URBANA -- For years, corn farmers have gauged seed-corn quality based on more than 30 traits, such as drought tolerance and stalk strength, before selecting the best variety for their operation.

KUALA LUMPUR/TEHRAN (Reuters) - More evidence emerged on Tuesday of the crippling impact of new sanctions on Iran, with international traders saying Tehran is having trouble buying rice, cooking oil and other staples to feed its 74 million people weeks before an election.

The seven-part series launches Saturday, March 3 at 9:00/8:00c on the cable channel.