BBC: Google is testing a "smart contact lens" that will measure glucose levels in tears.
The Atlantic: Two surveys report different average sleep times for Americans and the number of U.S. insomnia diagnoses is more than five million.
BBC: President Barack Obama will order the National Security Agency to stop collecting data from Americans' phones.
BBC: The California company will refund parents whose children made in-app purchases without consent.
The Atlantic: People with low incomes are 27% more likely to be hospitalized for hypoglycemia.
BBC: The U.S. National Security Agency could have used "secret technology" to transmit data from computers not connected to the Internet.
The Atlantic: Statistics show that low-income women often face economic challenges if they choose to stay single.
Reuters: U.S. consumer spending in December rose more than expected.
Reuters: Lawmakers unveiled a spending bill that aims to prevent another government shutdown and boost funding of military and domestic programs.
Reuters: Sexy sports cars are now being outfitted to counter concerns about energy and the environment.
USA Today: Groupon has acquired the flash sales fashion site, ideeli, to expand its apparel sector.
Reuters: Employers hired the fewest number of workers at the end of 2013.
BBC: The retailer says personal data was stolen from 70 million customers — 30 million more than first reported.