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DNA evidence broke ground by taking the uncertainty out of criminal convictions. But what was once a slam dunk to judge, jury and the public is increasingly under scrutiny. Today, unraveling genetic evidence.

Plus, Marshall, Texas is not what you'd call an innovation hub, yet a quarter of the nation's patent cases are filed there. A reporter looks into why patent holders and trolls choose this sleepy town and its one powerful judge to settle their suits - fast.

If you’re into tech I’m sure you’ve heard the joke about Apple’s iPad – not since Moses has the world been this excited about a tablet. Truth be told, the iPad’s iconic features didn’t drop from the sky into Steve Jobs’ hands – if anything, tech development is a lot more like evolutionary biology – and if you look beneath our latest and greatest gadgets, you’ll find evidence of that evolutionary process – products that were born of good ideas, but didn’t quite make the cut.