When we think about improving urban food systems, we tend think about growing more vegetables — densely planted backyard plots and community gardens, with tiny tomatoes ripening in the sun. But according to some experts, we should start thinking smaller — way smaller — as in bugs.

Update at 5:58 p.m. ET. Lawsuit Dismissed:

A federal judge dismissed a lawsuit filed by Lance Armstrong that sought to stop a USADA hearing into accusations of doping. The AP reports:

"U.S. District Judge Sam Sparks ruled just hours later. He criticized Armstrong's attorneys for filing an 80-page complaint the judge says seems more intended to whip up public opinion for his case than focus on the legal argument.

"Sparks, however, did not decide on the merits of Armstrong's case and said he can refile his lawsuit."

Over the weekend, about 1.7 million Libyans cast a ballot to choose a prime minister. Like Tunisia and Egypt before it, these elections are the first free elections since a revolution toppled the country's dictator.

Moammar Gadhafi ruled since 1969. As Reuters reports, while there were some violent incidents and anti-vote protests, international observers gave the election process a thumbs up.

Reuters reports:

An investigation into a perplexing outbreak among young kids in Cambodia is getting traction.

Doctors have identified a potential cause, a virus associated with hand, foot and mouth disease. (The illness is not foot-and-mouth disease, which affects only animals.)

Brian Castner arguably had one of the most nerve-wracking jobs in the U.S. military. He commanded two Explosive Ordnance Disposal units in Iraq, where his team disabled roadside IEDs, investigated the aftermath of roadside car bombings and searched door to door to uncover bomb-makers at their homes.

For the second month in a row, Republican presidential contender Mitt Romney and his party have raised more money than the Democratic incumbent, President Obama.

Romney and his fellow Republicans hauled in $106 million in June for his presidential campaign, well above the $71 million raised by the president's campaign and Democrats. Both campaigns released their fundraising figures for the month earlier today.

Much fanfare followed South Sudan's independence one year ago. But challenges were also exposed, like how to manage oil revenue and build roads, homes and schools. Guest host Maria Hinojosa learns how the world's youngest country has been doing this year. She speaks with NPR's Ofeibea Quist-Arcton and Juba-based radio host Mading Ngor.

I have a simple question for you: Do you have a good idea? Something that could change the world?

Enter your big idea in NPR's "What's Your Big Idea?" video contest from July 9 to Aug. 12, 2012, and you could win the chance to get advice on making your big idea a reality from a big name in science and technology. And even if you don't win that grand prize, we'll showcase your video on NPR's YouTube channel and on Facebook.