GMO crops so tough that farmers are turning to Kevlar tractor tires

Farming is one of the most difficult ways to earn a living. You'd think that with all the innovations mankind has developed over the centuries, we could make farmers' lives easier. But as it turns out, sometimes miracles of modern science make things tougher. Literally.

Take genetically modified organisms (GMO) for instance. For now, let's ignore the controversy over its safety, usefulness and ethical issues. The main issue for those guys actually growing and harvesting the stuff is much more practical. As it turns out, corn modified to stand tall and tough against pests is also wreaking havoc on tractor tires.

Mark Newhall of Farm Show Magazine tells American Public Media's Marketplace that after the stalks are cut during harvest, the leftover stubs are like "having a field of little spears."

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