iPhone at NPR headquarters in Washington, D.C. A public health researcher says tools like this could help people make better decisions about alcohol use.
Spain's Alberto Contador eats a banana in as he rides in the pack during the sixth stage of the Tour de France on July 10, 2014. The cyclists aim to eat up to 350 calories an hour as they ride, and up to 9,000 calories a day.
Soylent CEO Rob Rhinehart holds a bag of finished product in September 2013. Rhinehart recently discouraged members of the company's DIY online community from competing directly with Soylent.
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